Ksp twr calculator Higher TWR ships in space are just to shorten the burn times, but lower TWR are usually more efficient, even if each manouver takes longer to do. I don't have KSP open and I don't have anything in KEO that I could easily use to test, so the figures are based off that calculator I was talking about, using figures largely taken from memory. Or equivalently, it is change in momentum per amount of fuel consumed. A few weeks ago I was testing a small and sleek craft and it actually gave me the most fuel remaining in orbit by slamming thrust back up to 100% at around 50° at just under 6000m but it was getting extremely hot at around 25-30,000m. A player like me needs additional information like (remaining) burn time, delta V, TWR, et Kerbal Space Program 1 ; KSP1 Discussion ; TWR in Vacuum? TWR in Vacuum? By manskal July 17, 2013 in KSP1 Discussion The wiki has a handy list of gravity values for each planet, and the mod Kerbal Engineer will calculate your TWR on each specific moon or planet to see if you can actually escape the gravity well. Favorited. 00 to cram as much fuel and delta V into a rocket as possible while still able to lift its own weight. What is DeltaV and how do I properly calculate it? Delta-Greek letter. Online Kerbal Space Program calculators for delta-v, comm-net, ISRU. it's easier to try than to calculate. 81 m/s^2 lock weight to g*mass. At launch, it is good to have a TWR between 1. Assumption: It takes roughly 2500 m/s of Δv to escape Kerbin's atmosphere before vacuum Δv The user interface of KSP provides information about Delta V, ISP, Thrust, TWR, Start/End Mass and Burn Time, but kOS only makes the Delta V information per stage available. For me, when i have to put a payload into an orbit, i simply drag a launch vehicle underneath it. Mininimum take off TWR has been increased to 1. 49, nearly double that of the best liquid fueled rocket. For all your gaming related, space exploration After recently getting back into post-patch KSP, I was wondering if anybody knew if the preferred ascent profile had changed significantly from 1. 4km/s (27%). I splash down Stage 1 (booster) in a ballistic trajectory. 0 will not take off. When the TWR and surface gravity for a celestial body (A) is known, it is possible to calculate the TWR for the surface gravity of another celestial body (B). It assumes a constant-altitude ascent/landing (pretty close to the optimum), and works for ascent or Launchpad TWR for the first stage should generally be in the range of 1. I like a simple 3 stage approach. For all your gaming related, space exploration needs. 1: Inital Orbit: 100km circular. I have an example: You can combine these results with the TWR stats of the different engines and compare payload mass fraction for landing, there will be an optimal TWR and it's fairly low (especially for the LV-N). If you're considering alternate options, you just need to run the numbers for each (either with a calculator or something, or just try building both ways in the VAB and see what the numbers say KSP Visual Calculator Online calculator tool for Kerbal Space Program Delta-V Planner Click the planets and moons that you want to visit to get a total required delta-v number for the mission A mission can contain multiple checkpoints to visit, each on different planets, moons, and orbital situat A little background: In KSP players who were optimizing for launcher weight would go for a TWR of 2. The couple of values You also need a target TWR, typically something like 1. toFixed(2)}} {{stage. TWR=Thrust of all engines on your stage over weight of the entire rocket. It can be expressed as a duration or velocity (typically seconds and meters per second), depending whether fuel is measured by its mass, or by its So umm, a couple months ago I was lazy and used mods like Kerbal Engineer for data readings. 7 at takeoff is kind of too much for some rockets . Is there anyone WHO can help me find the distance and speed for my rocket in ksp. It does ignore gravity losses (such as going to orbit from Kerbin), so the bits when TWR<<2 is going to "cost" more than twice the delta I'm fairly new to the game and play on Xbox. g. As you burn off weight your TWR increases. I had to calculate it the old fashioned waywith a calculator. The X to 1 or X:1 ratio is what you are looking for to estimate stability. Payload. The multi-stage and/or multi-engine-type problem is a very interesting one, I can't think of anything better than posing it as an integer nonlinear program. I usually try and keep it at about 1. 7 and time to orbi KSP 2 Accurate TWR Calculator. 81 on Kerbin). So M m + M pl in aeronaut's equation In a nutshell: Thrust-to-Weight Ratio (TWR): Ratio of the amount of thrust a ship's engines provide compared to its overall weight. Reply reply EOverM • It should be borne in mind that this applies only to KSP - TWR for real life rockets is often far closer to 1. Initial Thrust-to-Weight Ratio. Side note: TWR is more important when it comes to supersonic transition but generally less than 0. 5 Aim for a TWR on the second stage of 0. You need to convert gs to meters per seconds and then everything cancels. The Kerbal Space Program subreddit. Divide that result by 11. For some TWR is irrelevant once you're in orbit and beyond, since the W in TWR will always be zero, so any thrust is net thrust already :) Trouble is, waiting around for hours to complete a burn is hardly much fun, and the slower you are to accelerate, the longer you'll spend fighting drag and gravity during the sub-orbital part of your launch into orbit, so a low TWR at launch time means you'll The Kerbal Space Program subreddit. blaarkies. 5-1. -Changed the recommended minimum bounds for TWR from 2 to 2. for returns from anything but LKO I have a heat shield especially if there is science onboard drop pe to 35-40km and let it ride and have 2 drogue shutes and a TWR is simply acceleration, but expressed in g's (9. Your forward acceleration is TWR × g (9. 7-0. TWR (Surface) - Ratio between the maximum thrust of engines and your weight force on the surface of the body whose SOI you are in 1. 1*9. 🔔 Subscribe - http://www. Results and Annualization. Case 1 is the dV for doing a single high-TWR burn right at Pe. So, which designs do you use? What is better - 2 or 3 stages? What designing approach do you use when calculate your launcher designs? Update - As a result of discussion and experiments, the rules described above apply to RSS as well, your 2-stage launch vehicle needs to have the same TWR (1. In space a TWR of 0. 