Aeronca E-113

E-113/J-99
An Aeronca-JAP J-99 (licensed E-113) on display at the Shuttleworth Collection.
Type	Flat-twin aircraft engine
Manufacturer	Aeronca JA Prestwich
First run	1936
Number built	1,800
Developed from	Aeronca E-107

The E-113 was a small flat-twin piston engine developed by Aeronca for use in some of their light aircraft. It was a development of the E-107.

Design and development

Originally fitted with a single ignition system, this was uprated to dual ignition when changes in FAA regulations made this mandatory in 1939. By that time, however, both the engine and the aircraft that it powered were facing obsolescence. Altogether, some 1,800 examples were built.

The E-113-C was license built in England as the Aeronca-JAP J-99 by J A Prestwich Limited (JAP) and powered several British aircraft types. It differed from the E-113 in that it was fitted with dual ignition.

Applications

E-113

• Aeronca C-3
• Aeronca K
• Welch OW-6M

J-99

• Aeronca 100
• Aeronca 300
• Britten-Norman BN-1
• Currie Wot
• Dart Kitten
• Hants & Sussex Herald
• Heath Parasol
• Hillson Praga
• Luton Minor
• Peterborough Ely
• Slingsby Motor Tutor
• Taylor J.T.1
• Tipsy Junior

Specifications (E-113)

General characteristics

• Type: 2-cylinder air-cooled horizontally opposed aircraft piston engine
• Bore: 4.25 in (107.95 mm)
• Stroke: 4 in (101.6 mm)
• Displacement: 113.49 in³ (1.86 L)
• Dry weight: 118 lb (54 kg)

Components

• Cooling system: Air-cooled

Performance

• Power output: 36-40 hp (26.9-29.8 kW) at 2,400-2520 rpm
• Compression ratio: 5.1:1

See also

Comparable engines

• ABC Scorpion
• Armstrong Siddeley Ounce
• Walter Atom
• Welch O-2
  

Related lists

• List of aircraft engines
  

References

Bibliography

• Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
• Trainor, Todd. Aeronca K and Aeronca Engines website
• 1938 Aeronca engine manual (online copy available here)