A place where restoration project-type threads can go to avoid falling off the main page in the WIX hangar. Feel free to start threads on Restoration projects and/or warbird maintenance here. Named in memoriam for Gary Austin, a good friend of the site and known as RetroAviation here. He will be sorely missed.
Sun Mar 15, 2009 12:40 am
Hello Folks:
Anyone know how to put drain hole fasteners in on fabric covered surfaces? Anyone have nomenclature for this?
Thanks,
Sun Mar 15, 2009 4:33 am
Its called a grommet, and they are usually doped on to the clear coats under the pigmented coats.
Sun Mar 15, 2009 10:35 am
Glue the grommets in like DZ says. There are two types, plain round, and sea plane grommets that have a reverse scoop on them. After you complete the flying surface you burn through the fabric (If man made) with a soldering iron.
Sun Mar 15, 2009 12:33 pm
Hello Folks:
That's good to know, but what's used when you want to go through 1 layer of fabric and 1 layer of sheet metal? Thanks a lot.
Sun Mar 15, 2009 8:41 pm
A2C wrote:Hello Folks:
That's good to know, but what's used when you want to go through 1 layer of fabric and 1 layer of sheet metal? Thanks a lot.
Drill bit, just go slow through the fabric where the gromet is.
Sun Mar 15, 2009 10:30 pm
Hi Jeff:
No, that's not it. It's looks like a rivnut that fastens the farbic to the metal. I was just wondering it there is something else used that looks a little like a rivnut.
Thanks
Sun Mar 15, 2009 10:49 pm
This is on a T-6? Do you have a photo of the area?
Mon Mar 16, 2009 8:34 pm
Move the grommet away from the metal (or just glue another on)
Mon Mar 16, 2009 9:54 pm
Can't be done. Basicly it's similar to a rivnut.
Mon Mar 16, 2009 10:48 pm
On a T-6? Doesn't sound familar, like BDK says send photo and prove us wrong.
Tue Mar 17, 2009 12:05 am
Sorry too lazy to take a picture..I don't want to prove anything, just needed an answer to that. I think I'll call my hardware supplier, and see if he knows.
Thanks!
Tue Mar 17, 2009 1:43 am
For the Acceptable Method, consult the AC 43.13-1B; Section 2-14 "Inspection Rings and Drain Grommets". Found on Pages 2-22 and 2-23.
If you don't have the text, it can be downloaded from the FAA website for free. If downloading just the chapter needed, it would be "Chapter Two- Fabric Covering."
Sun Mar 29, 2009 6:48 pm
Also, if you are using Poly Fiber, you can use poly tack to put the grommet up and a small soldering iron to burn a hole through the fabric. If the fabric is on sheet metal, you may not even need a grommet. consult the poly-fiber book.
Sun Apr 05, 2009 8:25 pm
Suggest you not use grommets. Just use soldering iron to make hole. Over time, the grommets come unstuck. Grommet are a carry over from the cotton days.
Sun Apr 05, 2009 11:01 pm
I hate to say it, but all the responses miss the mark. The fabric is over metal. The metal is enclosed, and so the drain hole is similar to a rivnut and goes through the fabric and metal. All I was asking is if anyone knows excactly the type of fastener/drain reinforcement used.
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