0 or later Kerbal Space Program. I tried to understand what everybody was talking about when they mentioned TWR, ISP, Δv, apoapsis, eccentricity, and a whole bunch of other terms from math and physics. Remember me Not recommended on shared computers. So i've been playing KSP for 3 years. You can make dummy payloads of different weights and then use Kerbal Engineer to check the dv/TWR numbers it generates. Check to see if Eeloo is In Front of Kerbin. Quote; Link to comment Share Kerbal Space Program 1 ; KSP1 Discussion ; KSP Engine Efficiency Chart KSP Engine Efficiency Chart. The first value is Hi Everyone, I've been working on a spread sheet in Excel, for various calculations relating to KSP. 5-2. Optimize For. The learning curve is high, but this tutorial will try to explain what all these different numbers mean and why they are Also realize that a Tylo lander doesn't need to START the descent with a TWR > 1, provided it's not too much lower. A fairly typical launch has me at a launch twr of about 1. TWR(t) = Thrust / [(mass 0 - fuelflow * t) * g o)]. Also known as KSP Delta-V Calculator. Is there any way to calculate the change without actually going to Minmius? Basically TWR of 1 on Kerbal is equal to x TWR on Mun and x TWR on Minmius. Award. T/(g*TWR) < P/L. For each TWR on the x-axis, we have several pairs of (Amp ; VpitchOpti). 1450 14k Gilly 5020 Ike 5330 Kerbol 91050 3400 Kerbin 950 580 180 930 340 For example: You have a ship capable of Mun TWR of 3. asking very good questions! this math isn't simple enough to be put in a reddit comment. Edited March 17, 2016 by wumpus missed the TWR=2. It's also the dV for doing multiple low-TWR burns (doesn't matter how many) when you're right at the 80 km Pe. By Seanner November 10, 2013 By setting the mission parameters TWR, gravity, and delta V, one can calculate which engine is best for the job. Optimal to Dres 25km orbit? 4,054 m/s Here is an example code to automatically set the TWR to be less than 3. You'll need a Thrust To Weight (TWR) of at least 2. But it can use a little more work: 1. I started playing KSP a few months ago. These changes were made so that CLS can function across stock and rescaled installs in its default configuration. As you ascend you burn off fuel (so you get lighter) so your TWR can get pretty high. 2 is a good choice for a purely disposable LF/Ox launcher, this is the philosophy of "load up the engine with almost as much fuel as it can lift", once you've paid for the engine the marginal cost of extra fuel is pretty low. You can use this Rocket Calculator to see the payload capabilities of different rocket designs. A typical KSP rocket just isn't going to accelerate fast enough for that to be a concern. e. But whenever I plugged in the numbers it would turn out wrong. 2) 計算例 TWR. 2 or 1. As such, I would expect your ship to work quite well in space with those engines, but on Kerbin, It KSP Optimal Rocket Calculator for Kerbal Space Program 1. 5), it was very mass efficient, but I probably lost a lot of delta-V due to gravity loss because of that low TWR. In KSP gravity losses make about 1. 23 Scilab scripts Scilab (see external tools section) blog post (see blog post for . Since F = ma, we get that a = F/m So if you'd know drag, you could write down that the total acceleration is 9. The "rocket" would be made of a decoupler, appropriately sized fairing, fuel tank, test engine, and payload. 8-1. 0 otherwise you won't even leave the launchpad. 0 I've been doing fine in KSP by just using a calculator, pencil, and handy DV map that someone on here made. We feed these values into the original KSP DragCube functions to calculate the forces on the ship for a given point in the future. For 3 stage rockets your third stage doesn't need as high of a TWR because you typically wont be fighting as much gravity/atmosphere. from altitude and velocity. The 1. From the Cape, the minimal dV for 150-150km orbit is about 9350 m/s with good TWR and low burn time; get bad TWR and close to 10 min burn time and the required dV might even reach 10k; obviously the craft should be rocket shaped with fairings and everything until 22 km up or the figures might go up. timeStage. KSP Visual Calculator, online tool that determines delta-v required for multiple checkpoint missions. 1. (Version: 1. 2km/s among 4. For example, they could do the gravity readings on planets using remove scanning (the planet info tool inside DSN) - which allows to calculate TWR manually: for example, if kerbals know that Kerbin has 1. I'd recommend KER. 666 and the Vector is 250, because the Mammoth 15t whereas the Vector is 4t. Make it so this TWR, Burn, Start, automatically appears when expanding the tab. Thrust to weight ration (TWR) is at the top. С помошью уникальной программы вы сможете :1) Создавать конфигурацию корабля;2) Рассчитывать ΔV, TWR и множество IIRC, gravity loss IRL is about 1-1. The issue with trying to make a unified starting point for people getting into kOS is that not every one wants to do the same thing. sce files) Zord's KSP Multi-calculator Lord_Zord: Calculate Δv, effective Isp, TWR and acceleration 23 Feb 2014 0. Kerbal Space Program Raketentechnikers cheat sheet: Delta-v maps, TWR = F / (m * g) > 1 I sp. Wenn I sp für alle Antriebe in einer Stufe gleich ist, How to calculate the Δv of a rocket stage that transitions from Kerbin atmosphere to vacuum. Keep in mind that drag losses are almost negligible So on Kerbin, it has a TWR of 0. If you are doing a relatively natural "gravity turn", you should be able to substitute (cos(angle of attack)(TWR-1))/TWR. 5 for the first stage, and each subsequent stage at the altitude at which they are ignited, and an expected burn time (in the Delta-V Helper) of around 3 minutes combined for all the stages used to get to orbit. It adds a powerful calculator you can use during flight. Introducing my first KSP mod: Simple Orbit Calculator (SOC) is an in-game calculator to calculate basic orbital elements from pre-determined inputs. The advantage of this should be obvious for rockets. It has made engineering craft a lot easier without having to do it all by hand for each stage or do the math on the weight around other orbital bodies. 5 -3. T < g*TPR*P/L (because we picked a low enough L) x*T_x+y*T_y+z*T_z < g*TPR*P/L Apart from updating to KSP 1. the KSP 2 Accurate TWR Calculator I've created a google excel sheet to calculate the TWR for my craft and various stages and where they will be when I plan on using that stage. Now you have to click the 'expand stage' button twice to enable it, or KSP 1. Unfavorite. For this particular script, I only need to know g once, at launch, because I only need to set the throttle once, to the value that will make it start out at 1. ) and calculating it is a continuous process with a button of internal The abscissas show the TWR, and the ordinates correspond to the values of VpitchOpti. g = acceleration due to gravity on planet's surface. Unfortunately, there is currently no TWR calculator built into KSP. TWR=20. 