Hirth F-23

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Hirth F-23
TypeTwin cylinder two-stroke aircraft engine
National origin Germany
Manufacturer Hirth

The Hirth F-23 is a twin cylinder, horizontally-opposed, two stroke, carburetted or optionally fuel injected aircraft engine designed for use on ultralight aircraft. It is manufactured by Hirth of Germany. [1] [2] [3]

Contents

Development

The F-23 is intended to compete with the 50 hp (37 kW) Rotax 503 and is differentiated from the Rotax powerplant by offering a horizontally-opposed cylinder layout. The F-23 uses free air cooling and piston-ported induction, with dual Bing 34mm slide or optional diaphragm type carburetors. The cylinder walls are electrochemically coated with Nikasil. Standard starting is recoil start. A belt reduction drive system, fuel injection, tuned exhaust and electric start are optional. [1] [2]

The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil. Recommended time between overhauls is 1000 hours. [1] [2]

The F-23 produces 50 hp (37 kW) at 6150 rpm and 40 hp (30 kW) at 5500 rpm. [1] [2]

Applications

Specifications (F-23)

Data from Recreational Power Engineering [2]

General characteristics

Components

Performance

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References

  1. 1 2 3 4 Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-3 Cybair Limited Publishing, 2001. ISBN   0-9680628-1-4
  2. 1 2 3 4 5 Recreational Power Engineering (n.d.). "F-23 2 cycle 50hp" . Retrieved 17 January 2013.
  3. ↑ Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 72. BAI Communications. ISBN   0-9636409-4-1
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