The 2si 215 is a family of single-cylinder, fan-cooled,
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of ...
, single ignition,
aircraft engines that were designed for
ultralight aircraft.
[Cuyuna Development Company: ''Cuyuna Engines'', Cuyuna Development Company, undated]
The basic engine was originally designed and produced by
JLO-Motorenwerke of
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
and was later acquired by the
AMW Cuyuna Engine Company of
Beaufort, South Carolina
Beaufort ( , a different pronunciation from that used by the city with the same name in North Carolina) is a city in and the county seat of Beaufort County, South Carolina, United States. Chartered in 1711, it is the second-oldest city in South ...
and marketed under the ''Cuyuna'' brand name. Later the engine was marketed by Cuyuna under the
Two Stroke International
2si was an American engine manufacturer located in Beaufort, South Carolina. The company was a wholly owned subsidiary of the AMW Cuyuna Engine Company, formerly known as the ''Cuyuna Development Company''.Cliche, Andre: ''Ultralight Aircraft S ...
(2si) brand. Cuyuna no longer markets engines for aircraft use although the 215 is still in production as an industrial and multi-fuel engine.
[Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-2 Cybair Limited Publishing, 2001. ]
Development
The 215 is a conventional single-cylinder engine that weighs in its 215R aircraft version. The engine features single breaker and points ignition, with single
capacitor discharge ignition
Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles, lawn mowers, chainsaws, small engines, turbine-powered aircraft, and some cars. It ...
used on the current models. It also incorporates piston porting, tuned exhaust system, single
carburetor, fan cooling, fuel pump, a cast iron cylinder liner, ball, needle and roller bearings throughout. The 215R aircraft version was offered with an optional belt reduction system and the modern industrial versions have an optional gearbox with ratios of 2.04, 2.65 and 3.06. Starting is a
recoil starter
Rope start (also called pull start or ''rewind start'') is a method of starting an internal combustion engine, usually on small machines, such as lawn mowers, chainsaws, ultralight aircraft, small outboard motors and portable engine-generators. ...
with a custom electric starter available as an option.
Variants
;215D
:Gasoline aircraft engine with direct drive. Single carburetor, at 6000 rpm, weight , out of production.
;215F
:Gasoline industrial engine. Single carburetor, at 6000 rpm, still in production.
;215MF
:Multi-fuel industrial engine. Single carburetor, at 6500 rpm, weight , still in production.
;215R
:Gasoline aircraft engine with belt reduction drive. single carburetor, at 6000 rpm, weight , out of production.
Applications
Specifications (215D aircraft engine)
See also
References
{{2si
Air-cooled aircraft piston engines
Two-stroke aircraft piston engines