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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 ...
Download as PDF; Printable version; In other projects ... Engines manufactured by Austrian company Rotax. ... Rotax 503; Rotax 532; Rotax 535; Rotax 582; Rotax 618;
Between 1985 and 1995, 60,000 Rotax engines were sold for aircraft propulsion. [2] In the light aircraft class, in 1998 Rotax outsold all other aero engine manufacturers combined. [4] Their four-stroke engines powered most U.S.-certified light sport aircraft when they first appeared around 2004. [5]
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.
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]
The Sparrow was available as a kit that includes a pre-welded fuselage and quick-build wings. The power range is 20 to 50 hp (15 to 37 kW) and the original standard engine specified was the 28 hp (21 kW) Rotax 277 with the 50 hp (37 kW) Rotax 503 as an
Two seats in side-by-side configuration, high wing ultralight, powered by an 80 hp (60 kW) Rotax 912UL engine, the 100 hp (75 kW) Rotax 912ULS or the 85 hp (63 kW) Jabiru 2200. The Xtra underwent an aerodynamic cleanup by aerodynamicist Barnaby Wainfan and was introduced in 1999. Variously marketed as the Mark III Xtra and the M3X. [5] [7]
The standard engine supplied was the twin cylinder, liquid-cooled, two-stroke, dual-ignition 64 hp (48 kW) Rotax 582 engine in pusher configuration. The 50 hp (37 kW) Rotax 503 and 40 hp (30 kW) Rotax 447 engines were factory options. [1] The aircraft fuselage is made from metal tubing, while the fairing is fiberglass. Its two-bladed rotor has ...