Arrow 250
{{Short description|Family of aircraft engines}}
| {{Infobox Aircraft Begin
| name=Arrow 250 | image= | caption= }}{{Infobox Aircraft Engine |type= Two-stroke aircraft engine |manufacturer=Arrow SNC |national origin=Italy |first run= |major applications= |produced= |number built= |program cost= |unit cost= |developed from= |variants with their own articles= }} |
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.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-1 Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 70. BAI Communications. {{ISBN|0-9636409-4-1}}
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. Arrow engines are no longer in production.
Development
The 250 is a conventional single-cylinder engine that weighs only {{convert|13|lb|kg|0|abbr=on}}. 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.
The tuned exhaust supplied with the engine has been criticized as "cumbersome" and needing modification to fit most aircraft.
Variants
Specifications (Arrow 250)
{{pistonspecs|
|type=Single-cylinder, two-stroke aircraft engine
|bore=
|stroke=
|displacement=250 cc (15.26 cu in)
|length=
|diameter=
|width=
|height=
|weight={{convert|13.2|lb|kg|0|abbr=on}}
|valvetrain=reed valve
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=
|oilsystem=premixed oil and fuel
|coolingsystem=air-cooled
|power={{convert|34|hp|kW|0|abbr=on}}
|specpower=
|compression=
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
|designer=
|reduction_gear=gearbox
|general_other=
|components_other=
|performance_other=
}}
See also
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