Joe;

 

There have been a number of Velocitys flying with IVO, and the consensus I have heard is pretty much the same as with other aircraft.  Very good takeoff roll, climbs great, limited top end.  The higher pitch versions are better, but the fundamental issue remains; twisting of the blade with a fixed root results in optimum pitch distribution along the Blade at only one setting. If you are looking at power less than 200hp on the Velocity it may be just fine.

 

Chuck Harbert had one on his Velocity with 20B and thought it was great, but he never really got into a flight test program before abandoning the engine after a couple of fires.  He has offered it to me to compare to my Catto once I get flying.  I’ll decide later whether to try it or not.

 

My first looks at the prop years ago left me with questions about the quality, but that is just a judgment factor that I have no experience to back up, and things have likely improved since. Looking at the blades it seemed to me that some improvement in performance could be obtained by some reshaping of the leading edge.  Dave Atkins came to the same conclusion, did some reshaping and verified better performance in flight tests.

 

Al

 

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Joe
Sent: Saturday, January 15, 2005 7:57 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] IVO Prop