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Old 02-04-2006, 11:59 AM   #11
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Originally Posted by Robw
For some reason I always had it in my mind that the smaller diameter prop would give better vertical and larger better speed. I guess I was wrong. I'm glad I asked . Thanks for the info guys. I really appreciate your help.
Dont sacrifice all your speed for static thrust...there is a point at which you will end up going too slow and your model will fly sloppy. You can have all the thrust in the world, if you cant maintain a proper flight speed it wont do you any good....unless all you want to do is hang on the prop and 3D it all day.

Its really a compromise and depends on your flying thing is to start getting props and trying them out...down the road you will be able to more accurately estimate what is going to work and save the experimenting.

If its all out performance you are looking for, APC is probably your best bet. They have a pretty huge selection and they are very good at designing props (they design props for the US Navy UAV program). Forget MA....some of the wood props (Zinger) are nice and light so they spin up fast which can make a difference.
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Old 02-04-2006, 04:06 PM   #12
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Thanks for the formula as well, I shall be experimenting with it.

George R

As far as I'm aware, you need to drop 1" somewhere. So either a 10-6 or a 11-5 would be about the same. I've never tested this, but I'm getting ready to soon, and I'll be using that as a reference.

Keep in mind, the more blades, the less efficent the prop is. I've heard that the hardcore pylon racers used to run a 1-bladed prop to get the most out of their screamers!

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Old 02-04-2006, 04:25 PM   #13
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This might help you

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Old 02-04-2006, 06:31 PM   #14
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Prop Questions

Thanks Guys for this info.

Georges R
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