Hirth F-23

Hirth F-23
Type Twin cylinder two-stroke aircraft engine
National origin Germany
Manufacturer Hirth
Unit cost US$4423 (base price 2009)

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.[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

References

  1. ^ a b c d Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-3 Cybair Limited Publishing, 2001. ISBN 0-9680628-1-4
  2. ^ a b c d e Recreational Power Engineering (undated). "F-23 2 cycle 50hp". http://www.recpower.com/f23.htm. Retrieved 2009-12-16. 
  3. ^ Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 72. BAI Communications. ISBN 0-9636409-4-1

External links

Piston engines

HM 8 · HM 60 · HM 150 · HM 500 · HM 501 · HM 504 · HM 506 · HM 508 · HM 512 · HM 515
Two-strokes

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Gas turbines

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