Gulfstream G650 first flight using electrical fly-by-wire backup


Very few G650 buyers are actually speculating on their orders.

 Gulfstream’s G650 test aircraft becomes the first business jet to ever use an electrical fly-by-wire system.

Gulfstream’s fly-by-wire architecture uses electrically controlled actuators to offer electric power as a backup.

A Gulfstream G650 flight test aircraft flew a total of three hours and 33 minutes on 21 December 2010, flying two hours and 20 minutes using an electrically powered, fly-by-wire backup flight control actuation system.

This was the first time ever that this system had been used by itself on any business aircraft. During the flight the aircraft performed five landings with the backup system engaged.

Typically, fly-by-wire uses a third hydraulic system to provide redundancy in the event of a dual hydraulic system  failure. However, Gulfstream’s fly-by-wire architecture uses electric backup hydraulic actuators (EBHA): electrically controlled actuators that are
primarily hydraulically powered but offer electric power as a backup. A self-contained hydraulic reservoir and motor pump allow full operation should hydraulic loss occur.

The EBHAs for the Gulfstream G650 are provided by Parker Hannifin.

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