Arrow 250

Family of aircraft engines

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

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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

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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)

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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)

## See also

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* List of aircraft engines
* Hirth F-263
* Rotax 377

## References

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1. ^ a b c d e f Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-1 Cybair Limited Publishing, 2001. ISBN 0-9680628-1-4
2. ^ a b Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 70. BAI Communications. ISBN 0-9636409-4-1

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Arrow SNC aircraft engines

Aircraft engines|

* 250
* 270
* 500
* 1000

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