The B-377PG Pregnant Guppy was followed by an even larger B-377SG Super Guppy: this featured not only an outsize fuselage, with a cargo compartment measuring 33.17m in overall length, 7.62m in width, and 7,77m in height, but also an increased wing span and four 5220kW turboprop engines. This Super Guppy was also used in the American space programme, it being the only aircraft able to carry the third stage of a Saturn V launch vehicle, and the Lunar Module adapter.