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08-18-2013, 09:11 AM
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Join Date: Jan 2010
Location: Port Angeles WA
Posts: 250
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Screws for wingtips
I am mounting the wingtips. The plans say either screws (removable) or rivets. I need to make it removable because antennae and lights are mounted in the tip. The choice of screws seems to be 6-32 or 8-32. Which size screws have you used? Why the choice?
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08-18-2013, 09:16 AM
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Join Date: Oct 2006
Location: Brooksville, FL
Posts: 356
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Screws for wingtips
I used 6-32 srews in the provided hole locations. My wingtips are also gas tanks (9.5 gals each). I've not seen any indications of tip movement.
Quote:
Originally Posted by jay.pearlman
I am mounting the wingtips. The plans say either screws (removable) or rivets. I need to make it removable because antennae and lights are mounted in the tip. The choice of screws seems to be 6-32 or 8-32. Which size screws have you used? Why the choice?
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__________________
Fred Stucklen
wstucklen1@cox.net
RV-7A N924RV Flying (1825 Hrs & counting)
RV-6A N926RV 875 Hrs (Sold)
RV-6A N925RV 2008 Hrs (Sold)
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08-18-2013, 09:21 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Eights are tough because they're so near the edge you get a wavy skin. Bigger heads are hard to get flush also. Some guys have used fours, but I hate fours because they strip or snap so easily. So.....sixes, I guess.
__________________
Actual repeat offender.
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08-18-2013, 10:34 AM
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Join Date: Mar 2006
Location: Ft Myers, FL
Posts: 276
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Cleaveland wingtip kit
I used the Cleaveland wingtip kit but I also used Click-Bond nutplates that are cemented to the wingtip with a two part epoxy. Easy to install and easy to remove if necessary.
__________________
Bill Near
RV-7A Flying
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08-18-2013, 11:02 AM
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Join Date: Jul 2009
Location: Petaluma, CA
Posts: 233
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Quote:
Originally Posted by Stoo
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then also go to microfasteners.com and buy #4 torx screws and you have a really nice, low stripping solution.
I found that the screws that came with the cleveland tool kit stripped very easily. I tried everything including flattening the tip on a high quality new screw driver tip to get a deeper bite in the screw head-- still stripped.
torx is the way to go.
__________________
Bill Mason
RV7 SB in construction
Avionics, Wiring, FWF, interior, and paint to go.
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08-18-2013, 11:02 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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I agree, #6 are the best here.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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08-18-2013, 11:41 AM
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Join Date: Jan 2005
Location: Chandler, AZ
Posts: 2,904
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Don't use 4-40's!!!
I would definitely not use 4-40's they are simply too small and the screw heads are easy to strip out. I did one wing tip with these and removed and replaced with 6-32. Better grip and MUCH cheaper. I can't recall any other 4-40's in the construction.
Regarding Torx, I don't get the fascination with them. You gain no advantage over Phillips. Now you have to carry a few extra Torx and the proper wrench.
Remember to use the back up metal strips when you attach the nut plates to the glass.
__________________
Darwin N. Barrie
Chandler AZ
www.JDair.com
RV-7 N717EE-Flying (Sold)
RV-7 N717AZ Flying, in paint
EMS Bell 407,
Eurocopter 350 A-Star Driver
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08-18-2013, 11:51 AM
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Join Date: Oct 2005
Location: Independence, OR
Posts: 396
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6-32 for me ...
I hate to sound like a clueless "me too-er" but I like many others, I used 6-32's.
It was easy to make the decision: weigh a bag of seventy-eight (!) 6-32 screws and nutplates and weigh a bag of 8-32s <g>.
I've had no issues with the smaller screw heads using proper techniques (Boelube on initial installation, good #2 Phillips bit).
--
Joe
__________________
Joe Dubner
RV-8A
Independence, OR
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08-18-2013, 12:38 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,156
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Our current airplane has 4-40 torx. I'm not going to do that again. Next one has 6-32 phillips.
__________________
Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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