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 of the piston, one up and one down, in one revolution of the crankshaft in contrast to a four-stroke engine which re ...
, single ignition,
aircraft engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...
s that were designed for
ultralight aircraft
Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and Aircraft flight control system, conventional three-a ...
.
[Cuyuna Development Company: ''Cuyuna Engines'', Cuyuna Development Company, undated]
The basic engine was originally designed and produced by
JLO-Motorenwerke
The ILO-Motorenwerke GmbH 2-stroke motor company in Pinneberg, Germany existed from 1911 to 1990 and was one of the biggest manufacturers of two-stroke engines in Germany. The term ‘ILO’ comes from the constructed language Esperanto and mean ...
of
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
and was later acquired by the
AMW Cuyuna Engine Company
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 ...
of
Beaufort, South Carolina
Beaufort ( , different from that of Beaufort, North Carolina) is a city in Beaufort County, South Carolina, United States, and its county seat. Chartered in 1711, it is the second-oldest city in South Carolina, behind Charleston, South Carolina ...
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, gas turbine-powered aircraft, and some cars ...
used on the current models. It also incorporates piston porting, tuned exhaust system, single
carburetor
A carburetor (also spelled carburettor or carburetter)
is a device used by a gasoline internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the Ventu ...
, 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 ripcord , ''pull start'', or ''rewind start'') is a method of starting an internal combustion engine, usually on small machines, such as lawn mowers, chainsaws, grass trimmers, ultralight aircraft, small outboard mot ...
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