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Maybe it has been asked and answered and I just don't know how to search for it. I know there is an answer but it's the question that I think is off. So... I suck at math. I can do a little basic algebra. That is why I am playing a game that is all about engineering and math! I have been going through sites reading about orbits and have found this. e=c/a where e is the eccentricity, c is the focal distance, and a is the semi-major axis. I know e and I know a. So c=a*e? Can I determine a periapsis and apoapsis from this and establish an orbit with the desired eccentricity and axis?
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Quick explanation: Sidereal time vs solar time. Above left: a distant star (the small orange star) and the Sun are at culmination, on the local meridian m. Centre: only the distant star is at culmination (there has been a mean sidereal day since above left). Right: a few minutes later the Sun is on the local meridian again. There has been a solar day since above left. (from Wikipedia) As you can see, the sidereal day is the time that a planet takes to do exactly one rotation around its rotation axis, whereas the solar day is the time between the moment of two consecutive days when the Sun (or the planet's star) is the higher in the sky. So the question is, how do you calculate the length of the sidereal day of a planet, if we know the length of its year in days (Earth is 365.26 days) and the length of its day? Try to guess! Also please put your explanations, if you post any, in spoilers.- 1 reply
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It's not effective, either to have a single gigantic tank for Tylo and back, nor having two hundred separate stages for a trip to Mun. Is there a formula to calculate the minimum fuel to dead weight ratio for each stage in order to have a net delta-v gain for adding that stage?
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Hey there, I am new at asking questions so please be gentle. I am a PS4 KSPEE player and I am trying to perfect my landing on the launch pad, now with that being said it is going to require allot of math and I just don't know the formula, I was thinking about how it should include the TWR, the weight of the object being landed, how quick the fuel is being drained, it is kind of like the rocket equation but with added steps and it will lead to a different outcome, if there is someone who could make a calculator I know that not only I will appreciate it but so will the KSPEE players and the stock KSP players alike. Thanks everyone!
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Hello, this is my inaugural post on the KSP forum. To learn some more physics and calculus, I'm trying to create an analytical equation for the path of a solid fuel model rocket fired vertically. I first made an equation assuming no atmosphere and no orbital mechanics, which I am satisfied with. I'm currently making an equation that accounts for drag, and assumes there is no change in atmospheric density and no wind. The equation I am using is from Wikipedia, specifically vertical motion upward and vertical motion downward. I am not sure how to adapt this equation to work while the thrusters are still active. If anybody can help me with this, I would be extremely grateful. The work I have done so far is here: https://www.desmos.com/calculator/ncmd38rosu The Variables folder contains all variables, the No Drag folder contains a complete equation that I have made personally, and the drag folder contains what I have done so far to account for drag. I am more than happy to explain my thought process/reasoning on how I have come up with what is on there so far. Thanks, and I look forward to spending more time with the KSP community. -
How to calculate dV for other planets?
fozba posted a topic in KSP1 Gameplay Questions and Tutorials
Hello guys. I am an amateur Kerbonaut and I want to start to calculate dV by hand since it is so nice and fancy to do. When I looked up, I came across this formula: dV = Isp * gravity * ln(m0 - mf) Everything is fine, but when I utilize this equation and check the results with VAB, I get HUGE differences for other planets. Currently I am trying to visit Eve and comeback. My lander should have God knows how much dV. So, for a stage (mid), I put: Rockomax 32 (x1) FL-A215(x1) FL-A151S(x1) Skipper The upper payload is 4.090t. Therefore, according to the equation: Isp = 280 Gravity = 16.7 m0 = 32.740t mf = 9.940t and dV should be 280 * 16.7 * ln(32.74/9.94)= 5579.9 m/s but VAB says it is 666m/s. What I am doing wrong? Good luck in your space journeys
