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The Rotax 503 is a 37 kW (50 hp), inline 2-cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft. [1] [2] For decades the engine was one of the most popular and reputedly reliable aircraft engines in its class (two-stroke, under 60 horsepower), [3] and it remains widely used and ...
Rotax is the brand name for a range of internal combustion engines developed and manufactured by the Austrian company BRP-Rotax GmbH & Co KG [1] (until 2016 BRP-Powertrain GmbH & Co. KG), in turn owned by the Canadian Bombardier Recreational Products (BRP). Under the Rotax brand, the company is one of the world's largest producers of light ...
The aircraft has a standard empty weight of 220 lb (100 kg). It features a parachute-style high-wing, single-place accommodation, tricycle landing gear and a single 40 hp (30 kW) Rotax 447 engine in pusher configuration. The 50 hp (37 kW) Rotax 503 engine was a factory option. [1] [2]
The F-23 is intended to compete with the 50 hp (37 kW) Rotax 503 and is differentiated from the Rotax powerplant by offering a horizontally-opposed cylinder layout. The F-23 uses free air cooling and piston-ported induction, with dual Bing 34mm slide or optional diaphragm type carburetors.
The standard engine supplied is the Rotax 582 64 hp (48 kW) twin cylinder, two-stroke, liquid-cooled aircraft engine. The Rotax 503 50 hp (37 kW) air-cooled two-stroke engine and the four-stroke HKS 700E 60 hp (45 kW) and Rotax 912UL of 80 hp (60 kW) are also available.
The Firestar was intended to be a FAR 103 legal ultralight when powered by the 28 hp (21 kW) Rotax 277 engine. The 40 hp (30 kW) Rotax 447 or the 50 hp (37 kW) Rotax 503 were optional engines, although the aircraft then falls into the US Experimental - amateur-built category.
Birdman Chinook 2S showing the pentagonal cockpit cross-section Birdman Chinook 2S Birdman Chinook 2S cockpit Birdman Chinook 2S Rotax 503 engine installation. The Birdman Chinook is a family of single and two-place, pusher configuration, high-wing ultralight aircraft that was first flown on 12 December 1982 and produced by Birdman Enterprises of Edmonton, Alberta, Canada, starting in 1983.
40 hp (30 kW) Rotax 447 air-cooled engine. [4] Shadow C (1988) 50 hp (37 kW) Rotax 503 air-cooled engine. Streamlined struts. [4] Shadow D 65 hp (48 kW) Rotax 582 liquid-cooled engine. [4] Dual control standard. [2] Shadow E Similar to the D series but with either Rotax 582 or 80 hp (60 kW) Rotax 912 liquid-cooled engine, electric starter and ...