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Gyro's was Groen Bros. DARPA Award
"boB" wrote in message
... Thanks Steve. That sounds like two forces working against each other. That doesn't seem to be efficient as far as strain on the systems. Something similar on my Sprint II with the engine and prop above the vertical CG. If the engine quits or even when throttling down the nose pops up which screwed up my landings early on. I had been fixed on the RAF2000 but hadn't really looked at the competition before. I appreciate all the advice. boB, SAG 70 Your welcome Bob! You're right, these forces are working against each other, and not in a good way. Designs like this have been flown for years and there are still people out there that insist that it's perfectly safe. They may have learned to deal with it but the unfortunate fact is that too many people have died because of the high thrust line designs that didn't have to. Personally, I wouldn't touch an RAF2000 with a 10 foot pole but the Groen Bros version of it looks like a very nice alternative if you've really got your heart set on a fully enclosed cabin. Of the more open designs around, I'm really impressed with the Air Command. They are one of the few kit manufacturers that had the guts and integrity to completely redesign their gyros when it finally became clear what the high thrust line issues were doing to the aircrafts stability. They don't sell anything now that's not centerline thrust and they offer a very reasonable upgrade kit for those who still have the older high thrust line gyros sitting in the barn. They also issued, if I'm not mistaken, and air worthiness directive to all owners of the old high thrust line machines, advising them to "not" fly until it's been converted to centerline thrust! Are you familiar with the PRA (Popular Rotorcraft Association)? They can be found at www.pra.org and are a great source of info on experimental gyros and helicopters. Also, check out this forum if you're not already familiar with it, http://www.rotaryforum.com/index.php Lots of really great people and good information. Just be aware that the gyro folks can be, shall we say, "passionate," about their machines so it sometimes helps to have a thick skin around there. ;-) Best of luck, Steve R. |
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