40:
205:
First run in 1932, the early Pétrels produced only 370 kW (500 hp) but by 1938 the engine had been developed into the 12Hars model which gave 640 kW (860 hp). This variant was used by the
155:
Steel cylinder liners were screwed into the heads, with their lower parts projecting into the crankcase. Steel seats for valves and sparking plugs were shrunk into the heads. The pistons were forged from
117:
initially rated at 370 kW (500 hp), but later developed to give 640 kW (860 hp). It powered a variety of mostly French aircraft in the mid-1930s, several on an experimental basis.
218:
Like the
Koolhoven F.K.55, many of the aircraft types to use the Pétrel were one-offs, testing the Lorraine against better known engines from Hispano-Suiza and Rolls-Royce but the
226:
family were built in numbers, with 74 of these twin-engined, multi-role (bomber, reconnaissance and transport) aircraft supplied to the French and
Spanish air forces.
152:
were used at the crankshaft ends; the remaining five were plain. The upper crankcase section also had integrally cast water channels as part of the cooling system.
660:
133:, continued its tradition of building large water-cooled aeroengines. These later engines were named after birds: Eider, Courlis (en:curlew), Pétrel and
202:
Engine lubrication was by forcing pressurized oil through the crankshaft, with sump scavenging. The supercharger had its own lubrication system.
798:
803:
653:
626:
586:
539:
274:
Designed for fighter aircraft produced higher powers, 567 kW (760 hp) at 2,800 rpm and 4,000 m (13,000 ft).
498:
1 pressure pump supplies oil via crankshaft, removed from sump by 2 scavenge pumps. Operating pressure 0.49 Mpa (71 psi)
358:
779:
508:
345:
179:
The Pétrel had four overhead valves per cylinder, two exhaust and two inlet, in bronze valve guides. Each bank had its own
808:
646:
39:
140:
The Pétrel was an upright V-12 engine with two banks of six cylinders, arranged at 60° to each other, driving a common
461:
4 spring-loaded valves per cylinder, driven in pairs via T-shaped tappets by cams on overhead camshafts, one per block
148:, all light alloy parts. The crankcase came in two pieces, with seven crankshaft bearings in the upper section.
762:
315:
731:
721:
767:
726:
701:
696:
711:
480:
single or double barrelled
Lorraine carburettor at supercharger inlet, supplied by 2 A.M. fuel pumps
706:
413:
195:, at the rear of the engine. The Pétrel's output could be left or right handed; a Lorraine patent
187:, the stem of the T moving in a guide to avoid sideways force on the valve stems. There were two
686:
752:
669:
622:
582:
530:
180:
126:
73:
310:
207:
157:
672:
404:
176:
with white metal bearings; the auxiliary rod ends ran between the forks on bronze bushes.
149:
757:
471:
196:
169:
792:
395:
330:
295:
191:
per cylinder and twin magnetos. A carburettor fed the mixture into the intake of the
188:
17:
691:
465:
192:
110:
199:, with six satellite gears, provided an 11:17 reduction of propeller shaft speed.
638:
160:, with three compression and one scraper ring and floating bronze bushes for the
747:
335:
305:
300:
161:
456:
440:
290:
141:
114:
77:
51:
340:
325:
223:
219:
210:
fighter, where it drove a pair of counter-rotating, twin-bladed propellers.
145:
97:
362:
320:
165:
173:
184:
134:
63:
526:
536 kW (720 hp) rated at 2,650 rpm and 4,000 m (13,000 ft)
474:; independent lubrication with dedicated pressure and scavenge pumps
581:(2 ed.). Wellingborough: Patrick Stephens Ltd. p. 95.
130:
642:
391:
Supercharged upright water-cooled 60° V-12 piston engine
183:
and each cam operated a pair of valves through T-shaped
357:
A Pétrel is on display in the aircraft section of the
740:
679:
131:
50:Upright water-cooled V-12, supercharged and geared
621:. London: David & Charles. pp. 47d–48d.
470:centrifugal, driven at 8.8 crankshaft speed via
164:. The twelve pistons were connected to the six
137:. The last two remained in production in 1938.
168:in pairs, each with a master and an auxiliary
654:
8:
144:. The cylinder blocks were bolted onto the
550:cruise 12±1 g/(kW.h) (0.33± 0.05 oz/(hp.h))
661:
647:
639:
129:, which in 1937 was nationalised into the
612:
610:
608:
606:
604:
602:
600:
598:
346:French Motor Torpedo Boat Prototype 40K
238:Initial power 370 kW (500 hp).
