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Prop for Tee Dee .09's? Cox_ba12




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Prop for Tee Dee .09's?

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Prop for Tee Dee .09's? Empty Prop for Tee Dee .09's?

Post  AT1984 Sun Aug 21, 2011 12:07 am

I have two grey Cox 7X3.5 props, that I have been told work good for the .09.

Will a 7X4 prop work?

Thanks!

Allen
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Post  Admin Sun Aug 21, 2011 1:18 am

Sure it would work!

Prop for Tee Dee .09's? Td_pro10


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Post  gcb Sun Aug 21, 2011 10:31 am

AT1984 wrote:I have two grey Cox 7X3.5 props, that I have been told work good for the .09.

Will a 7X4 prop work?

Thanks!

Allen

YES. Anything close to that size range should work fine.

George
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Post  SuperDave Sun Aug 21, 2011 10:36 am

Whether the prop "works" depends on the airplane that it is used on: weight, drag, etc.

Think of props as gears on a bicycle. All gears "work" but some gears are better than others depending on the situation.

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Post  gcb Sun Aug 21, 2011 11:09 am

What you say is true. I generally determine what size prop (approximately) will fly a plane, then install an engine that will swing that prop range.

The Tee Dee .09 is very comfortable swinging a 7x4 prop. Whether a 7x4 will pull a particular plane is a different question, IMHO.

George
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Post  AT1984 Sun Aug 21, 2011 11:22 am

Guys,

Thanks! I appreciate it.

Allen
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Post  Tee Bee Thu Aug 25, 2011 10:33 am

Well put, George. I usually end up using the black Cox 7x3.5 for overall good performance. They are very hard to find these days, though. I was able to scrounge up a handful of them on the bay over several years of looking. They should last me a long time since I don't run .09s as often as other sizes. In a pinch, the readily available Master Airscrew 7x3 or 7x4 should get her flying.
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