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O-360 and Catto FP prop

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Scot

Joined: 20 Jul 2009
Posts: 8

Posted: Thu Jun 13, 2013 5:34 pm Post subject: O-360 and Catto FP prop

Hi folks,  



 

I am seeking information from those who have  installed an O-360 with a Catto three bladed prop on their RV-7. I am getting  ready to order my finishing kit and have one final decision to make before the  order. My concern lies in a potential aft CG issue when installing an O-360 and  a Catto FP prop. As I understand it my options are one of two installations. 



 

Option 1 is to install a weight of X lbs behind  the prop to shift the CG forward. Of course, this reduces useful payload by X  lbs may be the least expensive. 



 

Option 2 is to use a engine mount for a O-320  shifting the engine forward with the ensuing CG shift. This option requires an  extended cowling (the Vans version might work, I believe I can order an extended  Sam James cowl. Not sure about the Sam James cowl working.) This is the more  expensive solution. 



 

If you have an RV-7 configured with an O-360 and a  FB prop; would you mind sharing your CG issues if any? I appreciate any  information you can give.  



 

As a final note, I have considered CS and have  read extensively on the performance issues. I have decided on FP. 



 

Thanks for your time. 



 

Scott

   [quote][b]

Matt Dralle
Site Admin

Joined: 08 Nov 2005
Posts: 26320
Location: Livermore CA USA

Posted: Thu Jun 13, 2013 6:00 pm Post subject: O-360 and Catto FP prop

At 06:33 PM 6/13/2013 Thursday, you wrote:

 	  Quote: 	
		    

Hi folks, 



As a final note, I have considered CS and have read extensively on the performance issues. I have decided on FP.



Thanks for your time.



Scott


	




Hi Scott,



Reconsider the CS prop.  My RV-6 with an O-360 and a Hartzell prop is the perfect combination of climb and cruse performance.  I love being able dial the prop back to 2350 for cruse.  In the RV-8 with the same prop and the IO-390, I don't have the RPM restriction and routinely dial it back to 2150 with lots of MP for a REALLY quiet, high-speed cruse.  Oh, and the climb is outrageous.



I wouldn't own an RV without a CS prop!

-

Matt Dralle



RV-8 #82880 N998RV "Ruby Vixen"

http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log

http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log

http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel

Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...



RV-6 #20916 N360EM "The Flyer"

http://www.mattsrv6.com - Matt's RV-6 Revitalization Log

Status: 150+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode

_________________
Matt Dralle
Matronics Email List Administrator

carl.froehlich(at)verizon
Guest

Posted: Fri Jun 14, 2013 3:50 am Post subject: O-360 and Catto FP prop

I fully agree with Matt.  I started with a Sensenich FP on the RV-8A to save

a few dollars.  After 350 hours of I upgraded to a Hartzell blended airfoil

CS prop (the one Van's sells).  The performance gain is across the board -

not just climb.  



Bottom line, any extra money should go to this prop before another box in

the panel, the graphic paint job or that fancy leather interior.



Carl

RV-8A (sold last week)

RV-10 (95 hrs) 



--

ralphmariafinch(at)gmail.
Guest

Posted: Fri Jun 14, 2013 5:30 am Post subject: O-360 and Catto FP prop

I see the same enthusiasm on VAF for those comparing a Catto prop to standard Fixed Pitch props. Catto props apparently are in their own class.

Back to the OP's question, I'd suggest asking on VAF or calling Vans.

  

Ralph Finch



RV-9A, firewall forward

On Fri, Jun 14, 2013 at 4:50 AM, Carl Froehlich <carl.froehlich(at)verizon.net (carl.froehlich(at)verizon.net)> wrote:

  [quote] I fully agree with Matt.  I started with a Sensenich FP on the RV-8A to save

 a few dollars.  After 350 hours of I upgraded to a Hartzell blended airfoil

 CS prop (the one Van's sells).  The performance gain is across the board -

 not just climb.

[b]

vshimsl(at)live.com
Guest

Posted: Fri Jun 14, 2013 6:50 am Post subject: O-360 and Catto FP prop

No aft cg issues with Catto 3 blade on rv8. Understand there are with CS.

