Though the OEV was an Orbital Examination Vehicle, the design specifics were impossible to use, due to the lack of actual “variable-geometry intake ramjet-scramjet & rocket engines,” we used a pulse-jet engine instead. Hey, at least it can lift off without a rocket assist! Even though it can’t burn rocket fuel mixtures required for orbital insertion (which was the main selling point,) we have found that this vehicle looks undeniably cool. It does, however, lack ailerons, using canards and winglets instead. With that in mind, don’t try to turn the control surfaces too quick, except in emergency situations. It has air-cooled coolant tubes on the vehicle (with regenerative fueling tech, of course) to make engine overheat a thing of the past, by passing the fuel in a coil around the engine and then in tubes om the top of the craft, before being sent into the engine for combustion.