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On Nov 20, 8:39*am, Scott Alexander
wrote: A friend in my club built a pair of winglets for his Standard Cirrus. His glider is expirmental, mine is not. *The total cost for him was just a hundred dollars for supplies, and some free guidance from a local IA/AP. *The finished product looks fantastic! *The mold came from an American Spirit, which I believe is a copy of the Ventus. *And the result is that his handling has improved quite a bit. *He did do some adjustments on the toe-out angle to fine tune it which supposively helped. I would like to do the same thing with mine using the exact same molds. *My Cirrus is a standard airworthiness certificate. *If I were to do the factory winglet or the Maughmer winglet, the cost is between 3,000-5,000 when it's all said and done. *So that being said, this option, looks very appealing. Has anyone in this group dealt with the same sort of deal? *I would be willing to change my standard airworthiness certificate over to an expiremental if that is the best solution. *Any guidance is much appreciated. Thanks, Scott PS Happy Thanksgiving. None of these winglets appear to have STCs so the installation in a type certificated glider will be via 337/field approval (I doubt you'll find an A&P who would claim adding a winglet is a "minor alteration" although there could be corner cases...). Since likely you need an A&P/IA to file a 337 and work with your local FSDO that is where I'd start. OTOH if you can get a pair of winglets for $3k out the door, all approved properly, then I'd take that route. Darryl |
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