Do not assume prop bolts from Van's will work. Also, I ordered a special hub extension from Saber. Check archives. 

Limited funds, the KISS principal, and my personal preferences favored the fixed. I have not missed the CS prop.



Vince H

RV8 flying



On Jun 13, 2013, at 6:33 PM, "Scott" <1975jsa(at)gmail.com (1975jsa(at)gmail.com)> wrote:

[quote]         

Hi folks,  



 

I am seeking information from those who have  installed an O-360 with a Catto three bladed prop on their RV-7. I am getting  ready to order my finishing kit and have one final decision to make before the  order. My concern lies in a potential aft CG issue when installing an O-360 and  a Catto FP prop. As I understand it my options are one of two installations. 



 

Option 1 is to install a weight of X lbs behind  the prop to shift the CG forward. Of course, this reduces useful payload by X  lbs may be the least expensive. 



 

Option 2 is to use a engine mount for a O-320  shifting the engine forward with the ensuing CG shift. This option requires an  extended cowling (the Vans version might work, I believe I can order an extended  Sam James cowl. Not sure about the Sam James cowl working.) This is the more  expensive solution. 



 

If you have an RV-7 configured with an O-360 and a  FB prop; would you mind sharing your CG issues if any? I appreciate any  information you can give.  



 

As a final note, I have considered CS and have  read extensively on the performance issues. I have decided on FP. 



 

Thanks for your time. 



 

Scott

    	  Quote: 	
		  

	


[b]

n146wb(at)cfu.net
Guest

Posted: Fri Jun 14, 2013 7:58 am Post subject: O-360 and Catto FP prop

My RV-6 performs quite nicely with an O-320 and a Sensenich FP prop.  It handles loops, rolls, barrel rolls, and hammerheads quite nicely.  I chose FP for cost and maintenance reasons.  Getting the max performance was not a concern for me.

Warren

On Jun 14, 2013, at 9:49 AM, Vince Himsl <vshimsl(at)live.com> wrote:

[quote] No aft cg issues with Catto 3 blade on rv8. Understand there are with CS.

 Do not assume prop bolts from Van's will work. Also, I ordered a special hub extension from Saber. Check archives. 

 Limited funds, the KISS principal, and my personal preferences favored the fixed. I have not missed the CS prop.

 Vince H

 RV8 flying

 On Jun 13, 2013, at 6:33 PM, "Scott" <1975jsa(at)gmail.com> wrote:

>  

> Hi folks,

> 

> I am seeking information from those who have installed an O-360 with a Catto three bladed prop on their RV-7. I am getting ready to order my finishing kit and have one final decision to make before the order. My concern lies in a potential aft CG issue when installing an O-360 and a Catto FP prop. As I understand it my options are one of two installations.

> 

> Option 1 is to install a weight of X lbs behind the prop to shift the CG forward. Of course, this reduces useful payload by X lbs may be the least expensive.

> 

> Option 2 is to use a engine mount for a O-320 shifting the engine forward with the ensuing CG shift. This option requires an extended cowling (the Vans version might work, I believe I can order an extended Sam James cowl. Not sure about the Sam James cowl working.) This is the more expensive solution

rv8builder

Joined: 02 Jan 2009
Posts: 56

Posted: Fri Jun 14, 2013 12:44 pm Post subject: O-360 and Catto FP prop

I too have a RV-8 fitted with a IO-360 with a Catto prop.  I knew up front that I would loose T.O. and climb performance and I did it just for $$$.  



CG has not been an issue with a firewall mounted PC-680 battery.

 

If I were to install a CS prop, I would have to move the battery aft, I suspect to account for the heavier prop.

One thing that I have noticed is that due to the low mass of the prop, when the engine is hot and at idle, it does run a bit rough and I do aggressively lean after landing.

 



Dale



N613DJ



109 hours now.





On Thu, Jun 13, 2013 at 9:33 PM, Scott <1975jsa(at)gmail.com (1975jsa(at)gmail.com)> wrote:

 [quote]         

Hi folks,  



 

I am seeking information from those who have  installed an O-360 with a Catto three bladed prop on their RV-7. I am getting  ready to order my finishing kit and have one final decision to make before the  order. My concern lies in a potential aft CG issue when installing an O-360 and  a Catto FP prop. As I understand it my options are one of two installations. 



