BMW VI: Difference between revisions
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{|{{Infobox Aircraft Begin |
{|{{Infobox Aircraft Begin |
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|name = BMW VI |
|name = BMW VI |
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|image = File:BMW VI.jpg |
|image = File:BMW VI Berlin 02.jpg |
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|caption = BMW VI at the Technik-Museum Berlin |
|caption = BMW VI at the Technik-Museum Berlin |
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}}{{Infobox Aircraft Engine |
}}{{Infobox Aircraft Engine |
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|manufacturer=[[BMW]] |
|manufacturer=[[BMW]] |
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|national origin= |
|national origin= |
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|first run= |
|first run= 1926 |
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|major applications= |
|major applications= [[Heinkel He 51]] <br/> [[Kawasaki Ki-10]] |
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|number built = |
|number built = |
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|program cost = |
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|unit cost = |
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|developed from = [[BMW IV]] |
|developed from = [[BMW IV]] |
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|variants with their own articles = |
|variants with their own articles = |
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|developed into = [[BMW VII]] |
|developed into = [[BMW VII]] <br/> [[Mikulin M-17]] |
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}} |
}} |
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|} |
|} |
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==Design and development== |
==Design and development== |
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[[File:BMW VI Front Side.jpg|thumb|left|Front view of the BMW VI]] |
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The BMW VI was the first twelve-cylinder engine built by the BMW. It essentially consisted of two [[cylinder bank]]s from the six-cylinder [[BMW IV]] bolted to a common cast aluminium crankcase at a 60-degree included angle between the cylinder banks. Series production commenced in 1926 after type approval had been granted. From 1930 on, after 1000 engines of the BMW VI type had already been delivered, [[Germany]] was again permitted to construct military aircraft. The sudden additional demand resulted in the production figures increasing rapidly. In 1933 the BMW VI was used for BMW's first experiments with direct fuel injection. |
The BMW VI was the first twelve-cylinder engine built by the BMW. It essentially consisted of two [[cylinder bank]]s from the six-cylinder [[BMW IV]] bolted to a common cast aluminium crankcase at a 60-degree included angle between the cylinder banks. Series production commenced in 1926 after type approval had been granted. From 1930 on, after 1000 engines of the BMW VI type had already been delivered, [[Germany]] was again permitted to construct military aircraft. The sudden additional demand resulted in the production figures increasing rapidly. In 1933 the BMW VI was used for BMW's first experiments with direct fuel injection. |
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'''5.5''', '''6''' or '''7.3''' denotes compression ratio. No additional letter denotes BMW carburetor and direct-drive propeller (7.3), '''u''' denotes a propeller reduction gear (7.3u), '''z''' denotes Zenith carburetor (7.3z), '''zu''' denotes Zenith carburetor and propeller reduction gear (7.3zu). |
'''5.5''', '''6''' or '''7.3''' denotes compression ratio. No additional letter denotes BMW carburetor and direct-drive propeller (7.3), '''u''' denotes a propeller reduction gear (7.3u), '''z''' denotes Zenith carburetor (7.3z), '''zu''' denotes Zenith carburetor and propeller reduction gear (7.3zu). |
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[[File:BMW VI right side front.jpg|thumb|BMW VI at the Technik-Museum Berlin]] |
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;BMW VI 5.5 |
;BMW VI 5.5 |
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: Compression ratio 5.5:1, {{convert|600-650|PS|hp|abbr=on|sigfig=3}} at up to 1600 rpm at sea level |
: Compression ratio 5.5:1, {{convert|600-650|PS|hp|abbr=on|sigfig=3}} at up to 1600 rpm at sea level |
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| Line 39: | Line 39: | ||
;BMW VI 7.3 |
;BMW VI 7.3 |
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: Compression ratio 7.3:1 {{convert|680-750|PS|hp|abbr=on|sigfig=3}} at up to 1700 rpm at sea level, [[87 Octane]] fuel |
: Compression ratio 7.3:1 {{convert|680-750|PS|hp|abbr=on|sigfig=3}} at up to 1700 rpm at sea level, [[87 Octane]] fuel |
