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05-12-2016, 11:29 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,514
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Saber Spacer Retorque Needed?
CS prop - we go to a lot of trouble safety wiring the CS prop bolts, and for those with a Saber spacer behind it, there are no safety wires for those bolts.
Has anyone ever removed the prop to recheck the spacer bolt torque?
What do you do?
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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05-12-2016, 12:32 PM
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Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
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My prop spacer is, of course, safety wired and marked with torque seal. There has never been any evidence of movement of any kind, and I check it carefully every time I pull and retorque the prop, i.e every 100 hrs or less. My belief is the steel prop spacer is dimensionally stable and not likely to have a fastener loosen up. That is less the case with the Catto composite prop.
I'm thinking I will pull the spacer and retorque at 500hrs regardless.
__________________
Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
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05-12-2016, 12:44 PM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,957
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Funny, I just did this last night. Removed the prop to inspect prop, bulkheads, spacer, lugs, etc for annual condition inspection. Checked torque on bolts attaching Saber spacer to engine flange. After checking that none of the bolts would rotate more, I even loosened some to check if they were over-torqued. All bolts were still within the proper range.
__________________
Kurt W.
RV9A
FLYING!!!
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05-12-2016, 07:58 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,514
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Thanks, Guys.
I have the 2.5" spacer and there is no provision for safety wire, but I assume the longer bolts will stay tight due to the longer stretch length. Assumptions are not enough, though, thus this data search.
It will go on the annual list. Should it be checked in Phase I also?
Thanks
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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05-13-2016, 01:00 AM
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Join Date: Mar 2014
Location: Laguna Hills, CA
Posts: 1,805
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Saber recommends LocTite on these bolts...can't remember offhand whether it's red or blue.
__________________
Doug
RV-9A "slider"
Flew to Osh in 2017, 2018 & 2019! 
Tail number N427DK
Donation made for 2020
You haven't seen a tree until you've seen its shadow from the sky -- Amelia Earhart
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05-13-2016, 07:20 AM
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Join Date: Jan 2005
Location: Tulsa, OK
Posts: 1,014
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Blue Loctite
Just installed a new Saber spacer and they state to use blue locTite on the retaining bolts
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05-13-2016, 07:29 AM
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Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
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oh yeah ... Dave jogged my memory. I also used blue Loctite as recommended by Sam at Saber. 
__________________
Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
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