Pratt & Whitney R-1690 Hornet
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The Pratt & Whitney R-1690 Hornet was a widely used American aircraft engine. Developed by Pratt & Whitney, 2,944 were produced from 1926 through 1942.[1] It first flew in 1927. It was a single-row, 9-cylinder air-cooled radial design. Displacement was 1,690 cubic inches (27.7 L). It was built under license in Italy as the Fiat A.59. In Germany, the BMW 132 was a developed version of this engine. The R-1860 Hornet B was an enlarged version produced from 1929.
Variants
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- R-1690-3
- Template:Cvt
- R-1690-5
- Template:Cvt
- R-1690-11
- Template:Cvt
- R-1690-13
- Template:Cvt
- R-1690-S5D1G
- Template:Cvt
- R-1690-52
- Template:Cvt
- R-1690-SDG
- R-1690-S1EG
- Template:Cvt
- R-1690-S2EG
- R-1690-25
- Template:Cvt
- R-1690-S1C3G
- Template:Cvt
- Fiat A.59 R.
- License built in Italy with reduction gearing.
- Fiat A.59 R.C.
- License built in Italy with reduction gearing and supercharger.
- BMW Hornet
- License production of the Hornet in Germany, independently developed as the BMW 132.
Applications
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Engines on display
- There is a R-1690 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.[2]
Specifications (R-1690 S1E-G)
Data from [3]
General characteristics
- Type: Nine-cylinder single-row supercharged air-cooled radial engine
- Bore: Template:Cvt
- Stroke: Template:Cvt
- Displacement: Template:Cvt
- Length: Template:Cvt
- Diameter: Template:Cvt
- Dry weight: Template:Cvt
Components
- Valvetrain: Pushrod-actuated
- Supercharger: Single-speed centrifugal type supercharger, 12.0:1 gear ratio
- Fuel system: Two-barrel Stromberg carburetor
- Fuel type: 87 octane rating gasoline
- Cooling system: Air-cooled
- Reduction gear: Epicyclic gearing, 2:3
Performance
- Power output:
- Template:Cvt at 2,300 rpm for takeoff
- Template:Cvt at 2,250 rpm at Template:Cvt
- Specific power: Template:Cvt
- Compression ratio: 6.0:1
- Specific fuel consumption: 0.6 lb/(hp•h) (362 g/(kW•h))
- Oil consumption: 0.42 oz/(hp•h) (16 g/(kW•h))
- Power-to-weight ratio: Template:Cvt
See also
Related development
Comparable engines
Related lists
References
Notes
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- ↑ Pratt & Whitney - R-1690 page Template:Webarchive Retrieved: 25 October 2008
- ↑ http://neam.org/index.php?option=com_content&view=article&layout=edit&id=1129 "Pratt & Whitney R-1690 Hornet"
- ↑ Script error: No such module "citation/CS1".
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Bibliography
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External links
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