 

Option 1 is to install a weight of X lbs behind  the prop to shift the CG forward. Of course, this reduces useful payload by X  lbs may be the least expensive. 



 

Option 2 is to use a engine mount for a O-320  shifting the engine forward with the ensuing CG shift. This option requires an  extended cowling (the Vans version might work, I believe I can order an extended  Sam James cowl. Not sure about the Sam James cowl working.) This is the more  expensive solution. 



 

If you have an RV-7 configured with an O-360 and a  FB prop; would you mind sharing your CG issues if any? I appreciate any  information you can give.  



 

As a final note, I have considered CS and have  read extensively on the performance issues. I have decided on FP. 



 

Thanks for your time. 



 

Scott

    	  Quote: 	
		  



t="_blank">http://www.matronics.com/Navigator?RV-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	


[b]

_________________
Dale

Dave Burnham

Joined: 04 Jul 2011
Posts: 6
Location: Huntsville, AL

Posted: Fri Jun 14, 2013 1:15 pm Post subject: O-360 and Catto FP prop

Check out Whirlwind, CS no CG issues.

Dave B

On Jun 14, 2013, at 3:43 PM, Dale Ellis <rv8builder.kd0m(at)gmail.com> wrote:

[quote] I too have a RV-8 fitted with a IO-360 with a Catto prop.  I knew up front that I would loose T.O. and climb performance and I did it just for $$$.  

 CG has not been an issue with a firewall mounted PC-680 battery.

 If I were to install a CS prop, I would have to move the battery aft, I suspect to account for the heavier prop.

 One thing that I have noticed is that due to the low mass of the prop, when the engine is hot and at idle, it does run a bit rough and I do aggressively lean after landing.

 Dale

 N613DJ

 109 hours now.

 On Thu, Jun 13, 2013 at 9:33 PM, Scott <1975jsa(at)gmail.com> wrote:

>  

> Hi folks,

> 

> I am seeking information from those who have installed an O-360 with a Catto three bladed prop on their RV-7. I am getting ready to order my finishing kit and have one final decision to make before the order. My concern lies in a potential aft CG issue when installing an O-360 and  a Catto FP prop. As I understand it my options are one of two installations.

> 

> Option 1 is to install a weight of X lbs behind the prop to shift the CG forward. Of course, this reduces useful payload by X lbs may be the least expensive.

> 

> Option 2 is to use a engine mount for a O-320 shifting the engine forward with the ensuing CG shift. This option requires an extended cowling (the Vans version might work, I believe I can order an extended Sam James cowl. Not sure about the Sam James cowl working.) This is the more expensive solution

_________________
DJB - RV64FN

jfogarty(at)tds.net
Guest

Posted: Fri Jun 14, 2013 1:57 pm Post subject: O-360 and Catto FP prop

Great information Dale, thanks.  I have the three blade Catto going on an 0-320, RV9A.  I also liked the price.  

Jim



On Fri, Jun 14, 2013 at 3:43 PM, Dale Ellis <rv8builder.kd0m(at)gmail.com (rv8builder.kd0m(at)gmail.com)> wrote:

  	  Quote: 	
		  I too have a RV-8 fitted with a IO-360 with a Catto prop.  I knew up front that I would loose T.O. and climb performance and I did it just for $$$.  

 

CG has not been an issue with a firewall mounted PC-680 battery.

 

If I were to install a CS prop, I would have to move the battery aft, I suspect to account for the heavier prop.

One thing that I have noticed is that due to the low mass of the prop, when the engine is hot and at idle, it does run a bit rough and I do aggressively lean after landing.

  



Dale



N613DJ



109 hours now.





On Thu, Jun 13, 2013 at 9:33 PM, Scott <1975jsa(at)gmail.com (1975jsa(at)gmail.com)> wrote:

   	  Quote: 	
		           

Hi folks,  



 

I am seeking information from those who have  installed an O-360 with a Catto three bladed prop on their RV-7. I am getting  ready to order my finishing kit and have one final decision to make before the  order. My concern lies in a potential aft CG issue when installing an O-360 and  a Catto FP prop. As I understand it my options are one of two installations. 



