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Old 10-23-2009, 10:58 AM   #1 (permalink)
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Default Propeller Spacing - Radial Cowl Design

There was a lot of discussion going around when Quique first released the Yaks on the market with respect to the spacing of the rear of the propeller to the face of the cowl for a radial engine. The reason was propeller efficiency.

Does anyone know the design criteria or "rule of thumb" that governs this spacing, or a publication that descibes the necessary design factors to come up with the spacing?

Any input would be appreciated

Ted
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Old 10-23-2009, 11:10 AM   #2 (permalink)
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Default Re: Propeller Spacing - Radial Cowl Design

1.5" is good
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Old 10-23-2009, 11:34 AM   #3 (permalink)
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Default Re: Propeller Spacing - Radial Cowl Design

Quote: Originally Posted by MODE 1
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1.5" is good
Thanks, it that regardless of scale? I am looking at a design for a 40% aircraft. Wouldn't the spacing vary depending on the scale factor?

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Old 10-23-2009, 12:12 PM   #4 (permalink)
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Default Re: Propeller Spacing - Radial Cowl Design

Honestly, it really doesn't matter, as long as the prop isn't right up against the cowl.

Seth
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