29:
194:
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
144:
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
106:
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.
207:
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
215:
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.
141:
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.
649:
122:, continued its tradition of building large water-cooled aeroengines. These later engines were named after birds: Eider, Courlis (en:curlew), Pétrel and
191:
Engine lubrication was by forcing pressurized oil through the crankshaft, with sump scavenging. The supercharger had its own lubrication system.
787:
792:
642:
615:
575:
528:
263:
Designed for fighter aircraft produced higher powers, 567 kW (760 hp) at 2,800 rpm and 4,000 m (13,000 ft).
487:
1 pressure pump supplies oil via crankshaft, removed from sump by 2 scavenge pumps. Operating pressure 0.49 Mpa (71 psi)
347:
768:
497:
334:
168:
The Pétrel had four overhead valves per cylinder, two exhaust and two inlet, in bronze valve guides. Each bank had its own
797:
635:
28:
129:
The Pétrel was an upright V-12 engine with two banks of six cylinders, arranged at 60° to each other, driving a common
450:
4 spring-loaded valves per cylinder, driven in pairs via T-shaped tappets by cams on overhead camshafts, one per block
137:, all light alloy parts. The crankcase came in two pieces, with seven crankshaft bearings in the upper section.
751:
304:
720:
710:
756:
715:
690:
685:
700:
469:
single or double barrelled
Lorraine carburettor at supercharger inlet, supplied by 2 A.M. fuel pumps
695:
402:
184:, at the rear of the engine. The Pétrel's output could be left or right handed; a Lorraine patent
176:, the stem of the T moving in a guide to avoid sideways force on the valve stems. There were two
675:
741:
658:
611:
571:
519:
169:
115:
62:
299:
196:
146:
661:
393:
165:
with white metal bearings; the auxiliary rod ends ran between the forks on bronze bushes.
138:
746:
460:
185:
158:
781:
384:
319:
284:
180:
per cylinder and twin magnetos. A carburettor fed the mixture into the intake of the
177:
680:
454:
181:
99:
188:, with six satellite gears, provided an 11:17 reduction of propeller shaft speed.
627:
149:, with three compression and one scraper ring and floating bronze bushes for the
736:
324:
294:
289:
150:
445:
429:
279:
130:
103:
66:
40:
329:
314:
212:
208:
199:
fighter, where it drove a pair of counter-rotating, twin-bladed propellers.
134:
86:
351:
309:
154:
162:
173:
123:
52:
515:
536 kW (720 hp) rated at 2,650 rpm and 4,000 m (13,000 ft)
463:; independent lubrication with dedicated pressure and scavenge pumps
570:(2 ed.). Wellingborough: Patrick Stephens Ltd. p. 95.
119:
631:
380:
Supercharged upright water-cooled 60° V-12 piston engine
172:
and each cam operated a pair of valves through T-shaped
346:
A Pétrel is on display in the aircraft section of the
729:
668:
120:
39:Upright water-cooled V-12, supercharged and geared
610:. London: David & Charles. pp. 47d–48d.
459:centrifugal, driven at 8.8 crankshaft speed via
153:. The twelve pistons were connected to the six
126:. The last two remained in production in 1938.
157:in pairs, each with a master and an auxiliary
643:
8:
133:. The cylinder blocks were bolted onto the
539:cruise 12±1 g/(kW.h) (0.33± 0.05 oz/(hp.h))
650:
636:
628:
118:, which in 1937 was nationalised into the
601:
599:
597:
595:
593:
591:
589:
587:
335:French Motor Torpedo Boat Prototype 40K
227:Initial power 370 kW (500 hp).
551:
18:
561:
559:
557:
555:
269:608 kW (815 hp) at 2800 rpm
251:536 kW (719 hp) at 2300 rpm
245:370 kW (500 hp) at 2300 rpm
7:
608:Jane's All the World's Aircraft 1938
367:Jane's all the World's aircraft 1938
568:World Encyclopaedia of Aero Engines
16:1930s French piston aircraft engine
434:with accessories 475 kg (1,047 lb)
14:
330:Société Aérienne Bordelaise AB-21
475:2 plugs per cylinder; 2 magnetos
359:Specifications (12Hfrs, Normale)
27:
769:Lorraine-Dietrich aero-engines
1:
788:1930s aircraft piston engines
161:. The master rods had forked
533:315 g/(kW.h) (8.0 oz/(hp.h))
814:
257:536 kW (719 hp).
