silverpelican wrote:
It's lift that keeps aircraft up and reverse lift that allows them to fly upside down. Gliders don't even have engines and stay up for hours depending on skill of the pilot. OTOH, lack of lift, natural lift, can be compensated by velocity of the aircraft, whence the space shuttle.
Yes, strap a couple of Atlas IV rockets to a house, and you could shoot a house into orbit, (if it was built structurally sound enough, and you had enough thrust). However, when the space shuttle re-enters the earth's atmosphere, it acts as a glider. (In fact, it is designed to glide). If the space shuttle didn't need to navigate to a landing site, there would be little need for the tail and wings. If simply landing without navigation after a mission was the goal, the crew capsules of the Apollo era would have sufficed, (splash down in the pacific ocean). The Russians don't have a shuttle program; their cosmonauts return in the Soyuz capsule, (and the Russians don't splash down, they usually set down in Kazakhstan, (on land).