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  #1  
Old 07-09-2018, 05:52 PM
Dave12 Dave12 is offline
 
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Default Filled rivet heads

Does anyone remember what Geico (Larry Geiger) used to fill the rivet heads on the Rv12 he built?
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  #2  
Old 07-09-2018, 05:57 PM
Mich48041 Mich48041 is offline
 
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I remember that he used a syringe. I do not remember what was in it.
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  #3  
Old 07-09-2018, 06:02 PM
Mich48041 Mich48041 is offline
 
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I did a google search for "syringe vansairforce geico" without quotes and found THIS thread. Larry mentioned Superfil.
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  #4  
Old 07-09-2018, 07:39 PM
David Paule David Paule is offline
 
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I've heard of using 3M's 2216 epoxy from a syringe.

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  #5  
Old 07-10-2018, 02:55 AM
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engineerofsorts engineerofsorts is online now
 
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Default I used colored epoxy

I used a rather fine-gauge syringe with the plain old west system resin/hardener I used on the fiberglass. I found it difficult to see how much epoxy was going in the hole, so I used some colorant (comes in a tube from West) to give it some opacity. Since my rivet puller tended to leave a burr on the mandrel hole, I gently demurred the hole before filling with epoxy. If the epoxy is a little too high, it can then be easily sliced off with a blade after curing. (If there is a burr, it makes sliced the excess off a real pain). It sounds, and is, tedious, but I would guesstimate I did the exterior rivets on the entire plane in about eight hours, and Iím quite pleased with the results after painting.
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  #6  
Old 07-10-2018, 09:40 AM
bcondrey bcondrey is offline
 
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I ran into Larry a few weeks ago and that very subject came up. He used a syringe and needle from a farm supply store and injected micro into the rivet heads. Subject came up while he was looking at the local Aviation Nation RV-12 teen build that Iím helping with.
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  #7  
Old 07-10-2018, 11:45 AM
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Phantom30 Phantom30 is offline
 
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I can verify that filling rivets will add .0001 knots to cruise speed 🤓
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  #8  
Old 07-10-2018, 09:43 PM
rv9builder rv9builder is online now
 
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Is appearance the only reason to fill the rivet heads? Is there a practical reason, like keeping water out of the wings and fuselage when it rains or preventing loose mandrels from falling out?
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  #9  
Old 07-10-2018, 10:01 PM
RFSchaller RFSchaller is offline
 
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Looks like the answer to the question nobody asked!😜
Definitely more work than I want to do.
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  #10  
Old 07-11-2018, 03:12 AM
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Gagarin737 Gagarin737 is offline
 
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Quote:
Originally Posted by rv9builder View Post
Is appearance the only reason to fill the rivet heads? Is there a practical reason, like keeping water out of the wings and fuselage when it rains or preventing loose mandrels from falling out?
The reason for me to fill the rivet heads was to keep the dirt out. I saw an aircraft with unfilled rivets and that particular plane had black strips running from the rivets.
It took about 40 hours to fill/sand all rivets, not that bad.
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