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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 ...
The initial engine recommended for the design was the now out-of-production 28 hp (21 kW) Rotax 277. Recommended engines today include 40 hp (30 kW) Rotax 447 and the 50 hp (37 kW) Rotax 503 . Kit options include brakes, an extra 5 US gal (19 L) fuel tank, spoked wheels, floats and skis.
Up-engined model with a 50 hp (37 kW) Rotax 503 engine, many extras and an empty weight of 330 lb (150 kg) for the US amateur-built category. [9] [10] [1] Weedhopper II Current production two seat side-by-side seating model with a 50 hp (37 kW) Rotax 503 engine. Also known as the Weedhopper Two Place.
The aircraft's installed power range is 52 to 75 hp (39 to 56 kW) and the standard engine is the 52 hp (39 kW) Rotax 503, although the 70 hp (52 kW) 2si 540 has also been used. [ 1 ] [ 2 ] [ 3 ] The PT2S is only offered as plans and the designer estimates it will take 500 hours to complete the aircraft.
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.
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.
The aircraft has a standard empty weight of 252 lb (114 kg). It features a single main rotor, a single-seat open cockpit without a windshield, tricycle landing gear and a twin cylinder, air-cooled, two-stroke, single-ignition 50 hp (37 kW) Rotax 503 engine in pusher configuration. [1] [3] [4]
The standard engine supplied is the Rotax 503 50 hp (37 kW) twin cylinder, two-stroke, air-cooled aircraft engine. Wings used include the Aquilla 150 sq ft (14 m 2) and 177 sq ft (16.4 m 2). [1] In the early 2000s the company had planned to phase the Windlass out, but customer demand has kept the model in production through 2012. [3]