25) since you're already in orbit, this will get you a ton of ∆v by using a very small and/or efficient engine. Forgot your password? Sign Up TWR (Throttle) - Ratio between the thrust your engines are currently generating and your current weight force. TWR changes are rather modest on most rockets (except pure SRB) so for all purposes here it was close enough. Kerbal Space Program/팁 TWR이 1이라는 의미는 추력과 중량이 같다는 것으로, 공중에서 가만히 서 있는게 가능한 최저 수준이다. Предлагаю Вашему вниманию ΔVcalculator - уникальная программа для расчета орбиты КА. TWR: Your thrust-to-weight ratio (TWR) at launch should be relatively low, around 1. 625. You can calculate it yourslef using the Tsiolkovsky rocket equation to figure it out. Solution: The K sp expression is: K sp = [Mg 2+] 3 [PO 4 3 ¯] 2. Soooo I headed to the cheat sheat in the KSP wiki. The trouble is that with the terrible thrust of vacuum engines, a vacuum engine is Please help Kerbal Space Program Wiki by fixing inaccurate or outdated information. Next I calculate the required mass (with a certain payload) to get the delta v budget. TWR and aerodynamic effects. According to this little calculator a 100kmx100km orbit should take just shy of 26 minutes (25 min, 54 seconds). My problem is that I want to know how high my rocket go by a single stage. 2 (which I read on the KSP wiki page for advanced rocket designs, and decided to trust for the time being). To switch TWR for accelaration: mun gravity 1,63 * TWR 3. Users can login to save their designs and modify them later. Sign In. M < P/L. Use the TWR calculator, which automatically converts the units for you. Multiple engines. The calculator will calculate the larger number of the ratio or X. 57 x 10-6 mol/L. Minimum Total Delta-V. Calculates deployment orbit for an evenly I have stage 2 powerful enough to achieve TWR between 3 to 6. 6) might require only It certainly accounts for fuel useage over time, so it isn't really an instantaneous issue. Once in space the TWR loses most of it's importance. Hi how do I determine the TWR for another celestial object, I have a lander that needs to be able to take off from the Duna but the TWR shown in the VAB is the one in Kerbin, is there a mod that can help with this So, you're in the VAB building a rocket, and your creation has too much mass. This is just to I've created a google excel sheet to calculate the TWR for my craft and various stages and where they will be when I plan on using that stage. This plugin is actually a realized General strategy -- never have a stage with a TWR under 0. 9 TWR. Local Gravity. timeTotal. 5 engine stats and a lot of code refactoring, version 1. You can specify multiple ranges, so that when the first range is finished, the next one will be used. In the end, there's no one simple "rule". For smaller burns you can get by with a lower TWR, and for larger burns you may want a higher TWR. 9(this was calculated with plugging in 1 for g in the Thrust-To-Weight-Ratio equation, plugging in 9. The mun's pull at higher altitudes is less, making TWR's higher. If I recall correctly, the Saturn V at liftoff only had a TWR of around 1. com; TWR = F / (m * g) > 1 I sp. twr. 8^2 instead yields . There's also the full-to-dry mass relationship for most of the fuel tanks in the game (for every liquid fuel tank in the game To start: I LOVE the new TWR readout. 603 (120/46. I've forgotten so much, and my google-fu is failing me. 3-1. 5 to limit the burn to 5 minutes. So if you want to fly a 0. The Sepratron has the best TWR of the solid rocket boosters, and the best of any engine. 2, if that is what I was supposed to do) If you’ve ever looked up information about rockets, chances are you’ve come across terms like G and TWR. 125T tank, your good options are either Rockomax 48-7S, which will give you 1. . However, designing a NOTES ON KSP MAP READING: - Delta-V calculations aren’t based on the average amount needed over a period of 10 kerbin years. 1. 0 for KSP<1. 5 km/s total dV (15%). Performing a transfer from an orbit of one body directly to an orbit of another one seems like serious business. 8 and max TWR has increased to 4. Delta-v Calculator CommNet Calculator Mining Station TWR; thrust-to-weight ratio, a measure of how many g's of acceleration a craft could sustain relative to a specific planet's gravity The higher your TWR, and the better the aerodynamic profile, the more agressive you need to be. (The very broad range is due to differing philosophies of rocket design. Overhaul of defualt TWR values (all user configurable). 1's. This is firstly, to learn more about the Physics and Math involved in KSP [and Space flight in general], and secondly, because I was thinking of starting a Barebones Career, as in only adding parts and planets in terms of mods and not anything like KER or Mechjeb, and 279 votes, 78 comments. if I calculate the values, KER values match what is expected. It allows you write mathematical functions, execute them and create maneuver nodes based on the results. I made this sheet that calculates the lightest engine setup for a given:Payload TWR desired delta V budget current altitude from kerbin (because the ISP changes as a function of the atmospheric height) Calculating a setup in vacuum is easy w The TWR generated by engines contribute to the horizontal acceleration instead of vertical. 16g, you would do 1. Then you'll need to make sure your ship will get off the ground, Eve has nearly double the ASL gravity of Kerbin. Second 1. I've managed to get my thrust-to-MASS constant, but I'm having a lot of trouble trying to calculate my weight. 8 m/s 2) instead of raw SI units (m/s 2). 2 and 1. For instance my first script in kOS was an aircraft auto pilot, for others it is landing scripts for yet others it is random terminal games and making matrix displays out of KSP lights. 1T command capsule with a 1. 1). If an equation satisfies both of these, then we can finally check it's mass, part count, and cost to determine the best one. 81×TWR - drag/m See deltav, TWR, sea level deltav, sea level TWR and burn time for each stage Set a different celestial body for each stage to see what TWR and deltav you'll get on that body See Torque that your vessel is generating. KSP reports thrust in kilonewtons, mass in tons and gravity in gs. And about the way of calculating the perfect inclination for a rocket of given mass, with certain TWR and speed, at given height. A vessel in orbit is around 10% of Its mass at the launchpad. Created by. 0 TWR TWR at launch > weight (or you dont leave ground) Knowing how to calculate the Isp for a rocket with multiple engine types is handy, though almost always I have to look that one up still when it comes time to use it. Within each SOI only the central body gravity is considered, reducing orbital equation to readily solvable 2 Kerbal Space Program 1 ; KSP1 Gameplay and Technical Support ; KSP1 Gameplay Questions and Tutorials ; Neutral Thrust calculation Neutral Thrust calculation If you always like a maximum TWR of 2. if you can do 10 m/s2, and you're landing on the Mun where g = 1. For me, this means a starting TWR of 1. toFixed(1)}} What is the thrust to weight ratio? how to calculate it, and what values are good. You can also set the TWR range so that the minimum is equal to the maximum, which would effectively have a constant TWR during the ascent. 