Also as I recall Chuck you had cooling problem which could have been

caused

by the failure of the inner portions of the flat IVO blades to suck
the air out of the Velocity cowling. Tracy Crook also had cooling problems
with the IVO prop only this time it was on a tractor airplane. Same

problem.

No angle of attack on the inner portions of the blades. In the case of a

tractor

the inner portions of the blade go into a negative angle of attack

generating negative

thrust fighting the positive thrust from the rest of the blade.

BTW this prop design was used in the 30's by the British on a Sword Fish

biplane

and abandoned. IVO's are OK for slow low HP airplanes.

Paul Lamar

Hi Paul,

    Now if we can just get the other propeller companies to reduce their
prices by roughly 80% we will truly have some viable choices when it comes
to adjustable pitch props!  --  There's something we can all look forward
to!

Robin

PS:  How do we get them to do that?

What do they call 1000 lawyers at the bottom of the sea? :-)
I hope we don't have any lawyers on here.

Paul Lamar

                A good start.

Bill

 
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