SiroVai

Ok great, thank you for the reply. So really in a vacuum, the mass doesn't matter as much. With a smaller motor it will take longer, but still eventually get up to speed. Compared with a larger motor, makes sense. Now I've seen the delta-v maps out there. Is there a 0.21.1 mod that people commonly use to workout their rockets potential delta-v? I haven't tried landing on a planet with an atmosphere yet, but I see that aero breaking is pretty much essential as to stop the use of fuel to slow down. It seems pretty straight forward, just aim my trajectory for an altitude that's within the planets atmosphere and hope for the best? Are there any tips for this? Say a planet has an altitude of 70k. Where would I aim my initial trajectory to slow down sufficiently, or to a good amount to enable capture or minimal decelleration fuel consumption? Thanks!

Hi, So I want to build a inter-planetary vessel. How do I work out the best type and number of engines to use? I know I would have to take into account the mass of the rocket, thrust of the engine and the fuel efficiency. So for example, I could use a mainsail with a high thrust but low efficiency. Or I could replace it with a number of atomic motors. How would I work out how many atmoics I would use and if that's more efficient than a single larger engine? Thanks