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Wooden Propellers
On Mar 2, 12:22 pm, "george" wrote:
On Mar 2, 6:02 pm, "Crash Lander" wrote: "Morgans" wrote in message ... "Crash Lander" wrote The Skyfox Gazelle I fly has a wooden prop. It has just been re-furbished. It truly is an awesome piece of work. One downside however is that the a/c cannot/should not be flown in even light rain, as the raindrops pit the prop. I take that it does not have any metal or resin leading edge inserts to protect it? -- Jim in NC It does have resin leading edge inserts, but they take a beating just from dry weather flying. I was always paying close attention to them during my pre-flight inspection, because I was noticing the damage slowly getting worse from week to week. It may be a case of once the damage starts, it's all down hill for the inserts. I'm not sure. Perhaps the new ones will be more durable. The a/c has no screen wipers anyway. Also, being basically a kit plane, I can't imagine it's all that water tight! ;-) Oz Lander We used to have brass/copper strips on the leading edge of the propellers. Easily replaced- Hide quoted text - Moisture gets under the brass and the wood rots behind it. The edges of the brass mess up the airflow and reduce the prop's efficiency. My wooden prop has a leading edge cast into it that's made of "hard urethane," as the builder told me, and I suspect it's one of Devcon's many urethane products, perhaps the ceramic-filled one that's often used for repairing dinged-up machine tool ways or conveyor chain slideways. Really abrasion-resistant, and after ten years it looks like new. When I someday get around to building a prop that's what I'll edge it with. Here's a couple of their products, but in epoxies: http://www.devcon.com/devconfamilypr...d=111&catid=15 http://www.devcon.com/devconfamilypr...d=100&catid=19 I can't find the old abrasive-resistant hard urethanes I used to use. Maybe they dropped them. Dan |
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