35:
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323:
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458:
In service the
Pegasus was generally reliable with the exception that the valves were prone to failure. The valves were operated by rocker-boxes, which were lubricated by oil pads on the top of the cylinder heads. In hot climates the lubrication deteriorated which could lead to seizing of the valves.
333:
The
Pegasus was the same size, displacement and general steel/aluminium construction as the Jupiter, but various improvements allowed the maximum engine speed to be increased from 1,950 to 2,600 rpm for take-off power. This improved performance considerably from the Jupiter's 580 hp
459:
Also if a problem developed with the engine and the pilot shut it down it was not possible to "feather" the propeller and so it would continue to rotate creating drag and continue to turn the engine which had no lubrication being forced through it by the oil pump.
311:. The power of a piston engine can be calculated by multiplying the charge per cylinder by the number of cycles per second; the Mercury improved both and thereby produced more power for a given size. The primary advantage was a much improved
467:
The
Pegasus was produced in many variants, early prototype engines were unsupercharged but the majority used a geared supercharger, either single-speed or two-speed. Variant differences included
221:, both types being produced in limited numbers. In contrast, by the end of production over 30,000 Pegasus engines had been built. Aircraft applications ranged from single-engine
1413:
Allied
Aircraft Piston Engines of World War II: History and Development of Frontline Aircraft Piston Engines Produced by Great Britain and the United States During World War II
2390:
1880:
1478:
816:. An unrestored Pegasus recovered from the sea bed is in the care of the Bristol Aero Collection, which is closed while moving from Kemble Airport to Filton.
2026:
2400:
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1873:
303:. Although having a capacity (25 L) almost 15% smaller, the Mercury produced about as much power as the Jupiter, through a combination of
831:
As of
October 2010 two Bristol Pegasus engines remain airworthy in England. They power the two Fairey Swordfish aircraft operated by the
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965 hp (720 kW) at 2,600 rpm at 13,000 ft (4,000 m), maximum power (emergency combat - 5 minutes only)
953:
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built both the
Jupiter (126-RC35) and the Pegasus under licence, with the engine based on the Pegasus designated as the
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fuel. This gave rise to the claim "one pound per horsepower" reflecting the excellent power-to-weight ratio.
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835 hp (623 kW) at 2,250 rpm at 8,500 ft (2,600 m), maximum continuous climb power
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List from
Lumsden (British aircraft only), the Pegasus may not be the main powerplant for these types
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Approximately 32,000 Pegasus engines were built. The
Pegasus set three height records in the
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with 635 hp (474 kW), to 690 hp (510 kW) in the first production model
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275:(became Navy Wings in March 2019); other examples are preserved and on public display in
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took over that company. Two
Bristol Pegasus engines remain airworthy in 2010, powering
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engines, later variants could produce 1,000 horsepower (750 kilowatts) from its
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World
Encyclopedia of Aero Engines: From the Pioneers to the Present Day
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to improve the "charge", and various changes to increase the operating
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Bristol Pegasus engines can be viewed installed in aircraft at the
397:. Like the Jupiter before it, the Pegasus was also licensed by the
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321:
46:. The red circles are temporary blanking plates removed when the
16:
For the vectored-thrust engine produced by Bristol Siddeley, see
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443:: in 1932, 1936 and 1937. It was used for the first flight over
2008:
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1460:
1034:
965 hp (720 kW) at 2,475 rpm for takeoff at sea level
346:
with 1,010 hp (750 kW) thanks to the two-speed
1164:
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451:, and in 1938 set the world's long-distance record in
1415:. Warrendale, Pennsylvania: SAE International, 1995.
847:
Bristol Pegasus engine with some components labelled
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939:-actuated valves per cylinder â two intake and two
471:, propeller reduction gear ratios and accessories.
169:is a British nine-cylinder, single-row, air-cooled
1239:Flying Boats: My Father's War in the Mediterranean
1241:. London: Victoria University Press. p. 50.
868:9-cylinder, single-row, supercharged, air-cooled
251:company reused the name many years later for the
244:records were set by aircraft using the Pegasus.
207:Further developments of the Pegasus created the
1433:Bristol Pegasus at the Bristol Aero Collection
1397:. Marlborough, Wiltshire: Airlife Publishing.
299:, using lessons learned in development of the
2020:
1874:
1472:
8:
424:with the civil version as the 126-RC10. In
42:Preserved Bristol Pegasus on display at the
988:with one combination pressure/scavenge pump
361:Some notable users of the Pegasus were the
2027:
2013:
2005:
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1206:Walter engines history - Walterengines.com
819:There is also an engine on display at the
2391:Aircraft air-cooled radial piston engines
1438:Bristol Pegasus use in altitude record -
1395:British Piston Engines and Their Aircraft
1382:. Cambridge, UK. Patrick Stephens, 2006.
