Hirth F-33
{{Short description|German two-stroke aircraft engine}}
{{Use dmy dates|date=January 2022}}
{{Use British English|date=January 2022}}
| {{Infobox Aircraft Begin
| name=Hirth F-33 | image=HirthF33.jpg | caption= }}{{Infobox Aircraft Engine |type=Single cylinder two-stroke aircraft engine |manufacturer=Hirth |national origin=Germany |first run= |major applications= |produced= |number built= |developed from= |variants with their own articles= }} |
The Hirth F-33 is a single cylinder, two stroke, carburetted aircraft engine designed for use on ultralight aircraft, including powered paragliders and ultralight trikes. the engine is noted for its extremely light base weight of {{convert|35|lb|kg|0|abbr=on}}. It is manufactured by Hirth of Germany.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-3 Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}{{cite web|url = http://www.recpower.com/F-33%202%20cycle%2028hp.htm|title = F-33 2 cycle 28hp |access-date = 17 January 2013|last = Recreational Power Engineering |year = n.d.}}Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 72. BAI Communications. {{ISBN|0-9636409-4-1}}
Development
The F-33 was intended to fill the niche previously occupied by the now out-of-production {{convert|28|hp|kW|0|abbr=on}} Rotax 277. The F-33 uses free air cooling, dual capacitor discharge ignition and reed valve induction, with a single Bing 34mm slide or optional diaphragm type carburetor. 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.
The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil. Recommended time between overhauls is 1000 hours.
The F-33 produces {{convert|22|hp|kW|0|abbr=on}} at 5200 rpm and {{convert|28|hp|kW|0|abbr=on}} at 6500 rpm.
Applications
{{columns-list|colwidth=22em|
- Aerosport OY Spider
- Aerolite 103
- Alpaero Exel
- Ameri-Cana Eureka
- APEV Pouchel II
- Arey Tatush
- Av8er Explorer
- Belite Aircraft Superlite
- Büttner Crazy Flyer
- Büttner Crazy Plane
- DAR Solo
- Earthstar Gull 2000
- Escapade Kid
- Fisher Avenger
- Fisher FP-505 Skeeter
- Fisher FP-606 Sky Baby
- Fresh Breeze Airbass Monster
- Fresh Breeze Flyke
- Fresh Breeze Respect Monster
- Fresh Breeze Monster
- Ivanov ZJ-Viera
- JDT 1030F MAX-103
- JDT 1100F Mini-MAX
- Howland H-3 Pegasus
- Hummel CA-2
- M-Squared Breese XL
- Paladin Sparrow
- Phoenix Skywalker 330
- Pipistrel Apis-Bee
- PowerTrike Light
- Quad City Challenger
- Roll Flight MR V
- SDB Karat
- Silent Family Silent Glider M
- Spacek SD-1 Minisport
- Spartan BP Parawing
- Spartan DFS Paramotor
- Spartan DFS Trike
- Sperwill ST
- TeST TST-3 Alpin T
- Trio-Twister 103
- Wings of Freedom Flitplane
- Wood Sky Pup
}}
Specifications (F-33)
{{pistonspecs|
|ref=Recreational Power Engineering
|type=Single cylinder, two-stroke, aircraft engine
|bore={{convert|76|mm|in|1|abbr=on}}
|stroke={{convert|69|mm|in|1|abbr=on}}
|displacement=313 cc (19.1 cu in)
|length={{convert|300|mm|in|1|abbr=on}}
|diameter=
|width={{convert|299.5|mm|in|1|abbr=on}}
|height={{convert|380|mm|in|1|abbr=on}}
|weight={{convert|31|lb|kg|1|abbr=on}} (base weight) {{convert|45|lb|kg|1|abbr=on}} (with electric start and reduction drive)
|valvetrain=Reed valve, piston-ported
|supercharger=
|turbocharger=
|fuelsystem=1 X Bing 34mm slide or optional diaphragm type carburetor or fuel injection
|fueltype=Minimum of unleaded 93 octane auto fuel
|oilsystem=50:1 fuel-oil premix
|coolingsystem=free air
|power={{convert|28|hp|kW|0|abbr=on}} at 6500 rpm
|specpower=
|compression=9.5:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=0.8
|designer=
|reduction_gear=four element cog belt
|general_other=
|components_other=
|performance_other=
}}
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
}}
References
{{Reflist}}
External links
- {{Official website|https://hirthengines.com/2-stroke-engines/33-series}}
{{Hirth aeroengines}}
Category:Hirth aircraft engines