239:477 kW (640 hp).
793:Lorraine aircraft engines
765:
529:Specific fuel consumption
233:370 kW (500 hp)
26:
21:
669:V- and W- piston engines
372:General characteristics
566:Gunston, Bill (1989).
348:Musée Royal de l'Armée
305:Nieuport-Delage NiD 82
110:Design and development
730:Radial piston engines
407:28.73 L (1,753 cu in)
798:V12 aircraft engines
606:Grey, C.G. (1972).
413:1,858 mm (73.15 in)
203:Operational history
96:Lorraine 12H Pétrel
341:Engines on display
98:was a French V-12
82:Major applications
775:
774:
659:Lorraine-Dietrich
520:Compression ratio
425:795 mm (31.30 in)
419:707 mm (27.83 in)
170:overhead camshaft
114:During the 1930s
92:
91:
805:
652:
645:
638:
629:
622:
621:
603:
582:
581:
563:
537:Oil consumption:
473:Ignition system:
398:145 mm (5.71 in)
389:145 mm (5.71 in)
300:Koolhoven F.K.55
280:Breguet Br.19.10
197:Koolhoven F.K.55
116:Société Lorraine
102:, geared piston
83:
63:Société Lorraine
49:
31:
19:
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553:
548:
509:
491:Cooling system:
461:epicyclic gears
441:
374:
361:
343:
276:
221:
211:version of the
205:
139:Roller bearings
112:
81:
48:National origin
47:
17:
12:
11:
5:
811:
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583:
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508:
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498:Reduction gear
494:
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254:12Hfrs Normale
252:
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186:planet gearset
178:sparking plugs
159:connecting rod
111:
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90:
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60:
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44:
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37:
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10:
9:
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4:
3:
2:
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619:
617:0-7153-5734-4
613:
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584:
579:
577:1-85260-163-9
573:
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513:Power output:
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477:
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320:P.Z.L. P.8/II
318:
316:
313:
311:
308:
306:
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301:
298:
296:
293:
291:
288:
286:
285:Fokker D.XVII
283:
281:
278:
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273:
268:
265:
262:
260:12Hfrs Chasse
259:
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59:Manufacturer
58:
57:
54:
51:
46:
45:
42:
38:
35:
34:
30:
25:
20:
711:12Rcr Radium
705:
662:aero engines
607:
567:
542:
536:
527:
518:
512:
496:
490:
484:
478:
472:
467:Fuel system:
466:
455:Supercharger
453:
444:
428:
422:
416:
410:
403:Displacement
401:
392:
383:
377:
366:
363:
362:
274:Applications
206:
193:
190:
182:supercharger
167:
151:gudgeon pins
143:
128:
113:
100:supercharged
95:
93:
691:12F Courlis
686:12E Courlis
507:Performance
485:Oil system:
325:Renard R-31
295:Hawker Hart
290:Hawker Fury
22:12H Pétrel
782:Categories
767:See also:
757:18F Sirius
716:12R Sterna
706:12H Pétrel
546:References
479:Fuel type:
446:Valvetrain
439:Components
430:Dry weight
224:12H Pétrel
131:crankshaft
104:aeroengine
73:First run
67:Argenteuil
41:aeroengine
721:18G Orion
701:12Q Eider
364:Data from
315:Potez 542
213:Potez 540
209:Potez 542
155:crankpins
135:crankcase
87:Potez 542
747:9N Algol
742:7M Mizar
352:Brussels
310:Potez 39
219:Variants
163:big ends
423:Height:
411:Length:
174:tappets
614:
574:
481:petrol
417:Width:
394:Stroke
266:12Hgrs
248:12Hdrs
236:12Hars
147:alugir
124:Sterna
53:France
502:17:11
493:water
378:Type:
242:12Hdr
76:1932
36:Type
696:AM-6
612:ISBN
572:ISBN
385:Bore
230:12Ha
94:The
752:14A
681:12D
524:6:1
784::
737:5P
676:8B
586:^
554:^
350:,
65:,
651:e
644:t
637:v
620:.
580:.
531::
522::
500::
457::
448::
432::
405::
396::
387::
354:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
