Well, I have an ssto, made to be just like skylon, it consists of, from the center of the craft, symetrically going towards each end, a mk2 crew cabin, 2 mk 2 lfo shorts, two probe cores, two mk2 to 1.25 long adapters, then two reaction wheels, and finally two ncs adapters with nosecones attatched, and for wings, standard delta wings in the middle, where the rapiers, preecooler ands shock cone intake are like skylon. And it als has two canards at the front, and one rudder. This should fly great I thought. But no. It cannot get even to 400m/s! Useless! Two rapiers spaceplanes can't fly anymore. I could just add another but then it would not be skylon! Seriously it would easily beable to go atleast 1300m/s before flameout... Personally I cannot understand why squad messed up the drag so badly that even a realistic design like that sucks. Either that or airbreathing engines at the current time do not produce enough thrust in subsonic and transonic flight... I played with FAR before for a while and it looks like I'm going straight back to it when NuFAR comes out. Or is NuFAR out?. Anyway... Point is, with this hot"fix" one cannot make a reasonable ssto with 2 or less rapier engines