So just playing around I built the biggest most op spaeplane using this pack and procedural wings. Not sure how much payload she can take to orbit... but its a lot. Going to redesign with engine pod placement so I can get a more favorable weight distribution to make it easier to land and take off She hits 500 m/s on the run way lol No big deal, 1000 m/s at 9000 meteres with a 45 degree angle of pitch and still accelerating at almost 42 m/s/s!! lol. She hit a 70000 meter sub orbital altitude without having to close cycle the engines. Orbital burn