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  #1  
Old 07-19-2018, 08:19 AM
titanhank's Avatar
titanhank titanhank is offline
 
Join Date: Aug 2007
Location: Friendswood, Tx
Posts: 195
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will relist prop in 2 months. Whirlwind just called with 8-10 week lead time on the new one. Sorry
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Rv-6
0-320/160hp
Dual pmags
Catto 3-blade gen 3
Smoke system
Glass panel

Last edited by titanhank : 07-19-2018 at 11:50 AM.
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  #2  
Old 07-19-2018, 09:45 AM
Rick RV-4 Rick RV-4 is offline
 
Join Date: Aug 2006
Posts: 218
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Just curious, what kind of climb rate do you get through the first 3,000-4,000 feet?

Thanks
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  #3  
Old 07-19-2018, 09:51 AM
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titanhank titanhank is offline
 
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Location: Friendswood, Tx
Posts: 195
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Depends on weight and temp. My rv6 is 1060 lbs and i fly in the south Texas heat. I have seen 1500 fpm solo in the cooler months down to 1000ft fpm with a pax in the summer mid day while climbing to 8000-10000ft. I normally climb on the tach and let the climb rate settle wherever it wants. I climb at 2450-2500 rpms.
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Rv-6
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Dual pmags
Catto 3-blade gen 3
Smoke system
Glass panel
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  #4  
Old 07-19-2018, 12:24 PM
Mark33 Mark33 is offline
 
Join Date: May 2010
Location: Baton Rouge, La.
Posts: 277
Default Catto VS. C/S

Hank,

I have basically the same prop but it's going on the -7 that I'm building with a 360. Have you been happy with that prop? In your original post I think you said that you're also going with a bigger engine...I'm assuming a 360, along with a C/S, so I know it's a little bit like comparing apples to oranges, but how much better performance are you anticipating? Do you think you'll net very much in a performance gain strictly due to a C/S VS. if you were to just go back to that same three blade Catto on your new engine? I know that there's lots of reasons to go with a C/S, such as better climb out performance and better gas mileage just to name a couple, but I guess my question is really more in reference to cruse/speed performance. I'm just keeping mine simple but I'm still hoping that I get great performance out of it.

Mark
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  #5  
Old 07-19-2018, 12:56 PM
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titanhank titanhank is offline
 
Join Date: Aug 2007
Location: Friendswood, Tx
Posts: 195
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I am actually going to an identical 0 smoh 0-320 with 10-1 comp and dual pmags. Should be 178 hp and 25 lbs lighter than the 0-360. I have a conical mount, so it limits my options for a 360. The c/s prop is for the formation flying. The catto is a fantastic prop, but it does not like to slow down.. i expect an improved climb and marginal speed. The extra climb is useful in the south texas heat when climbing at gross weight. We have very few days where the temp is below 95f amd 80% humidity. The catto pulls just like the c/s prop once you get the rpms up to 2500 rpm in th climb. I am looking for a performance increase from dead stop to 1000ft at gross weight at 95degs F.
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Rv-6
0-320/160hp
Dual pmags
Catto 3-blade gen 3
Smoke system
Glass panel
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  #6  
Old 07-19-2018, 02:38 PM
Mark33 Mark33 is offline
 
Join Date: May 2010
Location: Baton Rouge, La.
Posts: 277
Default Meeting up sometimes

Thanks for the feedback Hank. I'm not very far from you...I live in Baton Rouge, but I have a hangar down south of San Antonio in Live Oak County (8T6) where I'm building my -7. I'm currently flying a -4 but hopefully I'll get my -7 flying within a year. Itíd be great to meet up sometimes.

Mark
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  #7  
Old 07-19-2018, 08:44 PM
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titanhank titanhank is offline
 
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Posts: 195
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I am at wolfe airpark (k3t2) on the southwest corner of houston. Let me know the next time you are passing through town.
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Rv-6
0-320/160hp
Dual pmags
Catto 3-blade gen 3
Smoke system
Glass panel
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  #8  
Old 07-19-2018, 10:35 PM
Mark33 Mark33 is offline
 
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Location: Baton Rouge, La.
Posts: 277
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Wilco. Iíll send you a PM with my contact information.
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  #9  
Old 07-20-2018, 04:34 AM
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Lufthans Lufthans is offline
 
Join Date: Dec 2017
Location: Hilversum, The Netherlands
Posts: 26
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Quote:
Originally Posted by Rick RV-4 View Post
Just curious, what kind of climb rate do you get through the first 3,000-4,000 feet?

Thanks
We've got the same prop on our 160hp O-320 and love it.

Initial climb rate (solo) is around 2000 fpm (on 1000 lbs plane with 225 lbs pilot and half fuel). Top speed is hitting the 212 mph Vne. Highly recommended.

Like Hank says - the only letdown is that the plane just won't slow down. To me that would be the only reason to consider a C/S.

FWIW
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Hilversum, The Netherlands

PH-SUM RV-4; Imported and upgraded.
PH-BRR Bowers Fly Baby; Imported and upgraded
PH-MGA Jodel DR1050; Built, with Subaru EJ25
PH-EIL RV4; Imported and upgraded for friend. Sadly crashed
PH-ERD Robin DR300; Built with Subaru EZ30 for friend.

Last edited by Lufthans : 07-20-2018 at 04:37 AM.
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  #10  
Old 07-20-2018, 08:51 AM
Mark33 Mark33 is offline
 
Join Date: May 2010
Location: Baton Rouge, La.
Posts: 277
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I'm really hoping to get some good numbers out of the IO-360 powered -7 that I'm building using this three blade Catto prop. I also have a three blade Catto on my -4 so I'm at least accustom to dealing with managing my speeds when I need to. I've never actually had any problem slowing it down. All I do is pull the throttle and pitch up as needed and she slows right down. I'm sure I'll loose a little bit of climb out performance when compared to a C/S but where I fly out of that's really not an issue. I'll be more than happy if she'll cruse in that 200mph TAS range leaned back to 8GPH. I won't complain at all about having to finesse my speeds in the pattern. So, I guess for me, if my overall cruse performance is "about" the same as what I might get with a C/S, then I'll gladly take the simplicity that a F/P prop offers and just manage my decent and pattern speeds with throttle and pitch.

Mark
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