The 2si 460 is a family of in-line twin-cylinder,
two-stroke, single ignition,
aircraft engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years many ...
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 conventional three-axis control aircraft with ailer ...
.
[Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-2 Cybair Limited Publishing, 2001. ]
The basic engine was originally designed and produced by
ILO-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 artificial language Esperanto and means ...
of
Germany 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 and marketed under the ''Cuyuna'' brand name. Later the engine was marketed by Cuyuna under the
Two Stroke International (2si) brand. Cuyuna no longer markets engines for aircraft use, although the 460 is still in production as a Diesel/multifuel or gasoline industrial, marine and sport vehicle engine.
Development
The 460 is a conventional twin-cylinder engine that weighs in its F35 aircraft version. The engine features single
capacitor discharge ignition, piston porting, tuned exhaust system, one or two slide venturi-type
carburetor
A carburetor (also spelled carburettor) is a device used by an 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 venturi tube in the main meteri ...
s, fuel pump, a cast iron cylinder liner, ball, needle and roller bearings throughout. The aircraft version was offered with cog belt drive or a gearbox reduction system. Starting is electric starter or
recoil starter.
Variants
;460-F35
:Gasoline aircraft engine, single carburetor, at 6000 rpm, weight (discontinued).
;460-F40
:Gasoline aircraft engine, single carburetor, at 6500 rpm, weight (discontinued).
[Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 69. BAI Communications. ]
;460-F45
:Gasoline aircraft engine, dual carburetors, at 6750 rpm, weight (discontinued).
;460 MF
:Diesel/multi-fuel engine for marine and industrial applications, at 6000 rpm, weight without gearbox.
;460F-35
:Gasoline industrial engine and sport vehicle engine for
auto racing,
kart and
All-terrain vehicle applications, single carburetor, at 6000 rpm, basic weight .
;460FE-35
:Gasoline industrial engine and sport vehicle engine for auto racing, kart and ATV applications with electric start, single carburetor, at 6000 rpm, basic weight .
;460L-50
:Gasoline marine engine powering a
jet pump, at 6750 rpm.
Applications
Specifications (460-F35 aircraft engine)
See also
References
{{2si
Air-cooled aircraft piston engines
Two-stroke aircraft piston engines