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| ⚫ | |||
| ⚫ | |||
;Kawasaki Ha9: (long designation:- '''Army Type 98 850hp Liquid Cooled In-line''') licence production in Japan by Kawasaki |
;Kawasaki Ha9: (long designation:- '''Army Type 98 850hp Liquid Cooled In-line''') licence production in Japan by Kawasaki |
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==Applications== |
==Applications== |
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[[File:BMW VI valve covers.jpg|thumb|BMW VI head detail]] |
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{{div col|colwidth= |
{{div col|colwidth=30em}} |
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* [[Albatros L 77v]] |
* [[Albatros L 77v]] |
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* [[Arado Ar 64]] |
* [[Arado Ar 64]] |
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* [[Arado Ar 68]] |
* [[Arado Ar 68]] |
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* [[Arado SSD I]] |
* [[Arado SSD I]] |
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* [[Brutus (car)]] |
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* [[Dornier Do 10]] |
* [[Dornier Do 10]] |
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* [[Dornier Do 14]] |
* [[Dornier Do 14]] |
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* [[Heinkel He 60]] |
* [[Heinkel He 60]] |
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* [[Heinkel He 70]] |
* [[Heinkel He 70]] |
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* [[Heinkel He 111]] |
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* [[Junkers F.24ko]] |
* [[Junkers F.24ko]] |
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* [[Kawasaki Type 92]] |
* [[Kawasaki Type 92]] |
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* [[Polikarpov R-5]] prototype |
* [[Polikarpov R-5]] prototype |
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* [[Schienenzeppelin]] |
* [[Schienenzeppelin]] |
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* [[Tupolev TB-3]] |
* [[Tupolev TB-3]] |
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{{col div end}} |
{{col div end}} |
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* [[BMW]] Brutus Experimentalfahrzeug |
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==Specifications (BMW |
==Specifications (BMW VI 7.3z)== |
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[[File:BMW VI-106.jpg|thumb|Side view of the BMW VI]] |
[[File:BMW VI-106.jpg|thumb|Side view of the BMW VI]] |
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{{pistonspecs| |
{{pistonspecs| |
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|ref=Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944<ref name=schneider>{{cite book |last=Schneider |first=Helmut (Dipl.Ing.) |title=Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 |date=1944 |publisher=Herm. Beyer Verlag |location=Leipzig |isbn=381120484X |edition=Facsimile reprint 1986 |language=German |page=365}}</ref> |
|ref=''Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944'' <ref name=schneider>{{cite book |last=Schneider |first=Helmut (Dipl.Ing.) |title=Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 |date=1944 |publisher=Herm. Beyer Verlag |location=Leipzig |isbn=381120484X |edition=Facsimile reprint 1986 |language=German |page=365}}</ref> |
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|type=V-12 |
|type=V-12, 60° water-cooled piston engine |
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|bore={{convert|160|mm|in|2|abbr=on}} |
|bore={{convert|160|mm|in|2|abbr=on}} |
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|stroke={{convert|190|mm|in|2|abbr=on}} / {{convert|199|mm|in|2|abbr=on}} (different between right and left cylinder bank due to [[Connecting rod#Compound rods|articulated connecting rods]]). |
|stroke={{convert|190|mm|in|2|abbr=on}} / {{convert|199|mm|in|2|abbr=on}} (different between right and left cylinder bank due to [[Connecting rod#Compound rods|articulated connecting rods]]). |
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|displacement={{cvt|46. |
|displacement={{cvt|46.9|L|cuin|2}} |
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|length={{convert|1810|mm|in|2|abbr=on}} |
|length={{convert|1810|mm|in|2|abbr=on}} |
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|diameter= |
|diameter= |
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:*{{cvt|620|PS|hp kW|0}} at 1,590 rpm (30 minutes) at sea level |
:*{{cvt|620|PS|hp kW|0}} at 1,590 rpm (30 minutes) at sea level |
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:*{{cvt|550|PS|hp kW|0}} at 1,530 rpm (max. duration) at sea level |
:*{{cvt|550|PS|hp kW|0}} at 1,530 rpm (max. duration) at sea level |
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|specpower={{cvt|16|PS/ |
|specpower={{cvt|16|PS/L|hp/cuin kW/L|2}} |
