Rolls-Royce BR715
| BR700 series | |
|---|---|
 |
|
| Rear view of a BR710 | |
| Type | Turbofan |
| Manufacturer |
BMW Rolls-Royce Rolls-Royce Deutschland |
| First run | 1994 |
| Major applications |
Bombardier Global Express Boeing 717 Gulfstream V |
The Rolls-Royce BR700 family of engines powering regional jets and corporate jets. It was developed by BMW and Rolls-Royce plc through the joint venture BMW Rolls-Royce AeroEngines GmbH, established in 1990. The engine first ran in September 1994 (a BR710) and is manufactured in Dahlewitz, Germany. Rolls-Royce took full control of the company in 2000, which is now known as Rolls-Royce Deutschland.
The BR710 is a twin shaft turbofan, entered service on the Gulfstream V in 1997 and the Bombardier Global Express in 1998. This version has also been selected to power the Gulfstream G550.
Another rerated version, with a revised exhaust system, was selected for the now cancelled Royal Air Force Nimrod MRA4s.
The BR710 comprises a 48-inch-diameter single-stage fan, driven by a two-stage LP turbine, supercharging a ten-stage HP compressor (scaled from the V2500 unit) and driven by a two-stage, air-cooled, HP turbine.
The BR715 is another twin-shaft turbofan; this engine was first run in April 1997 and entered service in mid-1999. This version powers the Boeing 717.
A new LP spool, comprising a 58-inch-diameter single-stage fan, with two-stage LP compressor driven by a three-stage LP turbine, is incorporated into the BR715. The HP spool is similar to that of the BR710.
The IP compressor booster stages supercharge the core, increasing core power and thereby net thrust. However, a larger fan is required, to keep the specific thrust low enough to satisfy jet noise considerations.
The BR725 is a variant of the BR710 with a three-stage-axial flow low pressure turbine to power the Gulfstream G650. The engine has a maximum thrust of 17,000 pounds-force (75.6 kN).
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