| Manufacturer | Hirth |
|---|---|
| National origin | Germany |
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]
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
- Aeronix Airelle
- Air Sports AIRector 120
- Aurore MB 02-2 Mini Bulle
- DAR-23
- Fisher FP-303
- Monnett Moni - motorglider
- Rotorschmiede VA115
- Sadler Vampire
- Solid Air Diamant LP
- Spacek SD-1 Minisport
- TechProAviation Merlin 100
- Team Mini-Max AeroMax
- TeST TST-1 Alpin
- Wings of Freedom Phoenix 103
References
- ^ Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-3 Cybair Limited Publishing, 2001. ISBN 0-9680628-1-4
- ^ Recreational Power Engineering (n.d.). "F-23 2 cycle 50hp". Retrieved 17 January 2013.
- ^ Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 72. BAI Communications. ISBN 0-9636409-4-1