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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. [1] [3]
Calumet Motorsports was an American aircraft parts manufacturer and former aircraft kit manufacturer based in Lansing, Illinois, and founded by Tommy Milton.The company specialized in the design and manufacture of autogyro parts and at one time produced whole aircraft kits for amateur construction in the US including FAR 103 Ultralight Vehicles category.
The original basic engine was the Rotax 277 of 28 hp (21 kW), with the Rotax 447 of 40 hp (30 kW) and the Rotax 503 of 50 hp (37 kW) available later as options. [ 1 ] [ 2 ] [ 11 ] The Coyote II two-seater was later developed from the S-5.
The company was founded by Bill Raisner in Peyton, Colorado, in the 1980s and claims to be the oldest ultralight aircraft parts supplier. The company specializes in the provision of aircraft parts and aircraft engines and in the past supplied kit aircraft for amateur construction and ready-to-fly aircraft under the US FAR 103 Ultralight ...
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.