Rolls-Royce BR700
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The BR700 family of engines was developed by BMW and Rolls-Royce plc through the joint venture company BMW Rolls-Royce to power regional and corporate jets. Rolls-Royce took full control of the company in 2000 and is now known as Rolls-Royce Deutschland.
The company was established in 1990 and the first engine run (BR710) took place in September 1994.
[edit] Variants
| BR710 Family Specifications | ||||||||
|---|---|---|---|---|---|---|---|---|
| BR710-48 | BR715-58 | |||||||
| Thrust (lb) | 14,750 | 18,500-22,000 | ||||||
| Dry Weight (lb) | 4640 | 6155 | ||||||
| Overall Length (in) | 201 | 231 | ||||||
| Fan Diameter (in) | 48.0 | 58.0 | ||||||
[edit] BR710-48
The BR710, 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, will shortly enter service in the RAF Nimrod MRA4s.
Comprises a 48in diameter single stage fan, driven by a 2 stage LP turbine, supercharging a 10 stage HP compressor (scaled from the V2500 unit) and driven by a 2 stage, air-cooled, HP turbine.
[edit] BR715-58
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 spool, comprising a 58in diameter single stage fan, with 2 stage LP compressor driven by a 3 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.