1368:. 5th edition, Stroud, UK: Sutton, 2006.
1348:Jane's Fighting Aircraft of World War II
1224:
1301:
1168:
1158:
1270:
24:
1283:Royal Navy Historic Flight - Aircraft
7:
898:1,753 cu in (28.73 L)
342:, and eventually to the late-model
1453:article on the Pegasus and Mercury
1380:Development of Piston Aero Engines
14:
287:The Pegasus was designed by Sir
33:
1018:three-blade with variable pitch
839:Specifications (Pegasus XVIII)
259:and which became known as the
1:
2401:1930s aircraft piston engines
1331:. London: Putnam Publishing.
1067:0.52 lb/(hp·h) (319 g/(kW·h))
954:centrifugal type supercharger
810:Royal Air Force Museum London
1517:Horizontally opposed engines
1073:0.28 oz/(hp·h) (11 g/(kW·h))
910:55.3 in (1,400 mm)
334:(430 kW), to the first
326:Bristol Pegasus fitted to a
1329:Bristol Aircraft Since 1910
919:1,111 lb (504 kg)
814:Imperial War Museum Duxford
2417:
1292:Retrieved: 13 October 2010
1125:Pratt & Whitney R-1690
904:61 in (1,500 mm)
880:5.75 in (146 mm)
833:Royal Navy Historic Flight
617:Handley Page H.P.54 Harrow
373:. It was also used on the
273:Royal Navy Historic Flight
200:(28 L) by use of a geared
15:
1503:Bristol Aeroplane Company
1346:Bridgman, L, ed. (1998).
1063:Specific fuel consumption
889:7.5 in (190 mm)
293:Bristol Aeroplane Company
271:aircraft operated by the
182:Bristol Aeroplane Company
72:Bristol Aeroplane Company
41:
32:
27:
2396:Bristol aircraft engines
2046:License produced engines
1215:Retrieved: 3 August 2009
1142:List of aircraft engines
291:as the follow-on to the
1288:29 October 2017 at the
1082:0.86 hp/lb (1.42 kW/kg)
860:General characteristics
532:Boulton Paul Sidestrand
527:Boulton Paul Overstrand
257:Hawker Siddeley Harrier
1393:Lumsden, Alec (2003).
848:
682:Savoia-Marchetti SM.95
522:Boulton Paul Mailplane
486:
330:
283:Design and development
1447:"Improving the Breed"
1327:Barnes, C.H. (1970).
1078:Power-to-weight ratio
1049:0.55 hp/inÂł (25 kW/L)
846:
797:Westland-Houston PV-3
712:Supermarine Stranraer
482:
432:and was known as the
405:. It was used on the
325:
317:volumetric efficiency
313:power-to-weight ratio
1237:Frame, Alex (2007).
687:Short Mayo Composite
612:Handley Page Hampden
225:to the four-engined
110:Handley Page Hampden
1182:"Alfa Aero Engines"
1092:Related development
607:Handley Page H.P.51
602:Handley Page H.P.47
597:Handley Page H.P.43
422:Alfa Romeo 126-RC34
350:(introduced on the
295:'s very successful
261:Rolls-Royce Pegasus
255:engine used in the
18:Rolls-Royce Pegasus
1211:9 May 2008 at the
1119:Comparable engines
849:
804:Engines on display
772:Vickers Wellington
757:Vickers Vildebeest
717:Supermarine Walrus
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469:compression ratios
453:Vickers Wellesleys
367:Vickers Wellington
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105:Vickers Wellington
87:Major applications
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1248:978-0-86473-562-1
1054:Compression ratio
1007:epicyclic gearing
821:Brooklands Museum
777:Vickers Wellesley
747:Vickers Viastra X
692:Short Sandringham
391:Vickers Wellesley
227:Short Sandringham
163:
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44:Brooklands Museum
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2039:aircraft engines
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782:Westland Wallace
767:Vickers Virginia
752:Vickers Victoria
727:Vickers Valentia
722:Vickers Type 253
697:Short Sunderland
642:Junkers Ju 86K-4
572:Fairey Swordfish
552:Bristol Type 138
547:Bristol Type 120
542:Bristol Type 118
507:Blackburn Baffin
449:Westland Wallace
441:Bristol Type 138
428:it was built by
395:Westland Wallace
371:Short Sunderland
363:Fairey Swordfish
328:Fairey Swordfish
277:aviation museums
269:Fairey Swordfish
249:Bristol Siddeley
143:
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100:Short Sunderland
95:Fairey Swordfish
88:
48:exhaust manifold
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1364:Gunston, Bill.
