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Six engines were ordered, but it is unclear how many were completed, as the examples supplied to
Bernard and Nieuport-Delage were merely empty shells for use as mock-ups. Bench testing commenced in March 1931, two months after the intended delivery to the airframe manufacturers, progressing slowly,
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The 12 Rcr was an inverted V-12 liquid-cooled engine with supercharger and reduction gearbox. Designed to deliver 2,000–2,200 hp (1,500–1,600 kW) at 4,000 rpm, the 12 Rcr had a high specific power from a displacement of only 28.7 L (1,750 cu in) and weight of 510 kg
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leading to the first delivery of a complete engine to
Dewoitine in July 1931. The second engine was tested at the Lorraine plant up to 3,000 rpm, but this highlighted concerns over the airworthiness of the engine, which was rejected for flight use. Once
114:) issued a specification to three companies for a racing float-plane to compete in the 1932 Schneider Trophy. Power for the three aircraft was to be supplied by an engine specifically designed for the task, the Lorraine 12Rcr Radium.
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by winning the competition three times consecutively. Despite this desire, success for French aircraft was not forthcoming. To help address shortcomings, the
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had permanently secured the
Schneider Trophy, further development of the Schneider racers and their specialised engines was abandoned.
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Rateau mechanical two-stage supercharger with a hydromechanical drive running at 7:1 crankshaft speed.
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From the first
Schneider Trophy race in 1913, France had a deep desire to fulfil the requirements of
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118:(1,120 lb). Testing on the bench was also carried out with Rateau Turbo-chargers, but
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was an inverted liquid-cooled 60Âş V-12 piston engine, designed specifically for use by
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DOCAVIA 25 : les
Moteurs à pistons aeronautiques français (1900/1960) Tome II
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453:
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274:(in French) (Version 1, éd. 1998 ed.). DOCAVIA 24 / Editions Larivière.
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3 complete engines with other part-completed engines used as maock-ups
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The 12Rcr was intended to power the following racing seaplanes:
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340:. London: Sampson Low, Marston & company, ltd. p. 40d.
312:(in French) (Version 1, éd. 1998 ed.). Editions Larivière.
303:(in French). .De Agostini Institut GĂ©ographique. p. 133.
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les
Moteurs à pistons aeronautiques français (1900/1960)
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1,500–1,600 kW (2,000–2,200 hp) at 4,000 rpm
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112:service technique et industriel de l'aéronautique
30:V-12 inverted water-cooled racing piston engine
360:
8:
87:Coupe d'Aviation Maritime Jacques Schneider
367:
353:
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301:L'aviation - Grande Encyclopédie Illustrée
308:Bodemer, Alfred; Laugier, Robert (1987).
270:Bodemer, Alfred; Laugier, Robert (1987).
178:V-12 inverted liquid-cooled piston engine
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252:0.3487 kg/kW (0.5733 lb/hp)}
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7:
338:Jane's all the World's Aircraft 1931
205:28.7 L (1,750 cu in)
16:1930s French aircraft piston engine
84:racing seaplanes competing in the
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94:) air races in the early 1930s.
214:510 kg (1,120 lb) dry
486:Lorraine-Dietrich aero-engines
319:Les avions Bernard: DOCAVIA 31
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515:Inverted V12 aircraft engines
505:1930s aircraft piston engines
321:(in French). Éd. Larivière.
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510:Lorraine aircraft engines
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299:Novara, A.A. V.V (1985).
196:145 mm (5.7 in)
187:145 mm (5.7 in)
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386:V- and W- piston engines
336:Grey, C.G., ed. (1931).
170:General characteristics
154:Nieuport-Delage NiD.651
90:(commonly known as the
160:Specifications (12Rcr)
98:Design and development
447:Radial piston engines
78:Lorraine 12Rcr Radium
317:Liron, Jean (1990).
122:Operational history
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376:Lorraine-Dietrich
104:Jacques Schneider
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51:Lorraine-Dietrich
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149:Dewoitine HD.412
92:Schneider Trophy
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293:Further reading
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144:Bernard H.V.220
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36:National origin
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248:Specific power
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241:Power output:
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22:12Rcr Radium
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428:12Rcr Radium
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379:aero engines
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226:Supercharger
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201:Displacement
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135:Applications
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66:Number built
408:12F Courlis
403:12E Courlis
235:Performance
60:March 1931
499:Categories
484:See also:
474:18F Sirius
433:12R Sterna
423:12H PĂ©trel
257:References
219:Components
210:Dry weight
57:First run
438:18G Orion
418:12Q Eider
165:Data from
464:9N Algol
459:7M Mizar
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192:Stroke
82:French
41:France
176:Type:
108:STIAĂ©
27:Type
413:AM-6
323:ISBN
276:ISBN
183:Bore
76:The
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398:12D
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454:5P
393:8B
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