| 词条 | Bentley BR2 | ||||||||||||||
| 释义 |
The Bentley B.R.2 was a nine-cylinder British rotary aircraft engine developed during the First World War by the motor car engine designer W. O. Bentley from his earlier Bentley BR.1. Coming as it did near the end of the war, the BR.2 was built in smaller numbers than the earlier BR.1 – its main use being by the Royal Air Force in the early 1920s.[1] Design and developmentThe initial variant of the BR.2 developed {{convert|230|hp|kW}}, with nine cylinders measuring {{convert|5.5|x|7.1|in|mm}} for a total displacement of 1,522 cubic inches (24.9 L). It weighed {{convert|490|lb|kg}}, only {{convert|93|lb|kg}} more than the Bentley B.R.1 (A.R.1). This was the last type of rotary engine to be adopted by the RAF – later air-cooled aircraft engines such as the Cosmos Jupiter and Armstrong Siddeley Jaguar being almost entirely of the fixed radial type. With the BR.2, the rotary engine had reached a point beyond which this type of engine could not be further developed, due to its inherent limitations.[2] ApplicationsThe type selected as the standard single-seat fighter of the post-war RAF, the Sopwith Snipe, had been designed around the BR.2, as had its ground attack version, the Sopwith TF.2 Salamander. A number of other experimental and minor production types were either designed for, or otherwise fitted with this power plant during the late "war" years and into the early 1920s.
Variants
1918, 230 hp.
1918, 245 hp. Engines on displayA Bentley BR.2 is on public display in the Science Museum (London), another forms part of the aero engine collection at the Royal Air Force Museum Cosford. A ¼ scale working replica of the Bentley BR.2 World War I rotary aero engine built by Lewis Kinleside Blackmore is currently on display at the Bentley Memorial Building in Oxfordshire, UK. This was the first model built of this engine and is the subject also of a book by L K Blackmore. The Canada Aviation and Space Museum in Ottawa, Ontario, Canada has a BR.2 installed in their Sopwith 7F.1 Snipe. Specifications (BR.2){{pistonspecs||ref=Jane's [3] |type=9-cylinder rotary |bore=5.51 in (140 mm) |stroke=7.09 in (180 mm) |displacement=1521.8 in (24.94 L) |length= |diameter= |width= |height= |weight=490 lb (220 kg) |valvetrain=Overhead valve |supercharger= |turbocharger= |fuelsystem= |fueltype= |oilsystem= |coolingsystem=Air-cooled |power=250 hp |specpower= |compression= |fuelcon=20 gallons per hour |specfuelcon= |oilcon=16 pints per hour |power/weight=0.5 hp/lb |designer= |reduction_gear= |general_other= |components_other= |performance_other= }} See also{{aircontent|see also= |related=
|similar aircraft= |lists=
|similar engines=
}} ReferencesNotes1. ^Lumsden 2003, p.88. 2. ^Gunston 1989, p.22. 3. ^Jane's 1993, p.274. Bibliography{{refbegin}}
External links{{Commons category|Bentley BR2}}
3 : Rotary aircraft piston engines|Air-cooled aircraft piston engines|Aircraft piston engines 1910–1919 |
||||||||||||||
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。