Re:How about some solutions? (Score 1)

There are no Booster tank engines. The devices you are talking about are two strap on solid rocket boosters. There are entirely self contained, with thier own internal solid fuel. They one single use rockets, not enitrely unlike a giant bottle rocket. The Big external tank provides fuel to the shuttles main engines (The four nozzles at the tail of the shuttle) which provide over half of the thrust needed to get into orbit.