Okay, It barely made an orbit on Kerbin with nukes & aerospikes configuration. So it seems that it's nearly impossible to make propeller planes get to orbit. But there's more configurations to test: 1. Nukes & Vectors     The boost stage needs more TWR to go up faster, so Vectors should be better for this. 2. Nukes only     As spaceplanes can fly in the denser atmosphere with lower TWR, it could be better to optimize the plane for nukes.    Inste