Design more efficient landers! Mobile friendly! http://teoryn.github.io/rocketcalc/ This finds the optimal configurations of engines for single stage rockets, including the possibility of mixing types of engines, thrust limiting on lower Isp engines, and shutting down the low Isp engines once they aren't needed to maintain the required thrust-weight ratio. Multiple solutions can be given based on the least fuel burned, lowest wet mass, etc. Source on GitHub Copyright © 2014 Kevin Stock, MIT License