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Home✈️Aircraft🚁HelicopterAerial Photography and Video › SAB 710mm wide-chord blades
08-05-2007 03:18 PM  13 years ago
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Wenlock

rrApprentice

Shropshire, England

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SAB 710mm wide-chord blades
Has anyone tried these babies for AP work? The chord is 65mm compared to 62mm on the standard SAB 710s. I don't know whether that extra 3mm will make much difference.

Also SAB market them as 3D blades, I'm not sure whether this is a Bad Thing for AP work where all we want are stability and lift.
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08-05-2007 04:39 PM  13 years ago
eyeinsky

rrVeteran

Fall River, Nova Scotia, Canada

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Not sure what they will do but I do know that if you look at the current aircraft design the glider A/C has low aspect ratio wing design. This gives a low drag, high lift quality. This is for most part a long wing with low percentage of camber and cord to wing length ratio(long, skinny, thin wing).There for I would have to draw the concussion the thin blades would be more efficient at given rpm and length. On the other and the wider blades would give more lift and create more drag for the same rpm. The lift drag ratio would be better on the thin blades.

This is conclusion is base my current knowledge
Hard job competing with gravity.
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