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12-13-2017, 06:42 PM
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Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,128
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Quote:
Originally Posted by Jeff A
The plans specifically call out:
AN4-11 Bolt
AN960-416 Washer
AN310-4 Nut
MS24665-208 Cotter Pin
I just replaced these the other week. |
That's absolutely true Jeff but I believe he's referring to the linkage that connects to the flap, not the flap motor.
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Tom Norwood
Classic "Short Tail 6A N822PM
TMX-O360. Phase 1
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12-13-2017, 06:54 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,787
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cotter pin
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Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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12-13-2017, 07:22 PM
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Join Date: Jul 2007
Location: Madison, Wisconsin
Posts: 778
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Quote:
Originally Posted by NYTOM
Castle nuts and cotter pins I believe are only used on bolts that will normally rotate. The rotation on the flap bearing should only be in the bearing.
Mel?
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My understanding is that the bolt in question is the one that captures the end of the flap motor. There's no bearing there, just a hole in the motor casing that will tend to rotate the bolt. Hence the need for a cotter pin.
If its the bolt holding the flap control rod then yes, it has a rod-end bearing.
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Alan Carroll
RV-8 N12AC
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12-13-2017, 07:26 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,761
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Yep! that one needs a cotter pin.
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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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12-13-2017, 08:15 PM
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Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,128
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Quote:
Originally Posted by Alan Carroll
My understanding is that the bolt in question is the one that captures the end of the flap motor. There's no bearing there, just a hole in the motor casing that will tend to rotate the bolt. Hence the need for a cotter pin.
If its the bolt holding the flap control rod then yes, it has a rod-end bearing.
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I got it now. That photo shows a motor right over the flap linkage. Mine is centered. I never considered the motor being mounted on the side.
__________________
Tom Norwood
Classic "Short Tail 6A N822PM
TMX-O360. Phase 1
Last edited by NYTOM : 12-13-2017 at 08:20 PM.
Reason: Confused by photo
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12-13-2017, 10:26 PM
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Join Date: Jan 2016
Location: Chiloquin OR
Posts: 94
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As its shown unless otherwise specified as my grey matter says if the object the nut and head of bolt does not rotate you don't have to put a castle nut with cotter key on. If the item that is secured by the nut and bolt rests against the bolt or nut if I can explain it right, such as if it only had one tab instead of two then the castle nut assembly would be the proper way. I don't have the FAR to refer to.............anyone? But if the manufacture says to do something in there instructions you follow that.
Again anyone? Boyd
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12-14-2017, 07:15 AM
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Join Date: Apr 2015
Location: Houston, TX
Posts: 11
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I see evidence of both tightening and loosening on that nut. Nylocks are not to be reused. They are not effective on second use since the nylon will be deformed by the previous use.
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12-14-2017, 07:21 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,761
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Not quite true......
Quote:
Originally Posted by Flynjay
I see evidence of both tightening and loosening on that nut. Nylocks are not to be reused. They are not effective on second use since the nylon will be deformed by the previous use.
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Nylock nuts may be reused as long as the nut cannot be "turned by hand". ref. AC 43-13. Many people have their own rule of thumb. Some use them only once. Some use them only 3 times. etc.
__________________
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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12-14-2017, 08:22 AM
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Join Date: Jul 2010
Location: SF Bay Area
Posts: 247
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There should be at least one thread showing beyond the nut when properly torqued. The photo show some gap. Verify that the proper bolt is being used per the plans.
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http://jimsrv.blogspot.com
PP - ASEL
Instrument Rating
A&P/IA Rotax iRMT 9 Series Maintenance
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RV12 Flying.
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12-14-2017, 11:25 AM
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Join Date: Jan 2016
Location: Chiloquin OR
Posts: 94
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Quote:
Originally Posted by waterboy2110
There should be at least one thread showing beyond the nut when properly torqued. The photo show some gap. Verify that the proper bolt is being used per the plans.
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Looks more like it was never tightened or had been and did not lock due to too much use as per regs on nylon lock nuts. The gap is wrong due to one or those two items.
Also due to the way its used don't think one would torque it, should be just snug as they need the actuator to be able to move so it can stay aligned.
Last edited by EXflyer : 12-14-2017 at 11:47 AM.
Reason: Add more data
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