Most of the work needed done now is cosmetic. The main difference is the 447 is a larger bore. The reason for the use of the lighter cowling was to help US manufacturers in meeting the legal weight requirements. The Rotax … This is set is for 68 OVERSIZE bore late style 447 rotax. Simonini sets the World Bar in Singles with a 400cc 54hp@6500rpm. Page 28: Anti-Freeze Additives 65°C (150°F), and refill … Rotax 447 engine performance and data sheets pdf format Rotax 447 main jet correction chart pdf format Weight, dimensions and CG calculations for Rotax 2 stroke engines pdf format Rotax 277's were made 1980 to 2006/08. On aircraft equipped with engine cowlings the exit must be of sufficient size and in a low pressure area allowing the air to cool engine cabin and crankcase. Product information Package Dimensions 12 x 6 x 6 inches Item Weight 4 pounds Manufacturer aerolite ASIN B00M0YV0NK Item model number RTX447SO Best Sellers Rank #6,383,768 in Automotive (See Top 100 in Automotive) Weight is a serious issue if your 'Bee is to be 103 compliant. Howdy Folks, I purchased/inherited this unfinished 'Hummel' "UltraCruiser" ALL ALUMINUM ultralight with a new 447 ROTAX engine. I started doing some of the finish work, have ran the engine, done some taxiing around, it has a great "feel" to it. The Rotax 447 is a development of the Rotax 377, increasing the power output from 26 kW (35 hp) to 29.5 kW (40 hp) by increasing the cylinder bore from 62 mm to 67.5 mm and the maximum rpm from 6500 to 6800. more than the 447, so that alone would bust the 103 weight. The Rotax 377, 35 HP engine was later replaced by the 447, 40 HP engine. 250's and 377's, 440/447's, and 503's are Still made New in Russia. ... On the 377/447/503 engines little tabs are … Data from OPERATORS MANUAL FOR ENGINE TYPES 447, 503 & 582 General characteristics Type: two-stroke air-cooled aeroengine Bore: 72 mm (2.84 in) Stroke: 61 mm (2.4 in) Displacement: 496.7 cc (30.31 cu in) Dry weight: 31.4 kg (69 lb) (dry, no exhaust system) Components Valvetrain: piston ports Fuel system: pneumatic … The 503 weighs about 8 lb. ... Part 103 weight limits and fuel limits regulated ultralights to a premature death. 503's were made till 2003. The modern 447 has a single breakerless, magneto capacitor-discharge ignition (CDI) system. "IF" there was a 447 or 503 style engine avail with all the upgrades, Ceramic... Jump to content. Rotax 377/447. Kawasaki 440 and Suzuki 440's are still made last I knew. Rotax-Owner.com is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax … The 377 and 447 were both used in the sled market as well, and some of those engines have found their way into … You probably can save enough weight … No room for a prerotator. 11.2) Free air cooling (ROTAX 447 UL SCDI, ROTAX 503 UL DCDI) Means ram air cooling, for engines without fan. Two Strokes; ... 447 or 503 rotax comeback Sign in to follow this . Followers 2. ANOTHER 447 AND A 377 BOTH RUNNING IN GOOD CONDITION, Also have a t-bird II utralight 1 passenger aircraft with floaters & a T-Bird II ultralight Complete Engines for Sale 462 532 582 583 618 670 etc rotax engines thermostat #222-014 ultralight/hover (US $28.99) Rotax introduced a new engine cowling for use on the 377,447, and 503 engines which directs more air to the magneto cylinder, making for a cooler running engine. Dragon Wings blades weigh less than Rotordynes. Later the 447 was changed from points to Ducati ignition for the aircraft line. My stripped-down version came in at 251. The 103 weight later the 447 is a larger bore is cosmetic 's were 1980. And 503 's are Still made New in Russia ), and 's... From points to Ducati ignition for the aircraft line 103 weight limits and fuel limits regulated to. 440 and Suzuki 440 's are Still made last I knew the Rotax … Rotax 377/447 page 28 Anti-Freeze... 440 and Suzuki 440 's are Still made last I knew Bar in Singles with a 54hp! 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