Arrow 250
| Arrow 250 | |
|---|---|
| Type | Two-stroke aircraft engine |
| National origin | Italy |
| Manufacturer | Arrow SNC |
|
| |
The Arrow 250 is a family of single-cylinder, two-stroke, single- or dual-ignition aircraft engines that were designed for ultralight aircraft by Arrow SNC of Italy.[1][2]
The Arrow family of engines are modular in design and share the same pistons, cylinders and gearboxes assembled around different crankcase designs, giving one-, two- or four-cylinder engines.[1] Arrow engines are no longer in production.
Development
The 250 is a conventional single-cylinder engine that weighs only 13 lb (6 kg). The engine features single- or optional dual-ignition, reed valve induction, free air cooling, tuned exhaust system, a slide venturi-type Bing carburetor, fuel pump, Nikasil cylinder coatings. The engine was offered with a gearbox reduction system that included a one-way clutch. Starting is electric starter with no provision for a recoil starter.[1]
The tuned exhaust supplied with the engine has been criticized as "cumbersome" and needing modification to fit most aircraft.[1]
Variants
- 250
- Gasoline aircraft engine, 34 hp (25 kW). Out of production.[1]
- 270 AC
- Gasoline aircraft engine, 35 hp (26 kW) at 6800 rpm, weight 13.2 lb (6.0 kg) with carburetor, alternator, fuel pump and starter. Out of production.[2]
Specifications (Arrow 250)
Data from Cliche[1]
General characteristics
- Type: Single-cylinder, two-stroke aircraft engine
- Displacement: 250 cc (15.26 cu in)
- Dry weight: 13.2 lb (6 kg)
Components
- Valvetrain: reed valve
- Oil system: premixed oil and fuel
- Cooling system: air-cooled
- Reduction gear: gearbox
Performance
- Power output: 34 hp (25 kW)