562:
29:
572:
570:
568:
566:
280:608 kW (815 hp) at 2800 rpm
262:536 kW (719 hp) at 2300 rpm
256:370 kW (500 hp) at 2300 rpm
7:
619:Jane's All the World's Aircraft 1938
378:Jane's all the World's aircraft 1938
579:World Encyclopaedia of Aero Engines
27:1930s French piston aircraft engine
445:with accessories 475 kg (1,047 lb)
25:
341:Société Aérienne Bordelaise AB-21
486:2 plugs per cylinder; 2 magnetos
370:Specifications (12Hfrs, Normale)
38:
780:Lorraine-Dietrich aero-engines
1:
799:1930s aircraft piston engines
172:. The master rods had forked
544:315 g/(kW.h) (8.0 oz/(hp.h))
825:
268:536 kW (719 hp).
250:477 kW (640 hp).
804:Lorraine aircraft engines
776:
540:Specific fuel consumption
244:370 kW (500 hp)
37:
32:
680:V- and W- piston engines
383:General characteristics
577:Gunston, Bill (1989).
359:Musée Royal de l'Armée
316:Nieuport-Delage NiD 82
121:Design and development
741:Radial piston engines
418:28.73 L (1,753 cu in)
809:V12 aircraft engines
18:Lorraine 12Ha Pétrel
617:Grey, C.G. (1972).
424:1,858 mm (73.15 in)
214:Operational history
107:Lorraine 12H Pétrel
352:Engines on display
109:was a French V-12
93:Major applications
786:
785:
670:Lorraine-Dietrich
531:Compression ratio
436:795 mm (31.30 in)
430:707 mm (27.83 in)
181:overhead camshaft
125:During the 1930s
103:
102:
16:(Redirected from
816:
663:
656:
649:
640:
633:
632:
614:
593:
592:
574:
548:Oil consumption:
484:Ignition system:
409:145 mm (5.71 in)
400:145 mm (5.71 in)
311:Koolhoven F.K.55
291:Breguet Br.19.10
208:Koolhoven F.K.55
127:Société Lorraine
113:, geared piston
94:
74:Société Lorraine
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502:Cooling system:
472:epicyclic gears
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222:version of the
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150:Roller bearings
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59:National origin
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509:Reduction gear
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265:12Hfrs Normale
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197:planet gearset
189:sparking plugs
170:connecting rod
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628:0-7153-5734-4
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588:1-85260-163-9
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524:Power output:
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331:P.Z.L. P.8/II
329:
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299:
297:
296:Fokker D.XVII
294:
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273:
271:12Hfrs Chasse
270:
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70:Manufacturer
69:
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62:
57:
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53:
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36:
31:
19:
722:12Rcr Radium
716:
673:aero engines
618:
578:
553:
547:
538:
529:
523:
507:
501:
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489:
483:
478:Fuel system:
477:
466:Supercharger
464:
455:
439:
433:
427:
421:
414:Displacement
412:
403:
394:
388:
377:
374:
373:
285:Applications
217:
204:
201:
193:supercharger
178:
162:gudgeon pins
154:
139:
124:
111:supercharged
106:
104:
702:12F Courlis
697:12E Courlis
518:Performance
496:Oil system:
336:Renard R-31
306:Hawker Hart
301:Hawker Fury
33:12H Pétrel
793:Categories
778:See also:
768:18F Sirius
727:12R Sterna
717:12H Pétrel
557:References
490:Fuel type:
457:Valvetrain
450:Components
441:Dry weight
235:12H Pétrel
142:crankshaft
115:aeroengine
84:First run
78:Argenteuil
52:aeroengine
732:18G Orion
712:12Q Eider
375:Data from
326:Potez 542
224:Potez 540
220:Potez 542
166:crankpins
146:crankcase
98:Potez 542
758:9N Algol
753:7M Mizar
363:Brussels
321:Potez 39
230:Variants
174:big ends
434:Height:
422:Length:
185:tappets
625:
585:
492:petrol
428:Width:
405:Stroke
277:12Hgrs
259:12Hdrs
247:12Hars
158:alugir
135:Sterna
64:France
513:17:11
504:water
389:Type:
253:12Hdr
87:1932
47:Type
707:AM-6
623:ISBN
583:ISBN
396:Bore
241:12Ha
105:The
763:14A
692:12D
535:6:1
795::
748:5P
687:8B
597:^
565:^
361:,
76:,
662:e
655:t
648:v
631:.
591:.
542::
533::
511::
468::
459::
443::
416::
407::
398::
365:.
20:)
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