G650 and G250 enter into final flight test phase

Gulfstream Aerospace announced that its newest, biggest offering—the large-cabin G650—continues to make progress toward its anticipated 2012 certification.

Four airplanes are now in the final phases of flight test, and the airplane’s predicted range performance ( 5,000 nautical miles at normal cruise power; 7,000 nm at long-range cruise power) has been confirmed. In addition, an electrically-powered backup flight control system has been successfully demonstrated. This system provides a third source of control, in the extreme unlikelihood of a failure of the flight control system’s dual, hydraulically powered actuators.

Some 600-plus G650 test flights have been flown, totaling 2,077 flight hours, a Gulfstream spokesman said. So far, the maximum speed obtained by the G650 was 0.995 Mach; maximum altitude was 55,000 feet.

In G280 news, Gulfstream said that flight tests of the Israel Aerospace Industries-partnered, eight-seat, 7,446-lbst Honeywell HTF7250G twinjet are almost complete. Those tests yielded unexpected benefits. The airplane’s four-passenger range, once advertised as 3,400 nm at 0.80 Mach, has been extended to 3,600 nm. Moreover, the G280’s balanced field length proved to be 4,750 feet—210 feet shorter than originally posted. Certification of the G280 is expected later this year.

(Gulfstream Aerospace)