The overall flight profile, though extended, will mimic that of SS1. The enormous WK2 mothership-which will be larger than a 757 and have a cabin identical to SS2, permitting the aircraft to be used as a training vehicle for the Virgin Galactic passengers-will carry the 60-foot-long SS2 to 10 miles above sea level, about 50,000 feet, and release it. SS2´s hybrid motor will then ignite, accelerating passengers at four Gs to three times the speed of sound. For reentry, SS2´s wings will pitch upward, â€featheringâ€ in a shuttlecock formation to automatically position the ship for the steep descent. At 70,000 feet, the wings will return to a horizontal glide formation for the runway landing.