How to find thrust of a rocket engine without F=ma

@ninwithabin i'm not entirely sure thats possible

@Staticalliam7 the first one

@ninwithabin are you doing this just to see if there are any other weird alternatives to F=ma or do you have some sort of aversion to it?

@Staticalliam7 i want to learn the equation just for fun.

@ninwithabin you need to be more specific. If you want to know the general thrust of the engine, just use the performance screen

@Staticalliam7 i wanted to know the answer because i wanted to calculate it without launching the rocket, bot because im lazy. So whats the equation?

@Staticalliam7 what is the equation for it without doing F=ma??

This is rocket science, you gotta do the math the hard way

you... don't?

@YaMomzBox420 ik all those stuff i just wanna know the equation

i don't know why you wouldn't want to just use this equation.

Unfortunately, there's no easy way to do that accurately. There's a (current thrust) block, but it only works when the current stage is active and won't work for the next stage(s) until they're activated. There's also a (max thrust) block, but it also only works with the current active stage. Neither of these help much if you have multiple engines per stage without some more math to figure out thrust per engine. Of course, none of this makes a difference if you need to perform the calculations before you launch, as opposed to after.

Otherwise, your only choice is to work out the math behind it, which requires a lot more than just F=ma since you have to know stuff about the engine's flow rate, nozzle ratio, and so on just to calculate the acceleration value necessary for the thrust equation(trust me, I'm working on exactly this problem at the moment, and it's not easy, but it is rocket science after all).

XP

@SamTheFox ty

I think you can check a crafts performance in the designer.
It accounts for the entire craft and all of its Active Stages.
You may be able to place a single engine with fuel and then check its thrust in performance that way.

you cannot avoid math in rocketry, it’s impossible

try math tutorials on youtube, they helped me create an orbital velocity calculator

or just try to lock an engine on a fuel tank on the ground and analyze the acceleration before the actual mission, then multiply that by the mass of the craft