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|compression=7.3 |
|compression=7.3 |
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|fuelcon= |
|fuelcon= |
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|specfuelcon=<br> |
|specfuelcon=<br> |
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:*{{cvt|0.23|kg/ |
:*{{cvt|0.23|kg/PSh|lb/hph kg/kWh|3}} at 1,590 rpm |
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:*{{cvt|0.225|kg/ |
:*{{cvt|0.225|kg/PSh|lb/hph kg/kWh|3}} at 1,530 rpm |
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|oilcon={{cvt|0.003|-|0.01|kg/ |
|oilcon={{cvt|0.003|-|0.01|kg/PSh|lb/hph kg/kWh|3}} at 1,530 rpm |
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|power/weight={{cvt|1.47|PS/kg|hp/lb kW/kg}} |
|power/weight={{cvt|1.47|PS/kg|hp/lb kW/kg}} |
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*'''B.M.E.P.''' |
*'''B.M.E.P.:''' {{cvt|6.9|atm|bar psi}} |
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|designer= |
|designer= |
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|reduction_gear= |
|reduction_gear=none |
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|general_other= |
|general_other= |
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==References== |
==References== |
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{{reflist}} |
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==Further reading== |
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* {{cite book |
* {{cite book |
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|last= Gunston |first= Bill |
|last= Gunston |first= Bill |
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}} |
}} |
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| ⚫ | |||
==External links== |
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| ⚫ | |||
{{BMW aeroengines}} |
{{BMW aeroengines}} |
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{{Japanese Imperial Army aeroengines}} |
{{Japanese Imperial Army aeroengines}} |
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{{Aeroengine-specs}} |
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[[Category:BMW aircraft engines]] |
[[Category:BMW aircraft engines]] |
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[[Category:1920s aircraft piston engines]] |
[[Category:1920s aircraft piston engines]] |
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[[Category:V12 aircraft engines]] |
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Latest revision as of 18:16, 13 November 2023
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (April 2018) |
| BMW VI | |
|---|---|
| |
| BMW VI at the Technik-Museum Berlin | |
| Type | V engine |
| Manufacturer | BMW |
| First run | 1926 |
| Major applications | Heinkel He 51 Kawasaki Ki-10 |
| Developed from | BMW IV |
| Developed into | BMW VII Mikulin M-17 |
The BMW VI was a water-cooled V-12 aircraft engine built in Germany in the 1920s. It was one of the most important German aero engines in the years leading up to World War II, with thousands built. It was further developed as the BMW VII and BMW IX, although these saw considerably less use. It was also produced in the Soviet Union as the M-17 and Japan as the Kawasaki Ha-9.
Design and development[edit]
The BMW VI was the first twelve-cylinder engine built by the BMW. It essentially consisted of two cylinder banks from the six-cylinder BMW IV bolted to a common cast aluminium crankcase at a 60-degree included angle between the cylinder banks. Series production commenced in 1926 after type approval had been granted. From 1930 on, after 1000 engines of the BMW VI type had already been delivered, Germany was again permitted to construct military aircraft. The sudden additional demand resulted in the production figures increasing rapidly. In 1933 the BMW VI was used for BMW's first experiments with direct fuel injection.
The BMW VI was the chosen source of power for numerous record-breaking and long-distance flights, including an east-to-west crossing of the Atlantic in 1930 and a round-the world flight in 1932, both by Wolfgang von Gronau in an open Dornier Wal flying boat powered by two BMW VI engines.
The BMW VI was put to unusual use as a power unit for the "Rail Zeppelin" high-speed railcar. Many versions of the BMW VI engine were developed, and it was built under license in Japan and the Soviet Union. This was further evidence of the reliability of an engine with which BMW made a fundamental contribution to the build-up of German air transport. At least 9,200 were built between 1926 and 1938. The engine was license-built in the Soviet Union under the supervision of Mikulin, who then further developed it as the M-17. More license built engines were produced by Kawasaki Heavy Industries in Japan as the Kawasaki Ha9 (long designation:- Army Type 98 850hp Liquid Cooled In-line).
