Find a Part Now

BMW VII

The BMW VII was a water-cooled twelve-cylinder engine derived from the successful BMW VI. The engine was not as popular as the VI, due in no small part to the Great Depression, and only a small number were built. Experiments with supercharging led to the related BMW IX.

Design and development

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 magnetos from the back of the cylinder banks to the front, which allowed easier access for maintenance, (similar changes to the original six-cylinder BMW V led to the BMW VIII). The crankcase was offered in aluminum alloy or Elektron.

Operational history

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 Junkers Ju 52, for example, and in the Dornier Wal which Wolfgang von Gronau 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 carburettor); this led in due course to the development of the BMW IX aircraft engine.

Variants

Low compression
A low compression variant ran at 5.5:1 compression ratio, delivering 450 kW (600 hp) at 1,565 rpm
Medium compression
A medium compression variant ran at 6:1 compression ratio, delivering 560 kW (750 hp) at 1,650 rpm
BMW VIIaU
A high compression variant running at 7.3:1 compression ratio, delivering 560 kW (750 hp) for take-off.

Specifications (variant)

Data from

General characteristics

  • Type: V-12 water-cooled piston engine
  • Bore: 160 mm (6.30 in)
  • Stroke: 190 mm (7.48 in) (nominal:-master/slave connecting rods resulted in different stroke for each cylinder bank)
  • Displacement: 46.93 L (2,864 cu in)
  • Length: 2,025 mm (79.72 in)
  • Width: 864 mm (34.02 in)
  • Height: 1,045 mm (41.14 in)
  • Dry weight: 525 kg (1,157 lb)

Components

  • Fuel type: Aviation gasoline
  • Oil system: pressure fed
  • Cooling system: water-cooled
  • Reduction gear: 0.62:1

Performance

  • Power output: 450 or 560 kW (600 or 750 hp)
  • Compression ratio: 5.5 / 6 / 7.3

References

WHAT ETS OFFERS?

We are a leading provider of Engines and Transmissions. We have provided customers with an unbeatable Price,
Unmatched Quality and excellent Customer Service for 20 years.

FACTORY WARRANTIES

We use only top quality re-manufacturers to supply our clients with professionally re-manufactured Transmissions. All of our transmissions have factory backed warranties.

CERTIFIED AND TESTED

All of our engines and transmissions are rigorously tested and inspected prior to shipping. This allows us to warranty your engine to keep your vehicle on the road for years to come.

ACCESS TO RESELLERS

We provide access to Salvage yards and auto part retailers for automotive engine and transmissions .

Looking For a Specialist
Please Contact Now
1800-385-3915

Looking For a Specialist
Please Contact Now
1800-385-3915

Call us! Get a Price
003
018
114
116
117
132
303
320
321
326
327
328
335
340
501
503
507
600
700
801
802
803
C1
E23
E30
E9
F20
F25
F30
F48
GS
GT
HP4
IV
K1
K75
M
M1
M10
M2
M3
M30
M4
M5
M8
M88
R12
R18
R2
R27
R32
R45
R65
R68
R75
V
VI
VII
X
X1
X2
X3
X4
X5
X6
X7
Z
Z1
Z3
Z8
i
i3
i4
i7
i8
iX
iX1
iX3

PAY SECURELY WITH

Authorize.Net Merchant Visa Logo MasterCard Logo American Express Logo Discover Card Logo
1800-385-3915