Rolls-Royce BR700

[3] The BR710 is a twin shaft turbofan, and entered service on the Gulfstream V in 1997 and the Bombardier Global Express in 1998.

This engine has a thrust-specific fuel consumption (TSFC) of 0.39 lb/(lbf⋅h) (11 g/(kN⋅s)) at static sea level takeoff and 0.64 lb/(lbf⋅h) (18 g/(kN⋅s)) at a cruise speed of Mach 0.8 and altitude of 35,000 ft (10,668 m).

However, a larger fan is required, to keep the specific thrust low enough to satisfy jet noise considerations.

This engine has a TSFC of 0.37 lb/(lbf⋅h) (10 g/(kN⋅s)) at static sea level takeoff and 0.62 lb/(lbf⋅h) (18 g/(kN⋅s)) at a cruise speed of Mach 0.8 and altitude of 35,000 ft (10,668 m).

The HP axial compressor benefits from three-dimensional aerodynamics for greater efficiency and has 10 stages including five blisks to reduce weight.

The two-stage HP turbine has blade active tip-clearance control for more efficiency; 3D aerodynamics reduce the cooling air flow.

[10] On 24 September 2021, the United States Air Force (USAF) selected the F130 (the US military designation for the BR725) for the B-52H Stratofortress Commercial Engine Replacement Program (CERP).

[11] This version has 17,000 lbf (75.6 kN) thrust, similar to the existing engines (Pratt & Whitney TF33).

[13] The CERP engines will be built at Rolls-Royce North America's plant in Indianapolis, Indiana,[14] The Advance 2 development effort inserts new, advanced technology into existing 15,000 lbf (67 kN) class BR710 and the larger BR725 engines.

It was undergoing flight tests in May 2018 for an end of 2019 planned entry into service aboard the Bombardier Global Express 5500 and 6500 developments.

[20] The enhanced 3-stage LP turbine with advanced high temperature materials, advanced segments and seals allow for higher pressures and temperatures and the new low emissions cooled combustor includes a new tiled combustion chamber.

[23] The Advance2 core and new low-pressure system allows 5% more efficiency than the previous Rolls-Royce business jet engines.

A G550 in front of a Bombardier Global Express : the BR710 main applications
A BR715 engine on a Boeing 717 of Volotea
The BR725 powers the Gulfstream G650
Pearl 15