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02-17-2008, 08:58 AM
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Join Date: Apr 2007
Location: Norway, Stj?rdal
Posts: 598
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Platenuts?
I looked at the platenuts for the rudder/elevator that came with the kit (Bag 414). The "aft" side of them does not look circular, and the hole is off center. When measuring I get 8.2 to 8.7 mm ovalization of the hole. On the "fwd" side they look ok and with a measurement of 8.5 mm. When trying by hand, it is impossible to get the bolt more than 2-3 turns before it get stuck by the ovalization.
Is this supposed to be correct (some kind of lock-tight function)? To me it looks like forcing them in will destroy the threading.
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02-17-2008, 09:01 AM
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Join Date: Jan 2005
Location: Arkansas
Posts: 1,505
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They are supposed to be that way. Some people run a tap through them to loosen them up a bit.
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Jim Wright
RV-9A N9JW 90919 SoldArkansas
http://www.jimsairplanes.com
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"It's a brutal struggle for the biscuit."
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02-17-2008, 09:03 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Yes, the oval shape is what gives the locking feature.
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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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02-17-2008, 10:51 AM
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Guest
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Join Date: Jan 2005
Location: Arizona
Posts: 613
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Tap Them
Tap them first and they work perfect, for me anyway. Hope that helps.
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02-17-2008, 11:00 AM
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Join Date: Jan 2005
Posts: 3,642
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Quote:
Originally Posted by gbrasch
Tap them first and they work perfect, for me anyway. Hope that helps.
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If you tap them they lose the locking feature. Is that really what you want to do?
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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02-17-2008, 11:08 AM
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Join Date: Nov 2007
Location: Benton City, WA
Posts: 201
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no lock
Quote:
Originally Posted by gbrasch
Tap them first and they work perfect, for me anyway. Hope that helps.
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If you tap them are you not defeating their locking properties?
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Harold Irvine
N912HM RV-12 Flying.
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02-17-2008, 11:09 AM
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Join Date: Dec 2005
Location: Hamilton, New Zealand
Posts: 632
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You won't do it by hand...
...but a screwdriver and a bit of boelube make life a whole lot easier...
I don't think tapping them out is a good idea; as previously mentioned, this will probably ruining the locking feature of the nutplate.
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02-17-2008, 11:14 AM
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Join Date: Jan 2005
Location: albuquerque, nm
Posts: 1,167
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Quote:
Originally Posted by Hal-san
If you tap them are you not defeating their locking properties?
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Yes, If you tap them you defeat their locking properties. They're ovalled for a reason. |
02-18-2008, 06:51 AM
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Join Date: Sep 2006
Location: Bozeman, Montana
Posts: 858
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Quote:
Originally Posted by Guy Prevost
Yes, If you tap them you defeat their locking properties. They're ovalled for a reason.
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Of course if you put a screw in once you no longer have locking if you remove it... Which is the whole reason we have nutplates in the first place. I find tapping them makes for fewer damaged screws because they require so much less torque to go in.
Hans |
02-18-2008, 06:56 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Not true!
Quote:
Originally Posted by nucleus
Of course if you put a screw in once you no longer have locking if you remove it... Which is the whole reason we have nutplates in the first place. I find tapping them makes for fewer damaged screws because they require so much less torque to go in.
Hans
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Tapping cuts the threads thereby defeating the locking feature. Inserting a screw causes the "oval" shape to flex so the locking feature is not defeated. Of course if you insert a screw a thousand times, you will eventually wear them down. But a few times won't do it.
__________________
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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