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The main change from the VI to the VII was the addition of a 0.62 ratio propeller reduction gearing system, allowing the engine to run at higher RPM, and thus higher power settings, while still efficiently driving the same propellers. A more minor change was the movement of the
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The engine was first built in 1928 and passed its acceptance tests in June 1930. Only a few examples of the BMW VII went into operation, in the single-engined version of the
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190 / 199 mm (7.48 / 7.83 in) (nominal:-master/slave connecting rods resulted in different stroke for each cylinder bank)
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flew around the world in 1932. The VII was also used for forced-aspiration experiments with a "mixture blower" (a radial fan located behind the
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A high compression variant running at 7.3:1 compression ratio, delivering 560 kW (750 hp) for take-off.
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A medium compression variant ran at 6:1 compression ratio, delivering 560 kW (750 hp) at 1,650 rpm
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A low compression variant ran at 5.5:1 compression ratio, delivering 450 kW (600 hp) at 1,565 rpm
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to the front, which allowed easier access for maintenance, (similar changes to the original six-cylinder
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BMW aero engines: Milestones in aviation from the beginnings to the present
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Jakobs, Fred; Kroeschel, Robert R.; Pierer, Christian (June 2009).
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led to the BMW VIII) . The crankcase was offered in
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44:adding citations to reliable sources
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439:. Königswinter: Heel Verlag Gmbh.
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129:V-12 water-cooled piston engine
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305:V-12 water-cooled piston engine
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726:1920s aircraft piston engines
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350:1,045 mm (41.14 in)
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287:Specifications (variant)
297:General characteristics
150:Bayerische Motorenwerke
209:Design and development
218:from the back of the
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721:BMW aircraft engines
40:improve this article
252:Wolfgang von Gronau
238:Operational history
273:Medium compression
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51:Find sources:
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29:This article
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38:Please help
33:verification
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682:BMW 109-718
651:Turboshafts
398:Performance
376:Oil system:
256:carburettor
248:Dornier Wal
715:Categories
700:BMW GT 101
633:Turboprops
422:References
370:Fuel type:
364:Components
355:Dry weight
156:First run
96:April 2018
66:newspapers
615:Turbofans
592:Turbojets
582:Bramo 323
292:Data from
279:BMW VIIaU
176:Variants
121:BMW VIIa
55:"BMW VII"
507:BMW IIIa
262:Variants
232:Elektron
216:magnetos
674:Rockets
641:BMW 028
605:BMW 018
600:BMW 003
577:BMW 803
572:BMW 802
567:BMW 801
562:BMW 139
557:BMW 132
552:BMW 117
547:BMW 116
542:BMW 114
532:BMW VII
527:BMW VII
348:Height:
336:Length:
187:BMW VII
179:BMW IX
140:Germany
80:scholar
522:BMW VI
512:BMW IV
443:
393:0.62:1
342:Width:
319:Stroke
250:which
195:BMW VI
189:was a
170:BMW VI
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623:BR700
537:BMW X
517:BMW V
303:Type:
224:BMW V
159:1928
126:Type
87:JSTOR
73:books
664:6022
659:6012
441:ISBN
310:Bore
185:The
59:news
488:BMW
230:or
42:by
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