Arrow 500

The Arrow 500 is a twin-cylinder, horizontally opposed, two-stroke, single or dual ignition, aircraft engine that was 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.

The 500 is a conventional twin-cylinder engine that weighs 88 lb (40 kg). The engine features single or optional dual ignition, reed valve induction, free air cooling, tuned exhaust system, a single 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 500 produces 65 hp (48 kW), runs on premium unleaded auto fuel and has a recommended time between overhaul of 400 hours.^[1][2]

The tuned exhaust supplied with the engine has been criticized as "cumbersome" and needing modification to fit most aircraft.^[1]

Data from Cliche^[1]

• Type: Twin-cylinder, horizontally opposed two-stroke aircraft engine
• Displacement: 500 cc (30.51 cu in)
• Dry weight: 88 lb (40 kg)

• Valvetrain: reed valve
• Oil system: premixed oil and fuel
• Cooling system: air-cooled
• Reduction gear: gearbox

• Power output: 65 hp (48 kW)

• List of aircraft engines
• Hirth 2706
• Hirth 3202
• Rotax 532
• Rotax 582