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  #1  
Old 02-03-2021, 05:37 PM
georgedouglas georgedouglas is offline
 
Join Date: Jan 2015
Location: florida/tennessee
Posts: 37
Default Catto 3 Blade Prop

I just ordered a 3 blade Catto prop to replace my Sensenich fixed pitch prop that Vans recommends with the 0 320 Lycoming 160 HP on my RV9A. I won't get delivery until June so let me hear if I am making a mistake. I operate off my grass airstrip so I ordered it with the nickel leading edge. I opted for the all around cruise/climb prop with 72" pitch.
george
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2TN7 Wolfcreek
President EAA Chapter 17
Knoxville TN
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USAF 1966-1970
1970-2001 DAL
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  #2  
Old 02-03-2021, 07:34 PM
ty1295 ty1295 is offline
 
Join Date: Aug 2011
Location: Jeffersonville, IN
Posts: 454
Default

I have the exact prop on my 9a, and have been happy so far.
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Jeff Scott
RV9A First Flight 9/30/19
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  #3  
Old 02-03-2021, 07:47 PM
georgedouglas georgedouglas is offline
 
Join Date: Jan 2015
Location: florida/tennessee
Posts: 37
Default

What prop did you have on it before changing to the Catto?
george
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RV9A
2TN7 Wolfcreek
President EAA Chapter 17
Knoxville TN
A&P & Private Pilot
USAF 1966-1970
1970-2001 DAL
www.oilhelp.com
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  #4  
Old 02-04-2021, 06:06 AM
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jselvatici jselvatici is offline
 
Join Date: Mar 2019
Location: Melbourne, FL
Posts: 171
Default

I have a 3 blade Catto 68x72 on the same type of engine and at 2150RPM gives me a cruise speed of 120kts (IAS).
Could not be happier, and very nice looking. Hope this helps.
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Juliano Selvatici
RV-9A / N349RV
1st Flight on 8/14/2020 - Phase 1 done on 11/24/2020
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  #5  
Old 02-04-2021, 07:54 AM
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uk_figs uk_figs is offline
 
Join Date: Jan 2005
Location: Tulsa, OK
Posts: 1,068
Default

My buddy has the 3 blade Catto on his 9A (340) and flies out of a grass strip, he loves the prop and his 9A climbs very well.
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  #6  
Old 02-05-2021, 01:43 PM
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rjcthree rjcthree is offline
 
Join Date: Jan 2007
Location: Bay Village, OH
Posts: 958
Default Why?

I made the change from the Sensenich fixed as recommended, I went to the sensenich ground adjustable. I did it primarily (90%) to get weight off the nose. The other 10% is look, to be honest. Performance, smoothness running in cruise are about the same. The idle (600-700 on the ground) got a little worse, just rougher, the loss of the rotating inertia at idle matters. I’m curious why you’re making the change.
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RV-9A N183RC/90432: tip-up, O320H2, Ellison, Dynon D180, CPi2, Sen GA, at KLPR
RV-8 83718, wing kit, tanks done, with a four year plus plan - on hold due to home move
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  #7  
Old 02-05-2021, 03:07 PM
georgedouglas georgedouglas is offline
 
Join Date: Jan 2015
Location: florida/tennessee
Posts: 37
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Quote:
Originally Posted by rjcthree View Post
I made the change from the Sensenich fixed as recommended, I went to the sensenich ground adjustable. I did it primarily (90%) to get weight off the nose. The other 10% is look, to be honest. Performance, smoothness running in cruise are about the same. The idle (600-700 on the ground) got a little worse, just rougher, the loss of the rotating inertia at idle matters. Iím curious why youíre making the change.
I think the 3 blade looks nicer, more ground clearance since I operate off grass, less vibration, getting rid of the 2600 RPM restriction of the Sensenich prop, and reduced weight. Also since my airstrip is down in a valley with rising terrain at one end and tall trees at the other end, I am hoping that it gives me a little more drag on final coming in at a 4 degree plus glide slope.

I hope once I make the change that I still feel this way. When all the dust settles and I get a fair price for the Sensenich prop, the swap shouldn't be all that expensive. I only have 90 hours on the prop so it's in excellent shape.
george
__________________
RV9A
2TN7 Wolfcreek
President EAA Chapter 17
Knoxville TN
A&P & Private Pilot
USAF 1966-1970
1970-2001 DAL
www.oilhelp.com
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  #8  
Old 02-05-2021, 03:24 PM
DavidHarris DavidHarris is offline
 
Join Date: May 2018
Location: Upland, CA
Posts: 128
Default

My Catto 3 blade on my Rv7a io360 works and looks great. It is much lighter than other props and I had to add 20 pounds on the crush plate to be able to carry reasonable baggage. Make sure your W&b is ok.
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Vans RV-7A N47HM
First Flight March 2020
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  #9  
Old 02-05-2021, 04:12 PM
georgedouglas georgedouglas is offline
 
Join Date: Jan 2015
Location: florida/tennessee
Posts: 37
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Quote:
Originally Posted by DavidHarris View Post
My Catto 3 blade on my Rv7a io360 works and looks great. It is much lighter than other props and I had to add 20 pounds on the crush plate to be able to carry reasonable baggage. Make sure your W&b is ok.
I am hosting a weight & Balance workshop on my RV9A tomorrow morning for our EAA chapter 17 here in Knoxville TN area. I didn't build this aircraft and I have made many changes this last year that a W&B is way over due. Yes when I do install the prop I will have to recalculate it and hopefully don't have to add as much ballast as you did.
george
__________________
RV9A
2TN7 Wolfcreek
President EAA Chapter 17
Knoxville TN
A&P & Private Pilot
USAF 1966-1970
1970-2001 DAL
www.oilhelp.com
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  #10  
Old 02-06-2021, 08:14 AM
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uk_figs uk_figs is offline
 
Join Date: Jan 2005
Location: Tulsa, OK
Posts: 1,068
Default

Quote:
Originally Posted by georgedouglas View Post
I am hosting a weight & Balance workshop on my RV9A tomorrow morning for our EAA chapter 17 here in Knoxville TN area. I didn't build this aircraft and I have made many changes this last year that a W&B is way over due. Yes when I do install the prop I will have to recalculate it and hopefully don't have to add as much ballast as you did.
george
When I swapped the sensenich for the catto on my -7 the W&B was a big deal because the sensenich+hub weighed 42 lbs and the Catto only weighed 14 lbs. 28 lbs off the nose had to be compensated for, may not be as big an issue with the A models.
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