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The Hirth F-263 is a twin cylinder, in-line, two stroke, carburetted aircraft engine that was designed for use on ultralight aircraft. It was manufactured by Hirth of Germany, but was discontinued about 2001.[1]

Hirth F-263
Type	Twin cylinder two-stroke aircraft engine
National origin	Germany
Manufacturer	Hirth

Development

The F-263 uses fan cooling and piston-ported induction, with a single Bing carburetor and single capacitor discharge ignition. The cylinder walls are electrochemically coated with Nikasil. Standard starting is recoil start. A gearbox reduction drive system and electric start were factory options.[1]

The engine produces 31 hp (23 kW) and runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil. Recommended time between overhauls is 1000 hours.[1]

Applications

• Howland H-3 Pegasus[2]
• Falconar HM-293[3]

Specifications (F-263)

Data from Cliche[1]

General characteristics

• Type: Twin cylinder, two-stroke, aircraft engine
• Displacement: 383 cc (23.4 cu in)
• Dry weight: 70 lb (31.8 kg)

Components

• Valvetrain: piston-ported
• Fuel system: 1 X Bing carburetor
• Fuel type: unleaded 93 octane auto fuel
• Oil system: 50:1 fuel/oil premix
• Cooling system: fan forced air
• Reduction gear: optional gearbox

Performance

• Power output: 30 hp (22 kW)

See also

• Arrow 250
• Kawasaki 440

References

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