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1225:Bridgman (1998)
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1213:Wayback Machine
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1108:Bristol Phoenix
1103:Bristol Mercury
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992:Cooling system:
943:-filled exhaust
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787:Westland Wapiti
762:Vickers Vincent
647:Koolhoven FK.52
517:Blackburn Shark
512:Blackburn Ripon
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418:Alfa Romeo Avio
297:Bristol Jupiter
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219:Bristol Phoenix
167:Bristol Pegasus
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1304:, p. 112.
1302:Lumsden (2003)
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1273:, p. 242.
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1227:, p. 270.
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1171:, p. 104.
1169:Lumsden (2003)
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430:Walter Engines
426:Czechoslovakia
379:Bristol Bombay
315:due to better
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176:. Designed by
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1421:1-56091-655-9
1418:
1414:
1410:
1406:
1404:1-85310-294-6
1400:
1396:
1391:
1389:
1388:0-7509-4478-1
1385:
1381:
1377:
1375:
1374:0-7509-4479-X
1371:
1367:
1363:
1359:
1357:0-517-67964-7
1353:
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1338:0-370-00015-3
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1271:Barnes (1970)
1267:
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1199:
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1186:aroca-qld.com
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1137:
1136:Related lists
1131:
1130:Wright R-1820
1128:
1126:
1123:
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1120:
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1029:Power output:
1027:
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1017:
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1005:
1002:
1000:
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870:radial engine
867:
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838:
836:
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826:
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792:Westland PV.7
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748:
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742:Vickers Vespa
740:
738:
735:
733:
732:Vickers Vanox
730:
728:
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643:
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637:Junkers Ju 52
635:
633:
632:Hawker Osprey
630:
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623:
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445:Mount Everest
442:
437:
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431:
427:
423:
419:
414:
412:
408:
404:
400:
396:
392:
388:
384:
380:
376:
372:
368:
364:
359:
357:
353:
352:Pegasus XVIII
349:
345:
341:
337:
329:
324:
320:
318:
314:
310:
306:
305:supercharging
302:
298:
294:
290:
282:
280:
278:
274:
270:
266:
262:
258:
254:
250:
245:
243:
239:
235:
232:
228:
224:
220:
217:
213:
212:Bristol Draco
210:
209:fuel-injected
205:
203:
199:
195:
191:
187:
183:
179:
175:
172:
168:
156:
153:
151:
150:Bristol Draco
148:
147:
145:
140:
139:
136:
133:
128:
127:
123:
118:
117:
111:
108:
106:
103:
101:
98:
96:
93:
92:
90:
85:
84:
80:
77:
76:
73:
70:
68:Manufacturer
67:
66:
63:
60:
57:
54:
53:
49:
45:
40:
36:
31:
26:
23:
19:
2304:Super Castor
2199:V-12 engines
2082:
1994:Colombo S.63
1989:Colombo S.53
1893:aero engines
1848:Gordon Lewis
1682:Gyron Junior
1600:Sleeve valve
1579:
1495:aero engines
1450:
1439:
1412:
1394:
1379:
1365:
1350:. Crescent.
1347:
1328:
1321:Bibliography
1309:
1297:
1278:
1266:
1257:
1238:
1232:
1220:
1201:
1189:. Retrieved
1185:
1176:
1135:
1134:
1118:
1117:
1091:
1090:
1076:
1070:
1061:
1052:
1043:
1028:
1012:
997:
991:
982:
970:
959:Fuel system:
958:
948:Supercharger
946:
929:
913:
907:
901:
894:Displacement
892:
883:
874:
865:
854:
851:
850:
830:
818:
807:
707:Short Syrinx
702:Short Empire
662:PZL.23 KaraĆ
622:Hawker Audax
562:Fairey TSR I
557:Douglas DC-2
489:
488:
475:Applications
466:
457:
438:
433:
415:
407:PZL.23 KaraĆ
387:Short Empire
360:
351:
348:supercharger
344:Pegasus XXII
343:
339:
335:
332:
286:
246:
234:flying boats
206:
202:supercharger
198:cubic inches
166:
164:
120:Number built
22:
1731:Turboshafts
1661:(1959-1966)
1654:gas turbine
1509:(1920-1956)
1313:AIR 10/2008
1191:19 December
1023:Performance
983:Oil system:
966:carburettor
677:Saro London
652:Letov Ć -328
627:Hawker Hart
567:Fairey Seal
484:Saro London
401:company in
383:Saro London
340:Pegasus III
265:Rolls-Royce
174:aero engine
62:aero engine
2385:Categories
2352:Turboprops
1890:Alfa Romeo
1838:Roy Fedden
1727:Turboprops
1148:References
1013:Propeller:
994:Air-cooled
971:Fuel type:
964:AVT 95-MB
952:Two-speed
931:Valvetrain
924:Components
915:Dry weight
672:PZL.46 Sum
667:PZL.37 ĆoĆ
657:LWS-6 ƻubr
587:Fokker T.V
577:Fokker C.X
411:PZL.37 ĆoĆ
356:100-octane
336:Pegasus II
289:Roy Fedden
236:. Several
231:Sunderland
178:Roy Fedden
78:First run
50:is fitted
2324:Turbojets
2053:Jumo IV C
1974:Mercurius
1831:Designers
1673:Turbofans
1669:Turbojets
1617:Centaurus
908:Diameter:
852:Data from
827:Survivors
502:ANBO VIII
416:In Italy
413:bombers.
