REFLECTOR: Fixed pitch prop info

[jeff findarle]

Geoff, Presently I have a 2 blade Demuth prop (Out of Biz). Not sure of the pitch, etc... Came on plane and logs don't tell me. 
I may be interested in purchasing that Catto prop (3 blade or 2") from you, I own a 173RG with a IO360 A1A and my field altitude is 5637 ft elevation, so a shorter field prop would be ideal and if I can get 175Kts, I would be tickled pink. 
Then yo can have Craig build you a brand new one?
Call me to discuss if interested? Can you send me a pic of the Catto? Also wondering how old it is and do you use the crush washers to prevent prop bolts from loosening? What does a new Catto prop costs and did you have to send it back to Craig to re-work it when you got it?
Thx, Jeff    435-503-0514.


 
Thank you, Jeff
TEAM JEFF Real Estate


Jeff Findarle - Realtor, GRI
 PRES.-Wasatch Co Association of Realtors
Darin Heckel - Realtor                     AllStar Realty
575 N main St.
Heber City, UT. 84032

Jeff's Cell 435-503-0514435-503-0514
Darin's Cell 435-671-3957435-671-3957
Off. 435-654-9440435-654-9440
Fax               435-654-9437
Distressed Property Experts, Short Sales a Specialty!
Don't Lose it, Sell it!



On Saturday, March 8, 2014 6:12 PM, Geoff Gerhardt <geoff.gerhardt at gmail.com> wrote:
 
Folks,
>
>
>I have two props from Catto for my 173RG.  One, I had Craig build and another is one I got from a Cozy owner who had it laying around.  I have an LIO-360, and he had a left-turning prop from an auto conversion that he was no longer using, so I grabbed it.
>
>
>The newer Catto prop is a 66" dia x 74" pitch.  This was Craig's recommendation for a 173RG.  The other is a 64" dia x 76" pitch.  So, the newer one is a couple inches larger diameter, but less pitch.  I have been flying with both of them on and off, but other than some seat-of-the-pants numbers, I never really did a good comparison of them to see which actually performs better.  Today, though, I put each on and took it out for a spin following very similar flight profiles and collected the data.
>
>
>I used an app on my iPhone called CloudAhoy to collect the flight data.  Pretty neat app - I've provided links to the two flights that you can look over.
>
>
>The newer Catto prop (66x74) has a static of 2150RPM, the older one (64x76) has a static of 2300.  Bottom line is, the smaller diameter, longer pitch prop has a shorter takeoff roll (~1200' vs ~1600'), but they both have about the same cruise speed (~175ktas, LOP, 2750RPM).
>
>
>Have a look at the two flight profiles (links below).  If you're wondering about the funky pattern at the end of each flight, I did an overhead approach.
>
>
>Older prop (Catto: 66" dia x 74" pitch - static 2300RPM)
>http://www.cloudahoy.com/api/S.cgi?tZdSdTJtntdj2U
>
>
>
>Newer prop (Catto: 64" dia x 76" pitch - static 2150RPM):
>http://www.cloudahoy.com/api/S.cgi?6vLxFSMb9IQOt4HdC9A8
>
>
>
>I would actually like to send the newer prop back to Craig and have him trim it to something like a 64x77.  I can live with the longer takeoff roll if it would give me a bit more on the top end.
>
>
>Hope this info helps those trying to figure out a fixed-pitch prop to use.
>
>
>Geoff
>
>
>_______________________________________________
>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>
>Visit the gallery!  www.tvbf.org/gallery
>user:pw = tvbf:jamaicangoose
>Check new archives: www.tvbf.org/pipermail
>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20140308/cc338a95/attachment.html>