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05-09-2011, 10:41 PM
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Join Date: Oct 2009
Location: Houston
Posts: 65
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Stupid riveting question
I have gotten to the step of riveting the elevator spars. Which side do the shop heads go on, front or rear? It doesn't appear to be specified in the drawings which only specify the rivet size. I looked through chapter 5 several times but it doesn't say.
Is there a convention like bolts (head always to the front)?
Thx,
Mark Jackson
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05-09-2011, 11:06 PM
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Join Date: Nov 2005
Location: KRTS
Posts: 1,798
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Pay close attention to the plans, the call outs should dictate which way everything goes.
__________________
Next?, TBD
IAR-823, SOLD
RV-8, SOLD
RV-7, SOLD
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05-09-2011, 11:22 PM
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Join Date: Dec 2006
Location: Colorado Springs
Posts: 576
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Unless specified otherwise, the manufactured head (from the factory) is on the thinner material. Examples would be the flange of a rib, a thin web, skins, etc.
Shop heads (the ones you make) usually go on the thicker material. Examples are: doublers, thicker flange, etc.
This keeps method prevents the thinner material from disorting while compressing the rivet.
There are some times this is not possible due to access. Do what you are able in those cases.
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05-09-2011, 11:27 PM
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Join Date: Jul 2009
Location: Lee's Summit, MO
Posts: 747
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Rivets
It isn't called out on the plans. Do a search and you'll find lots of threads on the subject. One school of thought is to put the manufactured head to the outside. Another other school of thought is to put the manufactured head on the thinnest material. Often times, the best way is the direction that allows the easiest setting of the rivet. I put the manufactured head to the outside on the empennage spars and did see a little bowing of the spar after riveting. I think if you put the manufactured head to the inside on the thinner material, you won't get as much deformation.
__________________
Robert Williams
Lee's Summit, MO
RV-8 - Empennage & Wings Done
Working on Fuse
O-360-A1A
1946 Cessna 120
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05-10-2011, 06:05 AM
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Join Date: Dec 2010
Location: Alpharetta, GA
Posts: 88
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MIL Spec MIL-R-47196A
MIL-R-47196A says:
Quote:
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Section 3.3.3.1 - Head direction. Unless specified on the engineering drawing or specification, the manufactured head of the rivet shall be located on exterior surfaces.
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- John
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05-10-2011, 06:39 AM
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Join Date: Jun 2010
Location: McKinney, TX
Posts: 689
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I asked a similar question before. The answer I was given made perfect sense. Vans rivet call out gives you the answer.
Quote:
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AN470AD4-7 all HS-412PP to HS-609PP to HS-603PP rivets
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The order the material is listed is the order that the rivet will pass through. The factory head sits against HS-412PP and passes through HS-609PP and the shop head sits against HS-603PP. This has worked for me so far.
__________________
Gil Brice
McKinney, TX EAA-1246
RV7 - Working on fuse, fuel, brakes etc...
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05-10-2011, 07:04 AM
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Join Date: May 2005
Location: Lincoln, NE
Posts: 73
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RVator
Van's had a article on this in an old RVator a few years back. Their conclusion was it didn't matter. I've had good luck using Sean B's theory.
Doug
RV-7 Fuselage 70%
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