Hello Paul, Is there any Ivoprop users in the group. Any comment from
the group are welcome.

Best regards,
 ddunbar                          mailto:ddunbar@echidna.id.au

Ivo props have serious problems around the hub. The flat part of
the blade goes into a negative angle of attack at about
180 MPH giving a brick wall effect. Might work OK with a 14 inch
dia. spinner. Nobody has tried that yet to my knowledge.

Paul Lamar

-Gordon Robertson wrote:

Has anybody contacted Ivo and asked if they will redesign the prop with a
deeper bite hub?   I agree that the inner portion goes negative aoa at high
speed.  But the rest of the prop seems so well suited to the rotary engine,

that I would have thought he might be interested in a redesign.   In my mind
it should be optimized at about 220 mph, and use the blade twist to get some
extra oomph at takeoff.

Gordon Robertson

 > Why do you say it is so well suited to the rotary? In what regard?

royce

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