The 747SP's track bogie centres is 11m. The airport is at around 5,000ft altitude, for which Boeing manuals recommend a minimum field length of 1,800m. However, the aircraft was light on fuel.

The GTF demonstrator amassed 43.5h over 12 flights that demonstrated the handling characteristics and overall performance of the engine up to 40,000ft (12,200m) and Mach 0.85, exploring the full ...