The fourth Gulfstream G650 has joined the flight test program for the company's newest ultra-long-range jet.
This aircraft will be the first to be fitted with a full interior to evaluate the cabin systems and it will eventually be sold.
The G650 flight-test program involves an estimated 1800 hours of flight and a specific purpose for each of five aircraft.
S/N 6001 is focused on envelope expansion, air data calibration, flutter, in-flight performance and flight controls. S/N 6002 is used to evaluate the aircraft’s systems, while S/N 6003 tests the avionics, in-flight load measurement and ice protection system. S/N 6005, which has been turned over to the Flight Test department for outfitting, will participate in the reduced vertical separation minimum testing.
The G650 flight-test program officially began on November 25, 2009. Through June 20, the four aircraft currently in the program have completed more than 85 flights and 240 flight-test hours.
Ultimate load testing of the aircraft’s primary structural components has also begun. In April, the aircraft completed the structural limit load testing required by the FAA and the European Aviation Safety Agency. The limit load represents the maximum load the aircraft should experience during its life cycle. Ultimate load is 50 percent more than limit load. Ultimate load testing will be performed on the fuselage, wing, vertical and horizontal stabilizers, nose landing gear and all control surfaces.
The G650 has also flown at its maximum takeoff weight of 45,177 kg and recently reached its maximum operational Mach number of Mach 0.925 at 42,500 feet.
Gulfstream says that the G650 offers the longest range at the fastest speed in its class. Powered by best-in-class Rolls-Royce BR725 engines, the business jet will be capable of traveling 7000 nautical miles.
Gulfstream announced the G650 program on March 13, 2008. On Sept. 29, 2009, the aircraft rolled out under its own power in front of a crowd of more than 7000 people. The aircraft is expected to receive certification from the FAA and EASA in 2011. It is on schedule to enter service in 2012.