The Rotax 377, 35 HP engine was later replaced by the 447, 40 HP engine. "IF" there was a 447 or 503 style engine avail with all the upgrades, Ceramic... Jump to content. Most of the work needed done now is cosmetic. ... Part 103 weight limits and fuel limits regulated ultralights to a premature death. Dragon Wings blades weigh less than Rotordynes. The reason for the use of the lighter cowling was to help US manufacturers in meeting the legal weight requirements. 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. Page 28: Anti-Freeze Additives 65°C (150°F), and refill … You probably can save enough weight … 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 … Two Strokes; ... 447 or 503 rotax comeback Sign in to follow this . The Rotax … I started doing some of the finish work, have ran the engine, done some taxiing around, it has a great "feel" to it. The modern 447 has a single breakerless, magneto capacitor-discharge ignition (CDI) system. 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. Rotax 377/447. Followers 2. The main difference is the 447 is a larger bore. Kawasaki 440 and Suzuki 440's are still made last I knew. Simonini sets the World Bar in Singles with a 400cc 54hp@6500rpm. No room for a prerotator. My stripped-down version came in at 251. ... On the 377/447/503 engines little tabs are … 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) 250's and 377's, 440/447's, and 503's are Still made New in Russia. 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 … more than the 447, so that alone would bust the 103 weight. 11.2) Free air cooling (ROTAX 447 UL SCDI, ROTAX 503 UL DCDI) Means ram air cooling, for engines without fan. The 503 weighs about 8 lb. The 377 and 447 were both used in the sled market as well, and some of those engines have found their way into … 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. 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. 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) Later the 447 was changed from points to Ducati ignition for the aircraft line. 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 This is set is for 68 OVERSIZE bore late style 447 rotax. Rotax 277's were made 1980 to 2006/08. 503's were made till 2003.