Europa-List: Re: Airmaster whirlwind blades

[h&amp;jeuropa <butcher43@att.net>]

David,

We attempted to measure this yesterday.  It is difficult to measure the 
incidence
of the blade at the 1/3 radius point since the blade is not flat there.  But
making the level equidistant from the leading edge and the trailing edge at
the point, the twist in the blade is around 14 deg. 

The blade has quite an airfoil shape so perhaps that accounts for the improved
performance rather than twist.

Jim & Heather


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http://forums.matronics.com/viewtopic.php?p=469292#469292