Arrow 250
| Industry | Aerospace |
|---|---|
| Fate | Production ceased |
| Headquarters | Italy |
| Products | Aircraft engines |
The Arrow 250 series consists of single-cylinder, two-stroke, single- or dual-ignition aircraft engines engineered by Arrow SNC in Italy specifically for use in ultralight aircraft applications.[1][2]
This engine family employs a modular construction approach, utilizing identical pistons, cylinders, and gearboxes arranged around various crankcase designs to produce configurations ranging from one to four cylinders.[1] Production of Arrow engines has since ceased.
Development
The 250 model is a traditional single-cylinder powerplant with a weight of just 13 lb (6 kg). It offers either single or optional dual ignition systems, reed valve induction, natural air cooling, and a tuned exhaust setup. Fuel delivery is managed through a slide venturi Bing carburetor combined with a fuel pump, while the cylinder walls are coated with Nikasil for enhanced durability. A gearbox reduction drive featuring a one-way clutch is available as an option. Starting is facilitated by an electric starter; however, there is no recoil starter included.[1]
Users have noted that the supplied tuned exhaust system can be bulky and often requires modification to properly fit various aircraft installations.[1]
Variants
- 250
- A gasoline-powered aircraft engine delivering approximately 34 hp (25 kW). This variant is no longer manufactured.[1]
- 270 AC
- This gasoline engine produces around 35 hp (26 kW) at 6800 rpm and weighs 13.2 lb (6.0 kg) including carburetor, alternator, fuel pump, and starter. Production has been discontinued.[2]