Variants[edit]
5.5, 6 or 7.3 denotes compression ratio. No additional letter denotes BMW carburetor and direct-drive propeller (7.3), u denotes a propeller reduction gear (7.3u), z denotes Zenith carburetor (7.3z), zu denotes Zenith carburetor and propeller reduction gear (7.3zu).
- BMW VI 5.5
- Compression ratio 5.5:1, 600–650 PS (592–641 hp) at up to 1600 rpm at sea level
- BMW VI 6.0
- Compression ratio 6:1, 630–660 PS (621–651 hp) at up to 1650 rpm at sea level, 80 Octane fuel
- BMW VI 7.3
- Compression ratio 7.3:1 680–750 PS (671–740 hp) at up to 1700 rpm at sea level, 87 Octane fuel
- Mikulin M-17
- Licence production in the USSR
- Kawasaki Ha9
- (long designation:- Army Type 98 850hp Liquid Cooled In-line) licence production in Japan by Kawasaki
Applications[edit]
- Albatros L 77v
- Arado Ar 64
- Arado Ar 65
- Arado Ar 68
- Arado SSD I
- Brutus (car)
- Dornier Do 10
- Dornier Do 14
- Dornier Do 17
- Focke-Wulf Fw 42
- Heinkel He 45
- Heinkel He 51
- Heinkel He 59
- Heinkel He 60
- Heinkel He 70
- Heinkel He 111
- Junkers F.24ko
- Kawasaki Type 92
- Kawasaki Ki-10
- Messerschmitt M.20
- Polikarpov R-5 prototype
- Schienenzeppelin
- Tupolev TB-3
Specifications (BMW VI 7.3z)[edit]
Data from Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 [1]
General characteristics
- Type: V-12, 60° water-cooled piston engine
- Bore: 160 mm (6.30 in)
- Stroke: 190 mm (7.48 in) / 199 mm (7.83 in) (different between right and left cylinder bank due to articulated connecting rods).
- Displacement: 46.9 L (2,862.01 cu in)
- Length: 1,810 mm (71.26 in)
- Width: 859 mm (33.82 in)
- Height: 1,103 mm (43.43 in)
- Dry weight: 510 kg (1,124 lb)
Components
- Valvetrain: 1 inlet + 1 exhaust valve per cylinder operated by a shaft driven overhead camshaft via rockers
- Fuel system: 2 x Zenith 60 DCL
- Fuel type: min. 87 octane gasoline
- Cooling system: Liquid-cooled
- Reduction gear: none
Performance
- Power output:
- 750 PS (740 hp; 552 kW) for takeoff at 1,700 rpm (1 minute) at sea level
- 690 PS (681 hp; 507 kW) at 1,650 rpm (5 minutes) at sea level
- 620 PS (612 hp; 456 kW) at 1,590 rpm (30 minutes) at sea level
- 550 PS (542 hp; 405 kW) at 1,530 rpm (max. duration) at sea level
- Specific power: 16 PS/L (0.26 hp/cu in; 11.77 kW/L)
- Compression ratio: 7.3
- Specific fuel consumption:
- 0.23 kg/PSh (0.514 lb/(hp⋅h); 0.313 kg/kWh) at 1,590 rpm
- 0.225 kg/PSh (0.503 lb/(hp⋅h); 0.306 kg/kWh) at 1,530 rpm
- Oil consumption: 0.003–0.01 kg/PSh (0.007–0.022 lb/(hp⋅h); 0.004–0.014 kg/kWh) at 1,530 rpm
- Power-to-weight ratio: 1.47 PS/kg (0.66 hp/lb; 1.08 kW/kg)
- B.M.E.P.: 6.9 atm (7.0 bar; 101 psi)
See also[edit]
Related development
Comparable engines
Related lists
References[edit]
- ^ Schneider, Helmut (Dipl.Ing.) (1944). Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 (in German) (Facsimile reprint 1986 ed.). Leipzig: Herm. Beyer Verlag. p. 365. ISBN 381120484X.
Further reading[edit]
- Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 25.
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