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Adjustable pitch props?

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Old 11-05-2009, 02:08 PM
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JohnVH
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Default Adjustable pitch props?

Has anyone designed one? In flight constant speed even? I wish warbirdpropdrives didnt fall away.....

Thinking for 50-100cc range, just the hub design/mechanics and somebody that makes blades that will work. Just thinking out loud...
Old 11-06-2009, 01:30 PM
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jester_s1
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Default RE: Adjustable pitch props?

I would think such a device would be a nightmare to design given the size and weight limits on our models.
Old 11-06-2009, 01:32 PM
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JohnVH
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Default RE: Adjustable pitch props?

No, its been done, but cant get one, or any info on how to build my own...

www.warbirdpropdrives.com
Old 11-06-2009, 03:43 PM
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stang
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Default RE: Adjustable pitch props?

Check this out, t might be what you want.
http://www.warbirdpropdrives.com/30601.html
Old 11-06-2009, 03:45 PM
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JohnVH
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Default RE: Adjustable pitch props?

Yes, thats what I want, they arent selling them, and have not done anything with it in a while. Someone out there has to know what and how to build one or obtain one.
Old 11-06-2009, 06:11 PM
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dreadnaut
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Default RE: Adjustable pitch props?

In the case of racing, the saying "just because it can be done, doesn't mean it should be done" holds true. It adds weight and complexity to an airplane that has a fairly narrow operating speed range (flat out). The props they use are very inefficient during acceleration and climb out, but that is such a short duration event, that it probably isn't worth the couple hundredth seconds it will gain you. In aerobatics where the operating environment is more variable, it could be an advantage, but with all that a pattern or IMAC pilot has to contend with, adding one more flight control would increase the pilot workload at the expense of performance. If you want to have one 'cause its cool, go for it.
Old 11-06-2009, 06:54 PM
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JohnVH
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Default RE: Adjustable pitch props?

Umm ok, I want it cause I want it. Complexity, not an issue with models to me. Weight, its a warbird, itll need nose weight. Im not racing it, Im not imacing it, Im not hovering it, Im not 3ding it. I want to swing a big prop with a little motor, and make it work.

Expense of performance? Its going onto a warbird, almost anything will work.

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