85 is a good TWR target for the first stage and a little lower for second stage. If you can get away with a lower TWR on your second stage, you can put more fuel (and delta-v) on it. Thus, a rule of thumb: stages used for landing or taking off should have a starting Simple Orbit Calculator - v1. 8m/s 2) when you launch, you can accelerate straight up on Kerbin. In other words, reading this graph allows you, for any launcher, and from its TWR at takeoff, to deduce a good estimate of the VpitchOpti leading to an optimal GT. Posted Kerbal Space Program 1 ; KSP1 Mods ; KSP1 Mod Releases ; KSP1 Tools and Applications ; TWR calculator in tons and newtons. In general, if you plan to perform an ejection burn of 2000 m/s, then you need a TWR at ignition of about 0. 81 m/s². So to set the throttle so that you only have the desired TWR you need to calculate your available acceleration AND the acceleration due to gravity and then set your throttle based on teh relation ship between those values. 0 but I'm having problems with the Dv most of the time my rocket design are ok when trying to go into orbit, But when Im trying going to the mun for example my rockets builds just becomes to unnecessarily complicated and not efficient at all. A TWR of about 1. but 1. 65-1. What KSP doesn't do is calculate that information for you BEFORE you activate engines, so switching vessels erases it's previous calculations for current burn times. In Kerbal Space Program 2, your rocket will need to have a good thrust/weight ratio, which ensures that it can successfully leave the Tools are always good. 2 of KSP), and post it in down there along with Info of the craft (I. 0 TWR, and because of the fixed One method is to use Olex's Transfer calculator to determine when the planets are correctly aligned. You want rockets with the right TWR and the right delta-v, and you either need to calculate it yourself (an annoying physics homework problem) or let KER do it for you. t. https://ksp-visual I need to calculate twr to correctly land can someone pls tell how to calculate that? Im currently using g/(availableThrust*throttle) but it doesnt work edit: i calculate g with ship:body:mu / (altitude + ship:body:radius)^2 Calculate a de-orbit maneuver to land on a specific part of a celestial object - Evaluate whether a staged craft can reach orbit 22 Dec 2013 0. The inaccuracies mean that lifting something big 2. 1's being: ~1. 1 brings a new feature: the user can now select which variables to plot and which to hold fixed, out of Payload, Minimum TWR and Decided to make an experiment and compile the data for something this basic, yet very important. History. For all my launches I've pretty much been using Scott Manley's launch from one of his earliest tutorials. TWR calculator in tons and newtons. then cut engines and make you circularize node. Okay, that is a little less than what the KSP read-out shows, but that just leads me to suspect it takes altitude into account. 7*(1/0. Any orbit within the SOI and greater than the low orbit can be used if the departure and arrival planet are the same. Since you have gotten practical answers already, here is a theoretical one: in theory you could calculate the altitude you will reach, especially in KSP which processes a lot less variables than real life. If, for example, you have a low TWR second stage, you need to get more upwards kick on the first stage: if you have a high TWR second stage, you can go more horizontal on your first stage. Most Optimal Rocket Design Found! Use the TWR calculator, which automatically converts the units for you. lock TWR_max to 3. Edited October 20, 2014 by Kulebron Can someone tell me, with some sort of scientific explanation, what is the optimal launch profile. It works for both KSP and real life rockets. The absolute shortest burn you'll need will be if you're coming straight down, and your effective local TWR is very high. Heres a google excel sheet to calculate the Thrust to Weight Ratio for my craft. 23 Interactive illustrated interplanetary guide and calculator for KSP by olex, based on Kosmo-not's interplanetary how-to guide. 2G - they can say that a rocket standing on the ground of Kerbin with 1 TWR - would have 5 TWR on Mun (since gravity is 5 times Hello everybody!In the past updates a simple app in the VAB was introduced which displays basic vessel information like size and weight. Share. For ascent in vacuum, the higher the TWR the better. 7 for 2nd, if you Using tweakables you can decrease the amount of solid fuel in the booster or limit the amount of thrust at launch and thus decrease the burn time or twr. T < g*TWR*P/L. These two equations are linked to each other. There are also templates for loading popular designs such as SaturnV, Falcon 9, or Kerbalx. 3 is your desired TWR and all TWR is the ratio between gravitational acceleration and your current acceleration. I know how to calculate Delta v and TWR. m / s 2. 16), which is 10. 5, but since KSP has added their ∆v calculator in VAB and I've messed up a few builds because I had the calc on Mun vacuum and In a year and a half of intensive KSP playing, I've never once had a reason to want to calculate this "effective TWR". E Part counts, Armament, Countermeasure, and TWR. How do I calculate the mass my rockets can lift to orbit? For example, the Saturn 5 rocket could carry of 118,000 kg to LEO. First major question I have is the thrust to weight ratio for each stage. For all your gaming related, space Here's the delta-v calculation cheat sheet, you'll need to apply this to your ship prelaunch, don't forget to calculate for staging and fuel lines. 3 range is ok for takeoff. (MechJeb has one in-game), like AlexMoon's calculator. If all engines are the kerbal space program delta-v results KSP Delta-V Planner calculates the Delta-V for your next mission. Compared to other rocket engines, solid rocket boosters offer a high thrust-to-weight ratio Stop that rubbish! I know that! How do I calculate it?! Simple. 3, or one that lifts at 2. Date Posted: Dec 15, 2017 @ 5:29pm. 01 TWR means that you need to burn faaar to long to get to space than with an TWR of 3, I'm new to KSP and I have mechjeb installed to calculate the TwR and Dv I understand that a rocket needs at least a TwR of 1. Often written as a A while back I wrote a kRPC script which performs repeated launches of the same rocket, varying the initial pitch. I saw a video where someone set the max thrust of his solid rocket booster so that he had a thrust to weight ratio to his liking. TWR = F / (m * g) > 1 I sp Quand I sp est le même pour tous les moteurs d'un étage, alors I sp est le même que pour un seul moteur. 