2 solid rocket boosters along with the 3 main engines help this craft, such as the Atlantis, go 3,000 mph
... the shuttle itself), (2) the three main engines integral to the orbiter, (3
) the ... the orbiter's three engines during liftoff, and (4) two solid-fuel rocket 
boosters... [DOC] [TLE] Columbia's Last Flight - The Atlantic [PAR] Along the route, however, stood small numbers of shuttle enthusiasts, who had .... 
Kling's informal model of catastrophe had predicted just such indications, .....