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04-04-2011, 04:47 AM
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Join Date: Apr 2011
Location: Pretoria, South Africa
Posts: 17
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Pre-heating rivets?!
Hi all, I am sitting in my hotel room staring at my RV empennage boxes I have just had delivered to the room!
A short while ago I got off the horn to a friend who said that pre heating the rivets and then dropping them into cold water will soften them up and make riveting easier and therefore less likely to hammer aberrations in the skin. I don?t want to start something here that Van hasn?t sanctioned but could anyone give me some advice?
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04-04-2011, 05:10 AM
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Join Date: Jan 2005
Location: Peachtree City, Ga
Posts: 1,040
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Rivets
NO!
KISS- Keep it simple __!
When you deviate from the plans and normal procedures you go off into the unknown. More trouble, unintended affects,etc
__________________
Vern Darley
Awarded FAA "The Wright Brothers 'Master Pilot' Award"- for 50 years safe flying
RV-6A N680V / RV-10QB N353RV
Luscombe 8E N2423K 50+years
Hatz Biplane N2423Z soon to be birthed
Falcon RV Squadron Founder
KFFC Hanger D-30
Peachtree City, Ga
770 310-7169
EAA Technical Counselor #5142
EAA Flight Advisor #486336
ATP/CFI/A&P/DAR
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04-04-2011, 05:13 AM
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Join Date: Apr 2011
Location: Pretoria, South Africa
Posts: 17
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Thanks... Best to start off that way.
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04-04-2011, 05:32 AM
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Join Date: Feb 2007
Location: colorado
Posts: 873
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read up and become informed
Before you start, you should get some books on standard practices and approved methods. Get some help from someone who knows these things. Building a safe airplane requires some basic knowledge and skills that can be easily learned, not following acceptable practices will cause you grief later on.
Good Luck
CM
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04-04-2011, 05:49 AM
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Join Date: Jan 2005
Location: Lake St. Louis, MO.
Posts: 2,346
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Quote:
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.....make riveting easier and therefore less likely to hammer aberrations in the skin....
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Forgoing your friend's well-intentioned advice, I'd be reluctant to alter the mechanical properities of rivets on an ad-hoc, home handyman basis. How do you insure quality control? I'm afraid your friend's thoughts may be based upon HIS observation and experiences. We cannot know the quality of the equipment he used or how skilled he was using that equipment. Those things can make a big difference. A good rivet gun teamed with an appropriately sized bucking bar and deft touch while setting those rivets is key to an easier riveting experience and go a long way towards avoiding hammering aberrations into the skin.
__________________
Rick Galati
RV6A N307R"Darla!"
RV-8 N308R "LuLu"
EAA Technical Counselor
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04-04-2011, 07:57 AM
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Join Date: Dec 2007
Location: Flagstaff, AZ
Posts: 2,653
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I seem to recall that this has been done before. The process is called annealing. But it is not clear what affect it will have on the strength of the riveted structure; do you really want to take a chance with your arse sitting inside? A true analysis of this is beyond most of us; better to stick to what Van's calls for. Besides, the -3 rivets drive easily in any case. The usual culprit for dings and 'smilies' is not the rivet but the gorilla using the gun and/or bucking bar. Practice on scrap and take reasonable care and you won't have a problem.
__________________
Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
http://www.mykitlog.com/flion/
EAA Technical Counselor #5357
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04-04-2011, 08:22 AM
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Join Date: Dec 2004
Location: Southlake, Texas
Posts: 626
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Heating Rivets
Pre-heat rivets? Not necessary!
If you look at the average spam-can, you will see that Van places the rivets closer together (more rivets) than the certified aircraft. No one has said this, but I think Van anticipated that the riveting out there in the field might not be perfect. Therefore, additional rivets were designed in to make up for less than perfect technique. In other words, the RV's are a bit overbuilt!
Relax and enjoy your project. If you build it with pride, and a burning desire to do as well as you can do, your RV will turn out fine!
__________________
Danny King
Beautiful Doll 80434 TT 1675 hours
I0360 A1B6 200 HP
Christen Inverted Oil
First Flight 12 July 2000
VAF Dues current for 2020
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04-04-2011, 09:01 AM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,958
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Please do not do this. Most of the structure of our RVs is fastener shear critical, not material bearing critical. Altering the structural properties of your rivets is a recipe for premature structural failure.
The bad thing about fastener shear critical structures is once one rivet is overloaded and fails, the others in that same joint try to pick up the load that the broken fastener used to carry, and they fail as well. In short, the entire joint "unzips" almost instantaneously.
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04-04-2011, 09:42 AM
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Join Date: Nov 2005
Location: KRTS
Posts: 1,798
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Quote:
Originally Posted by Rick6a
Forgoing your friend's well-intentioned advice, I'd be reluctant to alter the mechanical properities of rivets on an ad-hoc, home handyman basis. How do you insure quality control? I'm afraid your friend's thoughts may be based upon HIS observation and experiences. We cannot know the quality of the equipment he used or how skilled he was using that equipment. Those things can make a big difference. A good rivet gun teamed with an appropriately sized bucking bar and deft touch while setting those rivets is key to an easier riveting experience and go a long way towards avoiding hammering aberrations into the skin.
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^^^This. Plus a good pnumatic squeezer.
__________________
Next?, TBD
IAR-823, SOLD
RV-8, SOLD
RV-7, SOLD
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04-04-2011, 10:01 AM
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Join Date: Dec 2010
Location: Greeley, Colorado
Posts: 199
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You must be kidding
This sounds like an April Fools Joke! The uncontrolled adjusting of the mechanical properties of anything holding your A/C together sounds pretty crazy to me and I've been around the barn more than once.
__________________
John D. Artz, EAA 71811, 100+ Young Eagle flts
Adopted Dave's 6A
MXL Ultralight, only bleeding after 3 landings
Scorpion Two Helicopter, big mistake
PA-28 and 210E Centurion
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