The Bell 525 Relentless is an American medium-lift helicopter, under development by Bell Helicopter.
Bell 525 Relentless
Design and development
The Bell 525 is being developed to meet a requirement for a medium-lift helicopter. It will be constructed primarily from composites and metal and is to be the first commercial helicopter to incorporate fly-by-wire flight controls, with tactile cues. The system is triple redundant, and is developed in two simulator environments. The 525 is powered by a pair of GE CT7-2F1 turboshaft engines, with a new composite five-blade main rotor system. The cost of the 525 has not yet been determined, but it is expected to be cost competitive on missions between 50 and 400 nmi, performed by helicopters such as the AgustaWestland AW139 and Sikorsky S-92.
The Bell 525 is designed to fit the emerging "Super-Medium" size category suited ideally to support offshore oil and gas operations, with 50% of the customers coming from that sector. Helicopters under development in the same class are the Airbus Helicopters H175 and the AgustaWestland AW189. The Bell 525's maiden flight was planned for late 2014. PHI, Inc. is the launch customer for the type
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The website for the Bell 525 states on its homepage that it is designed for "up to 20 passengers", but the only further reference to the passenger configuration states " . . offers fully flat cabin floor highly configurable with 16 seats in a standard OGP-compliant layout." In February 2018 the company stated it was capable of carrying 19 passengers, more than any existing super-medium-segment at that time.
The 525 is to be certified in Category A Takeoff class, at maximum gross weight. This involves being able to continue a takeoff (or landing) after one of the helicopter's two turbine engines fails at any point.
Bell 525 Relentless
The Bell 525 Relentless, featuring the ARC Horizon flight deck system, provides unparalleled crew situational awareness through the use of a fully integrated avionics flight deck coupled with an advanced fly-by-wire flight control system, resulting in enhanced safety levels and mission capabilities.
Bell 525 Relentless: See below
Role Medium-lift utility helicopter
National origin United States
Manufacturer Bell Helicopter
First flight 1 July 2015
Status Under development
Crew: one or two
Capacity: 16 or 20 passengers ; 8,200 pounds (3,700 kg) useful load
Gross weight: 20,500 lb (9,299 kg)
Max takeoff weight: 20,500 lb (9,299 kg)
Fuel capacity: 2,400 liters (530 imp gal; 630 U.S. gal)
Powerplant: 2 × General Electric CT7-2F1 turboshaft, 1,800 shp (1,300 kW) each
Maximum speed: 190 mph; 306 km/h (165 kn)
Cruise speed: 178 mph; 287 km/h (155 kn)
Range: 575 mi; 926 km (500 nmi) with a 1,530 pounds (690 kg) payload
Service ceiling: 20,000 ft (6,100 m) with 12,000 ft (3,700 m) hover in ground effect, 6,000 ft (1,800 m) HOGE
The Bell 525 Relentless is an American medium-lift helicopter, under development by Bell Helicopter. The Bell 525 was unveiled at the 2012 Heli-Expo in Dallas, Texas in February 2012. The helicopter first flew on 1 July 2015. It is designed to transport up to 19 passengers