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  #1  
Old 08-21-2014, 11:26 AM
Karbonkid Karbonkid is offline
 
Join Date: Oct 2012
Location: Ny, Fl, Co
Posts: 15
Default Aymar Demuth to Catto 3 blade

Excited for my new prop so figured I'd post

Purchased RV4 with Aymar Demuth prop, swapping to catto 3 blade

Seems everyone is always interested in performance numbers so figure I would document before and after...

numbers of interest? Static, climb @100, full at 8000 ??

I rarely ever look so imput on what is of intrest welcome.....

first attempt at photos below:

Plane / prop in a box... was a little worried with cond of box / shiny new prop
[IMG] Sent from my iPhone[/IMG]

Quote:
[IMG][/IMG]
[IMG][/IMG]

Last edited by Karbonkid : 08-21-2014 at 02:36 PM.
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  #2  
Old 08-21-2014, 11:39 AM
strahler13's Avatar
strahler13 strahler13 is offline
 
Join Date: Jan 2005
Posts: 369
Default Failed on the picture post

Something like this, only different:
https://www.youtube.com/watch?v=NN1yFR3i34M
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Mark Strahler
RV-6 (Purchased flying)
KFFC-Peachtree City, GA
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  #3  
Old 08-21-2014, 12:21 PM
Karbonkid Karbonkid is offline
 
Join Date: Oct 2012
Location: Ny, Fl, Co
Posts: 15
Default

http://flic.kr/p/oyekG9
http://flic.kr/p/oNGhZ5
http://flic.kr/p/oQGi9Y
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  #4  
Old 08-21-2014, 01:59 PM
psalter psalter is offline
 
Join Date: Dec 2006
Location: Beaumont, TX
Posts: 55
Default A/D to Catto

I recently, 1.5hrs ago, replaced my A/D 2 blade with a Catto 3 blade. I have been totally impressed. The pull on the runway is better, top end better, and when I pull the throttle to slow it down, the Catto seems to deaccelerate faster.
I am sold....

I have not been able to get real world numbers yet, maybe this weekend if the weather holds.

Phil

[IMG][/IMG]
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  #5  
Old 08-21-2014, 02:26 PM
humptybump humptybump is offline
 
Join Date: Feb 2011
Location: USA
Posts: 3,179
Default

What size A-D propeller did each of you replace ?
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  #6  
Old 08-21-2014, 02:29 PM
psalter psalter is offline
 
Join Date: Dec 2006
Location: Beaumont, TX
Posts: 55
Default A/D to Catto

68" x ??

I will have to take another look when at the airport. I have a 160hp Lyc.
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  #7  
Old 08-22-2014, 01:07 PM
precession precession is offline
 
Join Date: Apr 2006
Posts: 146
Default

Looking forward to your post of more info.
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  #8  
Old 09-10-2014, 09:53 AM
Karbonkid Karbonkid is offline
 
Join Date: Oct 2012
Location: Ny, Fl, Co
Posts: 15
Default

I am replacing a 68 x 78 A/D

I was concerned with the spacer configuration so I ended up just ordering new extension and spacers for the catto from saber. went with a 20lb crush plate as well that I will put on when my brothers want a ride.

anyways, I got everything on the plane last week. will have to do the A/D numbers later though should be easy as I have all old spacer fwd setup I can just bolt on.

I went for 2 short flights in the pattern as it was a busy week....

First impressions:
on ground
- prop looks amazing
- Surprised that the prop felt no smoother than the old A/D
- seems like more vibration under ~1200 rpm
flying
- Prop pulls hard on run up 2200 static iirc
- no noticable difference on takeoff
- on climbout the noise was much different then the A/D sounded like a 185 more like it was cracking the air (not sure how else to discribe)
- Seemed to be more vibration in the downwind than the A/D though I may have been overly sensitive with new prop.
- final / landing I couldnt really tell a difference, possibly slowed faster.

I contacted catto and googled the potential vibration and noise
- catto thought the increase in noise may have actually been hearing more engine noise bc of quiter prop. I may believe this

- I have moved the prop 1 bolt hole clockwise to see about vibration

going to try this afternoon and see how it is

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  #9  
Old 09-10-2014, 09:55 AM
flyingriki's Avatar
flyingriki flyingriki is offline
 
Join Date: Sep 2008
Location: California
Posts: 697
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I was surprised to find that one hole move solved mine completely. Hope it does for you.
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  #10  
Old 09-10-2014, 10:58 AM
Neal@F14's Avatar
Neal@F14 Neal@F14 is offline
 
Join Date: Aug 2007
Location: Wichita Falls, TX
Posts: 2,182
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Quote:
Originally Posted by psalter View Post
I recently, 1.5hrs ago, replaced my A/D 2 blade with a Catto 3 blade. I have been totally impressed. The pull on the runway is better, top end better, and when I pull the throttle to slow it down, the Catto seems to deaccelerate faster.
I am sold....

I have not been able to get real world numbers yet, maybe this weekend if the weather holds.

Phil

[IMG][/IMG]
Wow, N621RT sure looks good with that 3-blade prop on it. I bet Tim will wish he never sold it after he sees this pic.
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Airplaneless once again...

Last edited by Neal@F14 : 09-10-2014 at 04:17 PM.
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