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  #1  
Old 06-08-2006, 10:39 AM
Flyer Tuck Flyer Tuck is offline
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Location: Dublin, Ca.
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Default Effects of Spinners on Pushers -- Quantification

Hi all. New Canardian and asking the stupid questons.

Where is there performance information regarding the effectiveness of spinners on pusher aircraft?

I have seen information for tractors, but nothing for pushers.

Rick
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  #2  
Old 06-08-2006, 12:02 PM
Lynn Erickson Lynn Erickson is offline
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Quote:
Originally Posted by Flyer Tuck
Hi all. New Canardian and asking the stupid questons.

Where is there performance information regarding the effectiveness of spinners on pusher aircraft?

I have seen information for tractors, but nothing for pushers.

Rick
Thats because there is none. none that I can measure. After a lot of flight testing in the 200 Knot range the numbers are so close it is hard to put a number on it. and the more I tested and wanted to believe the spinner made it faster the less the numbers supported it. many of the pilots that have raced their canards have said they think it might help but can't give a number over 1 knot and I don't know how they can even measure that. The fastest race speed I have had was without the spinner. The vortex generated by the prop is behind you and the spinner may help to smooth out that air flow but it can't have an effect on the airframe as it does in a tractor type.
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Much better with a Dremel than a computer.
What if they gave me choice between a fast computer or a fast plane?
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  #3  
Old 06-08-2006, 02:16 PM
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bferrell bferrell is offline
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Yea, but the Hersey Kiss style are so cool looking....
http://www.cattoprops.com/html/velocity_xl_props.html

Brett
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Old 06-08-2006, 06:10 PM
rutanfan rutanfan is offline
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Quote:
Originally Posted by Lynn Erickson
many of the pilots that have raced their canards have said they think it might help but can't give a number over 1 knot and I don't know how they can even measure that.
http://www.lightspeedengineering.com...es/Spinner.htm

Klaus suggests a 1% increase which is on par with what you’ve seen.
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