Hirth F-33
| Hirth F-33 | |
|---|---|
| |
| Type | Single cylinder two-stroke aircraft engine
|
| National origin | Germany |
| Manufacturer | Hirth |
The Hirth F-33 is a
ultralight aircraft, including powered paragliders and ultralight trikes. the engine is noted for its extremely light base weight of 35 lb (16 kg). It is manufactured by Hirth of Germany.[1][2][3]
Development
The F-33 was intended to fill the niche previously occupied by the now out-of-production 28 hp (21 kW)
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-33 produces 22 hp (16 kW) at 5200 rpm and 28 hp (21 kW) at 6500 rpm.[1][2]
Applications
- 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)
Data from Recreational Power Engineering[2]
General characteristics
- Type: Single cylinder, two-stroke, aircraft engine
- Bore: 76 mm (3.0 in)
- Stroke: 69 mm (2.7 in)
- Displacement: 313 cc (19.1 cu in)
- Length: 300 mm (11.8 in)
- Width: 299.5 mm (11.8 in)
- Height: 380 mm (15.0 in)
- Dry weight: 31 lb (14.1 kg) (base weight) 45 lb (20.4 kg) (with electric start and reduction drive)
Components
- Valvetrain: Reed valve, piston-ported
- Fuel system: 1 X Bing 34mm slide or optional diaphragm type carburetor or fuel injection
- Fuel type: Minimum of unleaded 93 octane auto fuel
- Oil system: 50:1 fuel-oil premix
- Cooling system: free air
- Reduction gear: four element cog belt
Performance
- Power output: 28 hp (21 kW) at 6500 rpm
- Compression ratio: 9.5:1
- Power-to-weight ratio: 0.8
References
- ^ ISBN 0-9680628-1-4
- ^ a b c d e Recreational Power Engineering (n.d.). "F-33 2 cycle 28hp". Retrieved 17 January 2013.
- ISBN 0-9636409-4-1