Aeronca E-113
1936 flat-twin aircraft engine
title: "Aeronca E-113" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["boxer-engines", "1930s-aircraft-piston-engines"] description: "1936 flat-twin aircraft engine" topic_path: "sports" source: "https://en.wikipedia.org/wiki/Aeronca_E-113" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary 1936 flat-twin aircraft engine ::
::data[format=table title="infobox aero engine"]
| Field | Value |
|---|---|
| name | E-113/J-99 |
| image | JAPJ99.JPG |
| caption | An Aeronca-JAP J-99 (licensed E-113) on display at the Shuttleworth Collection. |
| engine_type | Flat-twin aircraft engine |
| manufacturer | Aeronca |
| JA Prestwich | |
| first_run | 1936 |
| number_built | 1,800 |
| developed_from | Aeronca E-107 |
| :: |
|name= E-113/J-99 |image = JAPJ99.JPG |caption = An Aeronca-JAP J-99 (licensed E-113) on display at the Shuttleworth Collection. |engine_type= Flat-twin aircraft engine |national_origin = |manufacturer= Aeronca JA Prestwich |first_run=1936 |major_applications= |number_built = 1,800 |developed_from =Aeronca E-107 |developed_into = |variants_with_their_own_articles =
The E-113 was a small flat-twin piston engine developed by Aeronca for use in some of their light aircraft. It was an overhead valve development of the flathead configuration 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.
Following an incident in October 2015, where the propeller detached from a J-99 variant Aeronca C3, the Light Aircraft Association has issued an advisory that all aircraft fitted with these engines have the crankshaft attachment inspected prior to flying again. This issue was first recognised in 1939.
Variants
;E-113A:Standard production model delivering 36-45 hp (26.85 - 33.56 kW) ;E-113C:Uprated engine delivering 40-45 hp (29.83 - 33.56 kW) ;Aeronca-JAP J-99: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, differing from the E-113 by being fitted with dual ignition. ;O-113:Engines fitted to impressed aircraft were given the designation O-113.
Applications
E-113
J-99
- Aeronca 100
- Aeronca 300
- Britten-Norman BN-1
- Currie Wot
- Dart Kitten
- Hants and Sussex Aviation Herald
- Heath Parasol
- Hillson Praga
- Luton Minor
- Peterborough Ely
- Slingsby Motor Tutor
- Taylor J.T.1
- Tipsy Junior
Engines on display
- An Aeronca E-113 is on public display at the Aerospace Museum of California
Specifications (E-113)
| and start a new, fully-formatted line with -- |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) |length= |diameter= |width= |height= |weight=118 lb (54 kg) |valvetrain= |supercharger= |turbocharger= |fuelsystem= |fueltype= |oilsystem= |coolingsystem=Air-cooled |power=36-40 hp (26.9-29.8 kW) at 2,400-2520 rpm |specpower= |compression=5.1:1 |fuelcon= |specfuelcon= |oilcon= |power/weight=
References
Notes
Bibliography
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. .
- Trainor, Todd. Aeronca K and Aeronca Engines website
- 1938 Aeronca engine manual (online copy available here)
References
- (11 February 2016). "Plane landed in Cornwall after propeller fell off". BBC.
- (11 February 2016). "AAIB investigation to Aeronca C3, G-AEFT". [[Air Accidents Investigation Branch]].
- Lumsden 2003, p.160.
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::