| 词条 | Hirth F-23 | ||||||||||||||
| 释义 |
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] DevelopmentThe F-23 is intended to compete with the {{convert|50|hp|kW|0|abbr=on}} 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 {{convert|50|hp|kW|0|abbr=on}} at 6150 rpm and {{convert|40|hp|kW|0|abbr=on}} at 5500 rpm.[1][2] Applications{{columns-list|colwidth=30em|
}} Specifications (F-23){{pistonspecs||ref=Recreational Power Engineering[2] |type=Twin cylinder, two-stroke, aircraft engine |bore={{convert|72|mm|in|1|abbr=on}} |stroke={{convert|64|mm|in|1|abbr=on}} |displacement=521 cc (31.8 cu in) |length={{convert|247|mm|in|1|abbr=on}} |diameter= |width={{convert|570|mm|in|1|abbr=on}} |height={{convert|338|mm|in|1|abbr=on}} |weight={{convert|84|lb|kg|1|abbr=on}} including reduction unit, full exhaust system and electric start |valvetrain= piston-ported |supercharger= |turbocharger= |fuelsystem=2 X Bing 34mm slide or optional diaphragm type carburetor or fuel injection |fueltype=unleaded 93 octane auto fuel |oilsystem=50:1 fuel/oil premix |coolingsystem=free air |power={{convert|50|hp|kW|0|abbr=on}} at 6150 rpm |specpower= |compression=9.5:1 |fuelcon= |specfuelcon= |oilcon= |power/weight= |designer= |reduction_gear= cog belt with 1.8:1, 2.2:1 and 2.5:1 ratios optional |general_other= |components_other= |performance_other= }}{{aircontent |see also= |related= |similar aircraft= |lists= }} References1. ^1 2 3 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 {{cite web|url = http://www.recpower.com/F-23%202%20cycle%2050hp.htm|title = F-23 2 cycle 50hp |accessdate = 17 January 2013|last = Recreational Power Engineering |authorlink = |year = n.d.}} 3. ^Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 72. BAI Communications. {{ISBN|0-9636409-4-1}} External links
3 : Hirth aircraft engines|Air-cooled aircraft piston engines|Two-stroke aircraft piston engines |
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