Beastus_Maximus Posted July 31, 2008 Share Posted July 31, 2008 I have been looking around at engines for sale, I have found more than a few Continental IO-470-L's and IO-550-B's Initially I was planning on going with a IO-360, but all the ones I keep finding for sale have been involved in a prop strike for some strange reason. In comparison, I know that we are talking two heavier 6 cylinder engines verses a lighter 4 banger. I also know that they will both burn more fuel. The specs for the IO-470-L put it at 260 HP weighing 411 lbs. It is 43.17 inches long, 33.56 Wide, and 19.75 inches tall. The specs for the IO-550-B put it at 300 HP weighing 406 Lbs. It is 37.97 inches long, 33.56 inches wide, and 27.32 inches tall. The specs for the IO-360 put it at 200 HP, 300 lbs. It is 29.81 inches long, 32.24 inches wide, 22.99 inches tall. So a minimum gain of 60 horsepower, maximum of 100 would add at the most 111 lbs to the aircraft. The shortest configuration is the IO-550-B, Ironically it is also the lighter and more powerful of the two. I am planning on building using the Infinity retractable gear Which according to them will allow you to run a 72" prop. My concept is a extended nose Long Ez, with the IO-550-B and a 72" 3 blade prop. This would make for a 300 HP constant that based on my estimates on articles that I have read would get on down the way at about 15.6 GPH at high cruse, and 13.9 rolled back for some economy. Those are the numbers AOPA posts for a 206 with a IO-550 conversion. So conceivably these would be the worst case numbers. Also, to help with the weight and balance issues, I am 265 lbs in my skivvies, I will always inhabit the front seat, if you figure in my weight over what a standard FAA 170 pounder is which I am assuming is what the aircraft was designed around, it would put an additional 95 LBS of *ahem* ballast in the front. If I figure in a max weight for 110 lbs for the GIB, I am figuring this will make the total weight added to the "design" less the added weight for the lengthening of the fuselage about 141 lbs with both seats occupied for a gain of 100 horse power! I am thinking it is doable because with the Berkut the option to run a IO-540 Lycoming was offered, which actually weighs depending on the model 25-41 lbs more than the Continental. Also in my research comparing a LEZ to a Berkut, it appears to me that the main differences are fuselage construction, the Berkut is molded, the LEZ is one off fiberglass over carved foam. The Berkut uses the Roncz 1145MS Airfoil made from carbon fiber, and the wing is a LEZ wing with a straightened trailing edge, a enlarged aileron and is constructed out of carbon fiber. From what I have found searching around, it has been claimed that a Berkut with the IO-540 in level flight under the right circumstances will hit 300+ MPH. In comparison the Berkut has a larger canopy, and it would appear a larger fuselage profile than the LEZ, I am considering that with the 300 hp engine, and all of the other aforementioned mods, along with the shorter Long Ez canopy, I could potentially have an aircraft that would Cruise at 240-250 knots. Assuming I could pull 240 Knots out of it, with 55 gallons of usable fuel on board, Consuming 13.9 per hour, that would give a range of 828 NM, and would get there in just under 3.5 hours! This is with a 30 minute reserve. If I could extend the fuel capacity to 74 Gallons, as with the Berkut this would pump that range up to 1156 NM, and get there in 4.82 hours, again with a 30 minute reserve. So wanting to see how this works out on a map, I made one with my 3 major centers of opperation, Corpus Christi, Tx, Livingston, Mt, and Lancaster, Ca. I am thinking it would be a pretty outstanding bird if it all came to fruition. What do you all think? Quote We make no mistakes, ONLY INNOVATIONS! Link to comment Share on other sites More sharing options...
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