Hi! First post on the forum (besides the introductory one ) I was wondering, is there a way to do mass relays that launch a small spaceship into a transfer window? Cause I'm tired of planning and doing calculations and then having a failed mission xD Also I only use stock so I don't have things as kerbal engineer or mechjeb (I like to play it like that) The final idea is to have two kerbalian mass relays, one in kerbin, and the other in duna. The small spaceship goes into the mass relay, and travels into duna. then it uses the duna one to get back into Kerbin. I'm doing one already for fun, with kerbodyne engines What do you think? It is possible? Or I'll need like 20 engines to achieve the necessary delta v?