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gcrowder2
Joined: 09 Jan 2006
Posts: 136
Location: Golden, Colorado USA
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 Posted: Sat Mar 21, 2009 11:09 am Post subject: Catto ground adjustable prop for LSA market |
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One of the Zenair pilots at my field has been in contact with Craig Catto at Cattoprops.com. Craig confirms he is
testing a ground adjustable prop for the LSA market (think Rotax) and is testing it against the Kiev prop. He says
it is significantly better than the Kiev so this is great news. Catto makes racing props so knows a thing or two
about prop twist. I have 45 deg twist on my fixed pitch 64x62 three blade Catto. Craig is very hard to get ahold
of and is usually easier to get on the phone rather than emails.
Glenn
| Quote: | From: fklein(at)orcasonline.com
To: europa-list(at)matronics.com
Subject: Re: Constant Speed Props C etc.
Date: Fri C 20 Mar 2009 18:12:56 -0700
--> Europa-List message posted by: Fred Klein <fklein(at)orcasonline.com>
On Mar 20 C 2009 C at 2:00 PM C Paul McAllister wrote:
> I am not an aerodynamicst C not even an amature one but I was
> wondering why you didn't think the Kiev blades will be much of an
> improvement over the Warp Drive blades.
Bud C
I too was surprised at your apparent skepticism as to whether those
Kiev blades may offer improvement over the current WD blades in the
Airmaster hub.
I had several long emails w/ Martin on the subject...perhaps 2 years
ago...and my recollection is that he was quite candid about the WD
blades being less than optimal given the flight envelope and length
limitations of the blades for the Europa. My understanding is that
the WD blade stock is much longer C and when cut down to length
required C they lose much of their twist...to such an extent I've read
that the inner portions of the blades create negative thrust under
certain conditions. I've speculated that the relative lack of twist
may be a factor in engine cooling...just speculation C I have C of
course C no direct experience.
Assuming that the "432" references a new hub C I hope it's available
with other than a ======================
>======
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budyerly(at)msn.com
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| Posted: Sat Mar 21, 2009 6:06 pm Post subject: Catto ground adjustable prop for LSA market |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Glenn,
My experience with Catto is from one O-200 Europa and a couple of RV's. Phil Catto makes beautiful props. His fixed pitch props are better than some constant speed props. He gets it right.
Bud
[quote] ---
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