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03-02-2013, 07:31 PM
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Join Date: Aug 2006
Location: Battle Ground, WA
Posts: 426
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Catto 2-blade prop torque
Couldn't find anything with a search. I loosened the bolts for a re-torque. My recollection is 38 - 40 ft.-lbs. Can someone please confirm. I know it's on the back of the hub - I'm trying to avoid taking it off
Thanks,
LarryT
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03-02-2013, 07:40 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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My Catto two blade is 40 ft lbs, 7/16" Bolts. My three blade is the same.
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
Last edited by LifeofReiley : 03-02-2013 at 09:44 PM.
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03-02-2013, 08:45 PM
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Join Date: Dec 2006
Location: Kalifornia
Posts: 466
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Depends on the bolt size.....
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03-02-2013, 08:52 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Quote:
Originally Posted by LarryT
Couldn't find anything with a search. I loosened the bolts for a re-torque. My recollection is 38 - 40 ft.-lbs. Can someone please confirm. I know it's on the back of the hub - I'm trying to avoid taking it off
Thanks,
LarryT
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Not that familiar with the 2-blade, but my 3-blade has the torque information on the side of the hub between blades.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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03-02-2013, 09:01 PM
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Join Date: Aug 2006
Location: Battle Ground, WA
Posts: 426
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Bolt size is 7/16
..and yes, Mel, I am perfectly aware that the info is on the hub where I can't read it without taking the prop completely off (see post #1). Call me lazy if you wish, but I am really anxious to get this plane back in the air. I am going to write it on the spinner bulkhead. In the future I will just be able to back off the bolts, then re-torque the next day.
LarryT
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03-02-2013, 09:45 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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Quote:
Originally Posted by Mel
Not that familiar with the 2-blade, but my 3-blade has the torque information on the side of the hub between blades.
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Yes Sir... on mine too. 
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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03-03-2013, 06:16 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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I'm confused!
Quote:
Originally Posted by LarryT
..and yes, Mel, I am perfectly aware that the info is on the hub where I can't read it without taking the prop completely off (see post #1). Call me lazy if you wish, but I am really anxious to get this plane back in the air. I am going to write it on the spinner bulkhead. In the future I will just be able to back off the bolts, then re-torque the next day.
LarryT
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I can read mine with the prop on the engine and torqued. It's on the SIDE of the hub.
Is yours different?
I don't understand why it can't be read without removing the prop.
What am I misunderstanding?
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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03-03-2013, 07:51 PM
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Join Date: Aug 2006
Location: Battle Ground, WA
Posts: 426
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Mel, you are correct
I guess it was really late or I was relying on poor memory. 38 ft.-lbs. I think I will take a day or two off. Working on the plane after a 12 hr. day that include 5 hrs. of car travel and 1:15 commercial return flight was not the best idea.
Larry
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03-03-2013, 08:05 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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38 FT LBs was the old torque... 40 has been standard for the last 7 years for 7/16" Bolts.
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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03-03-2013, 08:14 PM
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Join Date: Mar 2010
Location: USA
Posts: 452
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Quote:
Originally Posted by RVadmirer
Depends on the bolt size.....
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No sir, it doesn't. But I'm glad to see you (or a mod) deleted your subsequent rude, pointless, and snarky post. For a specific hub thickness, Craig uses the same torque for both 7/16" and 1/2" bolts. With a 3 1/2" thick prop hub, he ups it from 40 to 45 lbs. Standard torque value charts per bolt size do not apply to Catto props.
Last edited by luddite42 : 03-03-2013 at 08:18 PM.
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