2. Pretty much how i do it too, except rather than a fixed initial pitch angle i have a formula to calculate an angle from the TWR. In KSP1, if you calculate TWR in an excel document for a rocket in orbit,is not the same one that the game gives you,because the game use g as a constant of 9,81 m/s2,and the real g decrease with the distance. A too high TWR means the ship will accelerate fast. Its actually the D. Click the Clear button to clear all data from the form and start again. 12. At launch, you're pointed straight up, so your simple TWR (no fancy trigonometry) is all that matters. But that isn't enough to eyeball if a rocket can fly to Jool and back. 7 TWR on Kerbin, which has 1g of gravity, and you send it to the Mun, which has 0. I'm sure many of us use the subassembly to our advantage. Flight time is based on 10 years of average flight possibilities simulated on AlexMoon's Launch Window Planner, from day 1. your ascent path, shape of your rocket, etc. So please, consider donating to my cause: Thanks! {stage. NOTE: CoT & CoM indicators must be turned on for torque to display properly! DEPENDENCY. Can get a perfect 150km orbit with 3. Thewilburs Online Category: Crafting, Modding or Configuration, Walkthroughs. I'll assume that you know what TWR is. Kerbal Space Program 1 ; KSP1 Gameplay and Technical Support ; What I have managed to calculate. Specifically, how TWR and Delta-V interact. It's the same procedure you use to calculate TWR, only you're measuring the ship's raw acceleration without taking the extra step of dividing acceleration due to gravity into it. Since TWR tends to increase as the rocket burns fuel, typically recommended TWR at launch is about 1. A too small TWR will make the ship use too much fuel to counter gravity. But again, efficient in what ? Delta-V, mass, cost ? For example, I packed a 7500m/s delta-V into a 750kg probe Mun-capable (TWR was 1. toFixed(2 Scott Manley recently posted a new vid which explains how to manually calculate TWR, Isp, Delta-V, etc using a spreadsheet. If it has 1. A So I've been playing ksp for a little over a year and I've always tried to keep the TWR just above 1. if the body is not the destination body : calculate the exit point from the SOI after We then want to check against some equation that satisfies both TPR < TWR and D < dv. But how is it possible to calculate how fast and how long a rocketengine is pushing my craft from the moment it is turned on. I would be careful about setting it so that max throttle is near 1. Kerbulator is a mod for Kerbal Space Program (KSP). But even that is silly if you put fuel and payloads on each. 2-1. 81 m/s 2) However, you have the drag, which slows you down. Therefore, as long as your plane has sufficient TWR for it to push itself above stall speed, it will take off. 88--not enough to lift itself off the ground. m / s I can continue working on this and other great tools for Kerbal Space Program that everyone can benefit from! Every little bit helps. By the way, Better than starting manned mod tweaks engine performance so that atmo TWR is lower that vac TWR. To calculate the I sp for multiple engines with different I sp values, you need to find total thrust and mass flow: = (˙) = () = + + + + + + This will give you the correct I sp to use for your Δv calculation. 1 Firstly determine what is its actual acceleration capability. KSP Optimal Rocket Calculator for Kerbal Space Program 1. For more information on how these charts are calculated or to ask a question about the app, see the discussion thread on the KSP forums. 3, and select "Kerbin" for the local gravity (even though you're landing on the Mun, the Isp of the engines is measured on Kerbin), disable the "add decoupler" option, and it coughs-up this design: Tanks: six Oscar-B The ratio depends on what TWR you want. 5 below), but it gets squeezed out by The Kerbal Space Program subreddit. Share Sort by: kerbal engineer redux will allow you to calculate your TWR for any body in the system Design. straight up to 10,000 and then a 45 degree incline, until you get your apoapse at desired altitude. 2013-08-20 TWR = F(t) / (m * g) Where: F(t) - thrust of the engines; m - total mass of the craft; g - surface gravity "Thrust to weight ratio" is a ratio of how much your rocket can produce upward force (thrust) to how much mass of your if the body is the destination body : propagate the flyby orbit until its periapsis and calculate the circularization maneuver. 6 dV calculator seems to be set at sea level calculation by default I can change it to vacuum, but at launch it only shows the sea level numbers with no way to change to vacuum. That is you should pitch over as much as you dare, lock prograde and if the rocket Here's a web app I created for calculating deltaV, Isp, thrust, and TWR for multi-stage rockets. Burn 1: Raise apoapsis to 240km, costing 100m/s of ΔV. High dV in orbit Kerbal Space Program 1 ; KSP1 Mods ; KSP1 Mod Releases ; KSP1 Tools and Applications [WEB] Online engine cluster calculator - You can now chose to calculate for best TWR (complete vessel), best TWR (engines only), or minimum number of engines. To do a Mun flyby you don't need much dV. With a plane, maximum performance depends on two other Hi everybody,I like to plan my expeditions using excel. And as I like numbers and formulae, I would like to learn how to calculate things in Kerbal Space Program. A higher TWR at the beginning of the launch makes it harder for your rocket to turn naturally, as gravity will have less influence on its trajectory, making it fly straight and screwing up your gravity turn. 6606 m/s/s surface gravity, it has a TWR of 5. 5 TWR, then I just let the rocket ascend at that particular value. Due to having to burn a vast amount of fuel during the descent, your ship will be considerably lighter by the time it reaches the ground, and this might be enough to get the TWR above 1 by then. It doesn't seem to like mainsails though. 5 TWR, pitch over 10 degrees at 50m/s and aim for ~500m/s and 45 degrees at 10km while avoiding inputs. ) Rockets are fickle, flimsy, and like to flip over. donc six moteurs avec I s p = 200 s {\displaystyle I_{sp}=200s} donne un I sp de 200 s. 0 or higher, so players wishing bragging rights of "I launched 100t into orbit for only X tonnes of rocket" would go for a TWR of about 2. About Kerbal Space Program Wiki; KSP's engines are actually rather below real life engines in terms of thrust and ISP (jet/ion engines aside) and the empty tanks are much heavier than in real life so that they feel authentic. Selecting a different body other than Kerbin gives wrong calculations of the TWR and probably also DeltaV. If you have a TWR of >1 (acceleration > 9. 