196:of 1,750
124:c.32,000
2211:Minor 12
1691:variants
1622:Hercules
1286:Archived
1209:Archived
1087:See also
986:Dry sump
855:Lumsden.
812:and the
463:Variants
393:and the
253:turbofan
242:distance
238:altitude
223:biplanes
214:and the
194:capacity
28:Pegasus
2294:Regulus
2284:Polaris
2206:Sagitta
2190:Minor 6
2185:Minor 4
2175:Major 6
2170:Major 4
2078:Mistral
2058:Jupiter
1984:RA 1050
1979:RA 1000
1964:Jupiter
1818:Stentor
1775:Ramjets
1765:Theseus
1760:Proteus
1712:Phoebus
1702:Pegasus
1697:Orpheus
1689: (
1687:Olympus
1632:Perseus
1585:Phoenix
1580:Pegasus
1570:Neptune
1565:Mercury
1560:Lucifer
1555:Jupiter
1488:Bristol
1449:a 1936
1009:, 0.5:1
937:pushrod
902:Length:
497:ANBO IV
447:in the
375:Anbo 41
301:Mercury
190:Jupiter
186:Mercury
180:of the
81:c.1932
2299:Scolar
2289:Pollux
2279:Mars I
2269:Castor
2254:NZ 120
2180:Mikron
2165:Junior
2113:W-VIII
2068:Merkur
2036:Walter
1808:BS.605
1750:Nimbus
1740:BS.360
1707:BS.100
1637:Taurus
1612:Aquila
1526:Cherub
1451:Flight
1442:, 1932
1440:Flight
1419:
1401:
1386:
1372:
1354:
1335:
1245:
1058:6.25:1
1004:Farman
978:petrol
975:Octane
941:sodium
885:Stroke
403:Poland
369:, and
354:) and
216:diesel
171:radial
59:Piston
2314:Venus
2274:Gemma
2259:Atlas
2249:NZ 95
2244:NZ 90
2239:NZ 85
2234:NZ 60
2229:NZ 40
2160:M 337
2155:M 332
2108:W-VII
2088:W-III
2083:Pegas
1813:Gamma
1755:Orion
1717:Viper
1627:Orion
1590:Titan
1575:Orion
1550:Hydra
1545:Draco
1153:Notes
1016:Rotol
935:Four
866:Type:
490:Note:
434:Pegas
263:when
55:Type
2370:M602
2365:M601
2342:M701
2309:Vega
2264:Bora
2139:M208
2134:M202
2129:Atom
2103:W-VI
2093:W-IV
2073:Mira
2063:Mars
1969:Lynx
1789:Odin
1784:Thor
1657:and
1417:ISBN
1399:ISBN
1384:ISBN
1370:ISBN
1352:ISBN
1333:ISBN
1243:ISBN
1193:2010
876:Bore
409:and
247:The
240:and
229:and
188:and
165:The
2360:H80
2337:M06
2332:M05
2098:W-V
1959:136
1954:135
1949:129
1944:128
1939:126
1934:125
1929:122
1924:121
1919:115
1914:110
973:87
399:PZL
309:RPM
2387::
1909:D2
1729:/
1671:/
1490:/
1184:.
1161:^
835:.
455:.
436:.
389:,
385:,
381:,
377:,
365:,
319:.
279:.
204:.
2028:e
2021:t
2014:v
1882:e
1875:t
1868:v
1801::
1777::
1733::
1693:)
1675::
1605::
1538::
1519::
1480:e
1473:t
1466:v
1407:.
1360:.
1341:.
1251:.
1195:.
1080::
1065::
1056::
1047::
1001::
950::
933::
917::
896::
887::
878::
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
