Hirth 3701
Template:Short description Script error: No such module "Unsubst". Template:Use British English
Template:Wikidata imageTemplate:Infobox Aircraft Engine| Hirth 3701 |
|---|
The Hirth 3701 is an in-line three-cylinder, two-stroke, carburetted aircraft engine, with optional fuel injection, designed for use on ultralight aircraft and small homebuilts. It is manufactured by Hirth of Germany.[1][2]
Development
The 3701 was developed as a liquid-cooled and narrower installation alternative to the four-cylinder Hirth F-30 air-cooled engine of Script error: No such module "convert"..[1][2]
The 3701 features triple Bing 34 mm slide carburetors or optionally fuel injection. The cylinder walls are electrochemically coated with Nikasil. Standard starting is electric start and recoil start is not available as an option. The reduction drive system available is the G-50 gearbox, with reduction ratios of 2.16:1, 2.29:1, 2.59:1, 3.16:1, or 3.65:1.[1]
The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil, or optionally 100:1 oil injection.[1]
Variants
- 3701 high-torque/low-rpm engine
- Three-cylinder in-line, two-stroke aircraft engine with three Bing 34 mm slide carburetors or fuel injection. Low piston port timing produces Script error: No such module "convert". at 4950 rpm with a very flat torque curve.[1]
- 3701 high-performance engine
- Three-cylinder in-line, two stroke aircraft engine with three Bing 34 mm slide carburetors or fuel injection. High piston port timing produces Script error: No such module "convert". at 6000 rpm with a steep torque curve.[1]
Applications
Script error: No such module "Template wrapper".Script error: No such module "Check for unknown parameters".
Specifications (3701 high performance)
Data from Recreational Power Engineering[1]
General characteristics
- Type: Three-cylinder, two-stroke, in-line, aircraft engine
- Bore: Script error: No such module "convert".
- Stroke: Script error: No such module "convert".
- Displacement: 939 cc (57.3 cu in)
- Length: Script error: No such module "convert".
- Width: Script error: No such module "convert".
- Height: Script error: No such module "convert".
- Dry weight: Script error: No such module "convert"., including electric starter and exhaust system. With optional gearbox total weight is Script error: No such module "convert"., plus radiator.
Components
- Valvetrain: piston ported
- Fuel system: 3 X Bing 34 mm slide type carburetors or fuel injection
- Fuel type: unleaded 93 octane auto fuel
- Oil system: 50:1 fuel/oil premix or oil injection
- Cooling system: liquid
- Reduction gear: G-50 gearbox with reduction ratios of 2.16:1, 2.29:1, 2.59:1, 3.16:1, or 3.65:1
Performance
- Power output: Script error: No such module "convert". at 6000 rpm
- Compression ratio: 9.5:1
See also
References
<templatestyles src="Reflist/styles.css" />
Script error: No such module "Check for unknown parameters".
External links
- Script error: No such module "Official website".Script error: No such module "Check for unknown parameters". on Archive.org
Script error: No such module "Navbox".