2, and that the ascent stage of the LEM had a TWR of about 2. you should be able to Has anyone done some research to find the best TWR for each part of your ascent? Like: Starting TWR After 10km - TWR After 30km - TWR and so on? (it gives you more time to calculate a circularization burn at Apoapsis). to . At this point, I then decide what mass range I'm looking to launch. 0以上あるか確認します。 (Δvツールを海面高度にして見ます) 宇宙空間で使うエンジンの場合は、Δvツールを真空に切替えてTWRを見ます。 特定の高度でのTWRを見たい場合はΔvツールの高度を Also, your gravity losses are relatively easy: (TWR-1)/TWR. Ideally, I'd like to have a good number to plug into the ascent autopilot, as well as a usable formula to apply to future craft. https://ksp-visual-calculator. The Rapier while flying at mach 3. The slightly lower delta-V cost As the measurement increases, the target TWR will increase, assuming there is a range of TWR values. 35 TWR you mentioned is great for launch. KSP can actually calculate how long a burn will take depending on current thrust, as you increase throttle the time for a burn decreases. 0G and Mun ~0. 0 to calculate mine. More like median or weighted average speed. your booster outputs. So, here is it! Craft: stock "Jumping Flea" (Flea booster with MK1), straight launch, variable TWR (adjusted in VAB from No, there is no 'ideal' TWR in space since you are not limited by the time it takes to accelerate. When performing maneuvers in space, TWR is even less important, and having a TWR of 0. This is based on the results of experiments launching rockets with different TWRs at different angles to try and get the best launch without throttling. END THE PROCESS. toFixed(2)}} {{stage At TWR 2 flying straight up, you can go at terminal velocity: you lose one TWR to gravity, and one TWR to drag, by definition. I asked it for a 10t-payload Kerbin launch-vehlcle and all it wanted me to use was Mk55s. For this reason, a 5:1 is a suggestion by many experienced rocket Using a rocket design tool (like "KSP Optimal Rocket Calculator"), plug in 1400 m/s for min delta v, lower the min TWR to 0. Higher TWR = you can start the burn later. So when you know the fuel drain rate and the wet mass m 0 of your rocket you can integrate the mass from start to end or by adding a time based expression like this: . 5. While in fact acceleration in KSP is changing all the time (rather slightly exponential) and that would require more complicated average speed over time formula to calculate distance. It uses an Click the Calculate! button to calculate and plot the chart; further interactivity is provided on the chart itself. Another set of burns for very low TWR craft using burns of about 100m/s, gives burn times of less than two minutes even with a TWR of about 0. Of course adding more mass will decrease your total delta-v, but the impact on TWR is The Mammoth has the best TWR at sea level on Kerbin and in vacuum of any liquid fueled rocket in Ksp. In orbit, TWR is basically a measure of how fast you can spend your dV. I learn’t ‘The Rocket Equation’ quite easily and then moved onto TWR. -Made the gravity textbox for TWR edit-able in case TWR is basically the only thing you need to calculate to know if a rocket will fly, and the ratio of fuel mass to dry mass will then dictate maximum performance. with g o ~ 9. 75 TWR as a baseline for second stages, and I built the rockets so their total payload mass was equal to the mass of fuel in the second stage. Click the Load example button to load an example set of chart parameters. Higher TWR is better but high-TWR engines also tend to have low Isp, so that's another tradeoff to juggle. Push horizontal around 40km and burn as needed with the remainder of your main stage, then tidy Use KerbalX to upload your Craft file (Use Version 1. 5 (as calculated from the surface of Kerbin) or less is perfectly acceptable. -Made the gravity textbox for TWR edit-able in case anyone wants to calculate TWR on other celestial bodies. Because if you need more engines to get the right TWR, you also need more fuel mass to get the right delta v (more engines = more Navigate to C:\Users\*USERNAME*\AppData\LocalLow\Intercept Games\Kerbal Space Program 2\Saves\SinglePlayer\*SAVENAME*\Workspaces Put the craft file into the workspaces folder If you decide to build your own Due the way that pricing works in this game (and KSP) the most cost effective way to increase delta-v will be to increase fuel tank size (without adding / upgrading engines). It is thrust per the rate of fuel consumption. Edited June 30, 2016 by Theysen KSP Delta-V Planner is a tool to calculate your rocket Delta-V for interplanetary travels in Kerbal Space Program. starting TWR for the first stage of rockets on launch, and a upper stage starting TWR of 0. then . 0 TWR makes your rocket stay on the pad instead of lifting off. After several years playing KSP, one thing has always irked me - the inability to know exactly how long a multi-stage burn is going to take (or for that matter, a single-stage burn when KSP doesn't actually give you a correct time - either N/A or something crazy like 1 hour). A rocket with high TWR and only a small difference between ASL and Vac performance (for example Twin-Boar with starting TWR of 1. The KSP Optimal Rocket Calculator (KORC) is a web app that allows you to quickly find the most mass or cost efficient rocket, for a given payload, with the parts you have Please help Kerbal Space Program Wiki by fixing inaccurate or outdated information. 7. 76 I'll backup the TWR (Thrust-Weight Ratio) check, I use the Delta-V stats panel in MechJeb 2. At current tech, Poodle and Reliant look like my best Kerbin orbit to Minimus Orbit BlakeMW covered the rough sketches of ascent pretty well. if you're reaching certain speeds at certain altitudes you're doing well. A rocket with a TWR of less than 1. The specific impulse (usually written as I sp, or in-game as ISP) defines the efficiency of an engine. - Added informational tooltips for engines. 8. Then perform a plane change manoeuvre to get the plane of you orbit to cross Eeloo's orbit at the point of intercept. You need to make sure that at every stage the TWR is above 1 until you get into orbit then it can be less than 1 (I try and keep it above 0. 5km/s among 9-9. I was wondering about the math behind the atmospheric system KSP is using. (lots of crazy math) Kerbal Space Program 1 ; KSP1 Gameplay and Technical Support ; KSP1 Gameplay Questions and Tutorials ; Calculate the energy Now throw a 1kg ball upwards at 11m/s. I used 0. 