I made a stable spaceplane using stock parts I call it the Falcon MK I it needs some more tinkering to work better for interplanetary travel Entering orbit 2 Docked at the mun refueling station Equipped with an interplanetary atom engine attachment connected via docking port On a collision course with laythe at 4600 m/s >< had just enough fuel with all engines running to stop it from hitting the moon at 100 meters above the ocean I then flew to one of the large land masses with a giant lake in the middle to land, she felt kinda floaty and much less stable with most of the fuel tanks on empty. Bill safely on laythe