Zenoah G-25

Last updated
Zenoah G-25
Type Single cylinder two-stroke aircraft engine
National origin Japan
Manufacturer Zenoah
Unit cost US$2172 (2000 price, complete, used)

The Zenoah G-25 is a single cylinder, two stroke, carburetted aircraft engine, with optional fuel injection, designed for use on ultralight aircraft [1] [2]

Carburetor device that mixes air and fuel for internal combustion engines

A carburetor or carburettor is a device that mixes air and fuel for internal combustion engines in the proper air–fuel ratio for combustion. It is sometimes colloquially shortened to carb in the UK and North America or carby in Australia. To carburate or carburet means to mix the air and fuel or to equip with a carburetor for that purpose.

Fuel injection

Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector.

Contents

Development

The Zenoah G-25 is equipped with single capacitor discharge ignition and a single Mikuni slide-type carburetor. It is equipped with a recoil starter system or optionally electric start and a 2.5 or 2.8:1 belt reduction drive. [1] [2] [3]

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 was originally developed to overcome the long charging times associated with high inductance coils used in inductive discharge ignition (IDI) systems, making the ignition system more suitable for high engine speeds. The capacitive-discharge ignition uses capacitor discharge current to the coil to fire the spark plugs.

Mikuni (company)

Mikuni Corporation is a Japanese carburetor manufacturing company. Their business activities is focused on carburetors, fuel injectors and other automobile and motorcycle related equipment.

The engine runs on a mixture of unleaded auto fuel and oil. [1] [2]

Producing 22 hp (16 kW) at 6600 rpm, the G-25 competed in the early 1980s ultralight powerplant market against the similar Rotax 277. Production of the engine was completed in the late 1980s and today only used engines and parts are available. [1] [2]

The Rotax 277 is a 26 hp (19 kW), single-cylinder, two-stroke aircraft engine, that was built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft.

Applications

The Adventure F series is a family of French paramotor designs that was designed and produced by Adventure SA of Méré, Yonne, for powered paragliding.

Aerodyne Systems Vector

The Aerodyne Systems Vector is a family of American ultralight aircraft that was designed by Berndt Petterson, Mike McCarron and Paul Yarnell and produced by Aerodyne Systems, introduced in 1982. The aircraft was supplied as a kit for amateur construction.

AmeriPlanes Mitchell Wing A-10

The Mitchell Wing A-10 and T-10 are a family of American cantilever, tricycle landing gear, high-wing, pusher configuration, one and two seat ultralight aircraft designed for amateur construction or supplied as completed aircraft. The aircraft were designed by Don Mitchell and were produced by a number of companies, the last being AmeriPlanes of Truro, Iowa.

Specifications (G-25B-1)

Data from Cliche & Tennessee Propellers [1] [2]

General characteristics

Components

Valvetrain mechanical system that controls operation of the valves in an internal combustion engine

A valvetrain or valve train is a mechanical system that controls operation of the valves in an internal combustion engine, whereby a sequence of components transmits motion throughout the assembly.

Propeller speed reduction unit

A propeller speed reduction unit is a gearbox or a belt and pulley device used to reduce the output revolutions per minute (rpm) from the higher input rpm of the powerplant. This allows the use of small displacement internal combustion automotive engines to turn aircraft propellers within an efficient speed range.

Performance

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References

  1. 1 2 3 4 5 Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-8 Cybair Limited Publishing, 2001. ISBN   0-9680628-1-4
  2. 1 2 3 4 5 Tennessee Propellers (n.d.). "Zenoah Engines" . Retrieved 2009-12-24.
  3. ↑ Tennessee Propellers (2000). "Zenoah Engine Retail Pricing" . Retrieved 2009-12-24.


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