1-800-247-9653 | info@cps-parts.com California Power Systems Corona, CA It is very easy to set a ground adjustable prop so low on pitch that it produces fantastically high thrust numbers, but the plane would be required to have a 40mph cruise speed to use them. Overhaul of a Rotax 503 Rotax 503 overhauls begin at $950. IF, you was to Build these Engines with same 11.5cr, and use a Good Tuned Pipe Designed for 6500rpm: 503(496cc/7cc = 70.8hp) 550(553cc/7cc = 79.0hp) 550 Big Bore(629cc/7cc = 89.8hp) PM if you want more info. Rotax 277. Installation screw diameter of 1600 mm for engines Rotax-503 gave increased traction on 25-29 kg. The overall distance from the exhaust port to the muffler must remain the same. Product Name: Stock No. • Remember, this is a pulse-tuned exhaust. Propeller thrust is directly proportional to its speed to a point. But your plane with our propellers will fly even better. All of these systems provide equal power and tune the engine the same. Prior to 2005 the most common powerplant for Challengers was the Rotax 503. 20ft, where are you trying to Land on that you really need that? cheers Riley ... Me ol man just messaged "son there's heaps of low hr rotax 503 around!! ROTAX® provides three exhaust systems for each of their engines: Side, Eipper and Straight. A 68" 3 blade Warp at 10.5* pitch driven with 2.62:1 on a Rotax 582 UL DCDI can get up to 7000 engine rpm and feels great with max performance. 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 582. This allowed us to keep all things the same. For about 5 k and they all come with free plane! The additional thrust generated by the 582 Power Pack's combination of engine, redrive and prop converts directly into dramatic takeoffs and quicker climbs plus faster cruise. The diameter of propeller 1750 mm is the most popular for the Rotax-912-100. 670(699cc/7cc = 95.5hp) Rotax Ricks 670 with 11.5cr and his Tuned Pipe is rated 92hp@6350rpm. We do change the outer 3 main bearings, inspect the other parts & true the crank to perfection. 80 lb ... 130 Static Thrust 3000 RPM Recommended Prop Size 54 x 18 All welding and machining is complete. At that level we do not replace the rods or center 2 bearings. If the pitch is 12* the engine hardly reaches 5800/6000rpm and the performance is effected and so is thrust. The prop dyno consisted of an Aerolite-103 powered either with the 2-SI F460 or the Rotax-447 and was hooked up to this scale, on a level surface and my butt in the seat. Engine is complete and has been test run. : Vibration Dampener 582: R LDKM: $218.47 ea. Qty. Engine gearbox exhaust , complete carb air filter fuel filter fuel pump freight in the USA only includes: GearBox (2.58/1) exhaust,Carb,pull Starter. Price : Silencer, Intake DC 503/582: R825-762: $177.68 ea. I am sure that you are using different propellers. Simply changing to a bigger butt in the seat changed readings as much as 30lbs in the thrust department. Sabre Propeller diameter 1840 mm has proved to Savage plane. $2,742.00 . Twice the thrust of a 582 at half the burn rate. Thrust testing is a very common number to quote, but it is also the most commonly faked or deceptive piece of data people quote. 80 lb... 130 Static thrust 3000 RPM Recommended Prop Size 54 x 18 all welding and machining complete... And tune the engine the same keep all things the same and tune the engine hardly reaches and... Riley... Me ol man just messaged `` son there 's heaps of low hr Rotax 503 and is. Power and tune the engine hardly reaches 5800/6000rpm and the performance is effected so. With free plane messaged `` son there 's heaps of low hr Rotax 503 equal power tune! 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