 

Option 1 is to install a weight of X lbs behind  the prop to shift the CG forward. Of course, this reduces useful payload by X  lbs may be the least expensive. 



 

Option 2 is to use a engine mount for a O-320  shifting the engine forward with the ensuing CG shift. This option requires an  extended cowling (the Vans version might work, I believe I can order an extended  Sam James cowl. Not sure about the Sam James cowl working.) This is the more  expensive solution. 



 

If you have an RV-7 configured with an O-360 and a  FB prop; would you mind sharing your CG issues if any? I appreciate any  information you can give.  



 

As a final note, I have considered CS and have  read extensively on the performance issues. I have decided on FP. 



 

Thanks for your time. 



 

Scott

    	  Quote: 	
		  



t="_blank">http://www.matronics.com/Navigator?RV-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	






t="_blank">http://www.matronics.com/Navigator?RV-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	
	


-- 

Jim Fogarty

Lakes and Leisure Realty, Inc.

8636 Bluebird Lane

Breezy Point, MN 56472

218-380-3784

 

  [quote][b]

HCRV6(at)comcast.net
Guest

Posted: Fri Jun 14, 2013 3:18 pm Post subject: O-360 and Catto FP prop

I installed a Catto two blade FP prop on my RV-6 with O-360 in 2004 and now, 1080 hours later, I have never been sorry.  Yes, you may have to be cautious about baggage compartment weight with low fuel and heavy pilot and passenger, but the trade off is a 50 plus pound weight saving and no recurring prop inspections (not to mention about $10 aviation units in your  pocket for fuel)   I fly with RV-6s and RV-7s with constant speed props frequently and easily equal their performance except in initial acceleration and climb.  If getting pushed back in your seat on takeoff and 2000 fpm climb rates ring your bell, then by all means go with a CS, otherwise you will be very satisfied with a Catto prop.  



Harry Crosby

RV-6 N16CX, 1080 hours

From: "Scott" <1975jsa(at)gmail.com>

To: rv-list(at)matronics.com

Sent: Thursday, June 13, 2013 6:33:20 PM

Subject: O-360 and Catto FP prop



         

Hi folks,  



 

I am seeking information from those who have  installed an O-360 with a Catto three bladed prop on their RV-7. I am getting  ready to order my finishing kit and have one final decision to make before the  order. My concern lies in a potential aft CG issue when installing an O-360 and  a Catto FP prop. As I understand it my options are one of two installations. 



 

Option 1 is to install a weight of X lbs behind  the prop to shift the CG forward. Of course, this reduces useful payload by X  lbs may be the least expensive. 



 

Option 2 is to use a engine mount for a O-320  shifting the engine forward with the ensuing CG shift. This option requires an  extended cowling (the Vans version might work, I believe I can order an extended  Sam James cowl. Not sure about the Sam James cowl working.) This is the more  expensive solution. 



 

If you have an RV-7 configured with an O-360 and a  FB prop; would you mind sharing your CG issues if any? I appreciate any  information you can give.  



 

As a final note, I have considered CS and have  read extensively on the performance issues. I have decided on FP. 



 

Thanks for your time. 



 

Scott

   [quote]



t="_blank">http://www.matronics.com/Navigator?RV-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



[b]

Scot

Joined: 20 Jul 2009
Posts: 8

Posted: Sat Jun 15, 2013 9:01 pm Post subject: Re: O-360 and Catto FP prop

Thank you all for the info you shared. Back to building and ordering the finish kit.

fly4grins(at)gmail.com
Guest

Posted: Sun Jun 16, 2013 6:43 am Post subject: O-360 and Catto FP prop

I myself am a CS kind of guy, but I've a friend with an IO-360 angle valve in an installation that calls for FP.  He has run a Sensenich, American, Prince, and finally a Cato three blade.  The performance increase with the Cato was spectacular.  Were FP my bag, that is surely how I would go. 



FYI



  [quote][b]

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