My idea is to create a ship that can either have permanently mounted engines, or a way to rotate engines for station keeping in a planetary or moons gravity field! Note I the vessels designed using bits from the B9 pack and kw rocketry, it's also about 400-500 tons in weight, I realize that the bottom engines are going to have to be awfully powerful......... I got it into orbit using ADVANCED RADIAL NACELLE ENGINE mod, thinking of using them for it's station keeping but I'd rather have them able to rotate than having four 10ton engines permanently mounted in the down position..... Here's some pics of the general hull it's going to be implemented Second one is on it's dark side, same craft.....