To power the SB-7, it sports 6 counterrotating turboprop engines along with 4 Jet engines which aid takeoff and low- -medium altitude flying (jets can be safely turned d off at 20,000 ft). The top speed of this aircraft at sea level is about 275 mph, while this speed increases to around 600 mph at 30,000 ft without the aid of jets. Thus, efficiency is greatly improved at 30,000 ft due to the large drag reductions.
So, what does the SB-7 bring to the table aside from taking up lots of space and being complicated to fly? Well, it brings 12 x Boom 50’s to the table. Which is enough to completely wipe out a runway, a task which most realistically built aircraft on SP cannot achieve.