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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 ...
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.
Download as PDF; Printable version; ... Engines manufactured by Austrian company Rotax. ... Rotax 503; Rotax 532; Rotax 535; Rotax 582; Rotax 618; Rotax 912;
In 2009 the standard recommended engine was the Rotax 447, with the 46 hp (34 kW) Rotax 503 single carburettor engine optional. [ 6 ] [ 12 ] In 2021 an electric aircraft option was added as the manufacturer offered a complete electric drivetrain and up to four batteries as an alternative to gasoline powerplants.
Standard engine is the 50 hp (37 kW) Rotax 503 with the 64 hp (48 kW) Rotax 582 as an option. [6] Phantom I-E Single seat ultralight aircraft with struts in place of cable-bracing and enclosed cockpit with removable doors. Standard engine is the 50 hp (37 kW) Rotax 503 with the 64 hp (48 kW) Rotax 582 as an option. [6] Phantom II
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.
Open-cockpit, conventional landing gear, ultralight trainer with two seats in tandem, standard engine is the Rotax 503 of 50 hp (37 kW) with the Rotax 582 of 64 hp (48 kW), 80 hp (60 kW) or the Rotax 912UL of 100 hp (75 kW) optional. The aircraft uses the wings, tailboom and tail of the S-12XL, but is fitted with a new steel tube cockpit structure.