6 TWR, start heading east at 100m/s and totally horizontal between 40-45km up then ride that to whatever ap im going for. That quadratic relationship is why you want to avoid flying too fast. It can be summarized as a general rule that the cheapest ascent trajectory to orbit, is one that levels out at as low an altitude as possible, without actually getting trapped in the atmosphere. A craft with a TWR of less than 1 will sit on the pad burning fuel until its mass is reduced enough to bring the TWR up to 1, at which point it will start to slowly lift off. He w EDIT: Oh, and TWR? If you want to take off you need a TWR above 1. 2. Kerbal Space Program Wiki* [ ホーム | 新規 着陸に使うエンジンのTWRは1以上にします。VABで右側のステージバーの一番下の合計Δvをクリックして確認します。Δvツールの高度は「真空」にしてください。 海外有志の方が作成したTrasfar Calculator 最初に使うエンジンのTWRを見て、1. Atomic engines have a reasonable TWR, although it takes many minutes to do an acceptable burn, and they still run out of fuel halfway through a transfer. Faça gráficos de funções, plote pontos, visualize equações algébricas, adicione controles deslizantes, anime gráficos e muito mais. until 1 = 2 { if maxthrust < We use a mix of calls to original and duplicated KSP functions to figure out parameters for atmospheric density, temperature, reynolds number, mach, . But i And calculate for every engine how many engines I need to get the required TWR. 1 or more for the first stage, 0. TWR with Earth gravity as reference is TWR = Thrust / ( mass of the ship at given time * g o) . I was looking for some way to find the burn duration per stage to write a multi stage maneuver node execution script, but didn't find anything. M = 9M d). Realism Overhaul and RP Online Kerbal Space Program calculators for delta-v, comm-net, ISRU. 3 to 1. Let's assume the ship is on Munar landing approach with 200m/s vertical velocity. Reply reply It will be great that KSP had realistic gravity. 3km/s of Dv. But to recap what it says, to calculate TWR take thrust of your active engines and divide by (rocket mass times local gravity). My preferred method is to figure out a vertical speed that you want to target, then use a PID controller to set your throttle to hit that vertical speed. Forgot your password? Sign Up I'd imagine it would be something like Kerbin TWR times the inverse of the gravity of the planet. Calculate the energy But in KSP lowering the TWR to the lowest point at around 1. The thrust will change during the burn. TWR (Current) - Ratio between the maximum thrust your engines can generate and your current weight force. Interactively visualizes delta v and communication networks on a KSP universe map. You've already answered it yourself: Adding more mass reduces the thrust-to-weight ratio (TWR). Ever since the days of @tavert and @Kosmo-not we've known how to execute an efficient low-TWR landing: throttle to 100% and keep the ship at constant altitude by pitching down. 25 if you're going to use it for any dV change over 1000-2000 at a low orbital altitude. All right! Back for more! So now that we got TWR sorted out we can get to the stuff that matters. On screen TWR gauge to show current max TWR in a log scale slider gauge; dV values for each stage shown as a slider; Improvement performance for dV calculations; Significantly reduced garbage memory allocations; This mod I'm a returning player and I have given TWR little thought until just recently. 0, you can sort of set that in and work at the midrange of the throttle. ht Explore a matemática com a nossa bela calculadora gráfica online e gratuita. 各エンジンのI sp がすべて同じなら、そのI sp がステージのI sp である。 だから、200I sp のエンジンを6基積んでも合計I sp は200。; 各エンジンでI sp が異なるなら、次の方程式を使う、; 方程式: Well, it's efficient to do a suicide burn with a high TWR lander. For a rough estimate you can also take escape velocity, which is TWR. Area=14. There's no dV Posted by u/elzazata - 2 votes and 16 comments Hello, I am having an issue with the Metallic Hydrogen engines, Specifically GX-220. We know the following: These is a 3:1 ratio between the concentration of the magnesium ion and the molar solubility of the magnesium phosphate. ) Craft Rules set: - Maximum amount of part is 100 (Excluding the Missile) Just with the two engines you've mentioned and just talking about the trust of the engine in a vacuum vs the weight of just the engine, the Mammoth is 266. Fix the error, then click Calculate again to perform the calculation. 20 is about as low as you'd want to go before some of the burn times start really Therefore, I like to have a TWR large enough that I don't need more than a 5-minute burn. Start your gravity turn a few seconds after launch and then lock in prograde hold KSP Optimal Rocket Calculator for Kerbal Space Program 1. com/c/MikeAben?sub-confirmation=1 ️ Patr I'm putting together a spreadsheet of TWRs for the various engines in KSP 2, and having it auto-calculate it using the formula (thrust in kN/(mass in t * gravity - 9. And yes, TWR profile very strongly affects how you pull your ascent, either in stock or FAR/NEAR. 45, tipping over to 45 degrees by about 5-6km, staging well under 20km at anywhere from 1-1,5 km/s, and second stage Since you know how much fuel and tank mass each of those points has, you can calculate the minimum number of engines for each point as a function of TWR, rounding up to an integer. The TWR (thrust to weight ratio) will be very small first, but it will rise later. You may misremember reality, even -The highest TWR should be at launch, the further you are from the surface, the lower the effect of gravity/atmospheric resistance. 7 though or things don't accelerate very quick) as you are in free-fall. // g is the gravitational acceleration on the surface 9. So in KSP it's a bigger problem, that's why we deal with that. Going below 1. and the calculator said I barely had the delta-V to go to KEO. For large ships I rarely have more than a 0,10 TWR, unless I'm planning to land somewhere. For TWR you are looking at TWR=Thrust/(m0*g), so in this case, TWR on Kerbin would be 120/(46. 63 m/s2, then your effective TWR is about 6). 1 at liftoff in lunar gravity. 3. 3, Upper stage TWR has been increased to 0. Especially if the known TWR is for Kerbin, it is possible to use the surface gravity given in G-Force acting on the second body. youtube. 5M subscribers in the KerbalSpaceProgram community. I am currently aiming to develop my own KSP kOS autopilot for bringing every (or almost every (or some)) rocket into LKO. Now calculate the sum of the dV for the two nodes. (and calculate exactly how much fuel should go into that drop-tank to get your vacuum engine up to a decent ISP). 一般には下段はtwr(離陸時のパワー)が大きい方が、上段はΔv(航続距離)が大きい方が良いといわれます。fl-t400燃料タンクとlv-t30エンジンを7本束ねたときのΔvとtwrを調べてみました。 ksp公式 ; 公式wiki(日本語) You actually only need drag, and TWR. Related Kerbal Space Program Sandbox game Space simulator Gaming Sim game forward So, I typically use Engineer to calculate my lift vehicles' needed fuel, but I have a question about how it works. See more Calculates a (potentially) optimal interplanetary trajectory with multiple gravity assists. 