Aeronca E-107

E-107
	E107 on display
Type	Flat-twin aircraft engine
National origin	United States of America
Manufacturer	Aeronautical Corporation of America
Designed by	Ray Poole and Robert Galloway
First run	1929
Major applications	Aeronca C-2
Number built	115
Unit cost	600 US Dollar (1931)
Variants	Aeronca E-113

The Aeronca E-107 was one of the first low-cost reliable engines of the post-World War I era.[1]

Design and development

An Aeronca C-2, with the E-107 "flathead" engine

The E-107A was a production aviation flathead engine designed to replace a Morehouse engine on the first prototype of the Aeronca C-2. The first five were produced without cooling fins on the crankcase, but with all versions having air-cooling fins atop the cylinder heads, similar to many air-cooled two-stroke engines in appearance. A Winfleld Model 5 carburetor was standard for the engine.[2] The E-107 was replaced by the uprated, overhead valvetrain E-113 engine based on the same design.[3]

Variants

E-107: Standard production engine
E-107A: The E-107A was produced for Aeronca by the Govro-Nelson Company of Detroit, Michigan.[2]
O-107: Designation given to engines fitted to impressed aircraft

Applications

Aeronca C-2
Pickering-Pearson KP.2

Engines on display

An E-107 is on display at the EAA Airventure Museum in Oshkosh, Wisconsin
The restored first prototype Aeronca C-2 (registration NC 626N) fitted with an E-107 is on display at the Udvar-Hazy building of the Smithsonian's National Air and Space Museum.[4]

Specifications (E-107)

Data from [5]

General characteristics

Type: 2-cyl. air-cooled horizontally opposed flathead engine
Bore: 4.5 in (110 mm)
Stroke: 4 in (100 mm)
Displacement: 107 cubic inches
Dry weight: 114 lb (52 kg)

Components

Valvetrain: One inlet and one exhaust valve per cylinder, operated by tappets directly from the camshaft
Oil system: scavenged pressure feed.
Cooling system: air-cooled

Performance

Power output: 30 hp (22 kW) maximum at 2,500 rpm, (cruiing rpm 2000rpm.
Compression ratio: 4:1
Specific fuel consumption: 0.55 lb/hp (0.33 kg/kW)/hr at 2,000 rpm
Oil consumption: 0.21 lb/hp (0.13 kg/kW)/hr

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References

Janet Rose Daly Bednarek, Michael H. Bednarek. Dreams of flight: general aviation in the United States.
"Aeronca E107A-39". Archived from the original on 4 July 2011. Retrieved 20 January 2012.
Kenneth M. Molson, National Aviation Museum (Canada). Canada's National Aviation Museum: its history and collections. p. 100.
"Aeronca C-2". Retrieved 20 January 2012.
Grey, C.G., ed. (1931). Jane's all the World's Aircraft 1931. London: Sampson Low, Marston & company, ltd. pp. 64d–65d.

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[1] Janet Rose Daly Bednarek, Michael H. Bednarek. Dreams of flight: general aviation in the United States.

[Aeronca-2] "Aeronca E107A-39". Archived from the original on 4 July 2011. Retrieved 20 January 2012.

[3] Kenneth M. Molson, National Aviation Museum (Canada). Canada's National Aviation Museum: its history and collections. p. 100.

[4] "Aeronca C-2". Retrieved 20 January 2012.

[JAWA1931-5] Grey, C.G., ed. (1931). Jane's all the World's Aircraft 1931. London: Sampson Low, Marston & company, ltd. pp. 64d–65d.