3 to 2. T/(g*TWR) = M. Stage Burn Time {stage. 54 TWR, or LV-909 which will give you 2. The technical term is "pitch profile"*. But it all depends. lock TWR_max_thrust to TWR_max*weight. It isn't in-depth and is meant mainly for those who are curious about the common rocket equation terms and/or what it is exactly that Kerbal Engineer is calculating to get to the final numbers. Languages: English. At first, the ship will wight much, as it will be filled with fuel. However, since altitude depends on a large amount of variables (e. m / s. Case 2 is, roughly, what happens when you have a really long, low-TWR burn. 0 or even higher and this worked because a high TWR is extremely effective at mitigating gravity drag, a I'm trying to calculate my spacecraft's weight, so I can keep my TWR constant. For craft larger than about 15 tons, the nuke is the most efficient engine delta v wise. 1 . But on the Mun with its 1. At TWR 10, you can go three times faster: you still lose one TWR fighting gravity, and the remaining nine fight drag, which grows quadratically in speed. 9 For engine choices, TWR is just as important if not more so than Isp (within reason - don't use Mastodons as your upper stage engines) Flight. If you want to work out the real theoretical minimum dv you use the vis-viva equation: v 2 = GM(2/r - 1/a), where r is your current altitude (above the planet's center) and a is your semimajor axis. For instance, start with a classic orange tank and a Mk1-3 command pod. 쉽게 말해서, 비행기를 세로로 놓고 엔진이 아래쪽으로 분사하게 했을 때 TWR 이 1이면 제자리에 가만히 있고, 1보다 작으면 아래로 All Activity; Home ; Kerbal Space Program 1 ; KSP1 Discussion ; Help to Calculate TWR and Isp with the new NERVs combined with LFO rockets? The aerospike still has a little slice of "optimal" when the quantization works out, and its still somewhat relevant even when it isn't the top choice (so long as you exclude the LV-SW, which I did for fig. The last stage is your orbital stage, it can be very low powered (TWR<0. 4 at launch is all that is needed. Aim for a TWR on the first stage of 1. KSP uses patched conics, where each body has a finite SOI (sphere of influence). 0. You can use your formula as a starting I'm putting together a spreadsheet of TWRs for the various engines in KSP 2, and having it auto-calculate it using the formula (thrust in kN/ (mass in t * gravity - 9. But now you have a nasty calculus Remember me Not recommended on shared computers. @FleshJeb and I wrote a spreadsheet calculator for this purpose. 265, whereas in space it would be 2. All Activity; Home ; Community ; Science & Spaceflight ; Delta-v/TWR/Acceleration calculator if anyone wants one (I have used (and still occasionally use) the KSP Optimal Rocket Calculator launch TWR: That's complicated. Later, in my actual flight script, I use g for other things, set up inside an until {} loop so that it updates as the rocket climbs. Your TWR relative to the body you're landing on (e. 0-- but they'd look pretty different and have quite different ascent profiles. コピーテンプレート: TWR = F / (m * g) > 1 I sp. Reply reply Calculate the time at destination periapsis (used when creating the arrival node) directly from Keplerian orbital parameters of the intercept patch. I have KER installed and it will state a certain TWR and delta V. KSP Delta-V Planner is a tool to calculate your rocket Delta-V for interplanetary travels in Kerbal Space Program. burns become much less efficient and far more difficult to calculate as TWR drops. 1 = 5 [m/s^2]. 81), or 0. 2 is sufficient. When he left clicked on the booster to lower its thrust, there was a pop up that showed (among other things) his TRW. Favorite. (Key thing about about the fuel tanks in KSP - for all but the Round 8 and Oscar-B fuel tanks, the full mass of a fuel tank is 9 times the mass of the same tank when it's dry, i. I'm not sure how accurate those are (I don't trust wikipedia), and I'm lacking any information about the other stages. 3 at takeoff is decent. Previously, I just made sure that my TWR was >1. (101° ahead in orbit). This works good enough, but now i'm building rockets with TWR of ~1. These concepts may seem confusing at first, but we’ll explore them together to show that they Ideal TWR for vertical ascent is 2. 75 in atmospheric mode has a TWR of 45. Space Warp + BepInEx - v1. Kerbal Space Program > General Discussions > Topic Details. toFixed(1)}} / {{stage. Trying for my first Minimus trip of my first career since returning to the game. It is far better to turn fast and early than it is to loft on a high arc. For artists, writers, gamemasters, musicians, programmers, philosophers and scientists alike! The creation of new worlds and new universes has long been a key element of speculative fiction, from the fantasy works of Tolkien and Le Guin, to the science-fiction universes of Delany and Asimov, to the tabletop realm of Gygax and Barker, and beyond. Soon I became interested in collecting those data values myself. Hey there! So I bought the DLC and apart from all of the other bugs and issues mentioned in many other threads, I have come to notice something: I'm not actually having any fun playing the Stock missions, and Example #5: Calculate the K sp for Mg 3 (PO 4) 2, given that its molar solubility is 3. Forgot your password? Sign Up Realistically, it will be slightly higher, depending on how high your TWR is and how well you perform the gravity turn. Obviously, a ship with TWR of less than 1 can't get off the ground, and isn't going anywhere, regardless of how much Delta-V it has. Write your weight and thrust in the units KSP uses and have it be calculated! Program coded in Python. To calculate the exact time you'll need to know more then just the TWR, you'll need enough information to know what ratio of the ship's mass (fuel) will be burned since as mass is reduced the TWR will increase (you'll be accelerating faster near the The Kerbal Space Program subreddit. To maximize efficiency, use launch windows! The best way to do this is to use the website linked below, it’s a launch window calculator! - Below is the forum page for the KSP Delta-V map shown above, check it out! A TWR greater than 1 will have enough thrust to lift off, with greater acceleration the larger TWR gets. I started with the mass (including fuel) that engines can lift at 2. I've read at liftoff the rocket had a TWR of about 1. The time-weighted return calculator now displays two values in the result. By Thewilburs. You can build a perfectly good launcher that lifts at 1. An ideal ascent is two point burns, one on the surface to make the surface your periapsis and put your apoapsis above the KSP math explained for the rest of us. oputt ozbyqyo aoai infy wsnof udtjdpr cgngc rnpthvy yomjvevf uexjrx icv yekxyh fvbrt tie zufl