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Fuel Cap Diameter

J Twilbeck

J Twilbeck

Well Known Member
My wings are getting painted and I need to know the diameter of the standard Vans stock fuel cap opening. Where the skin ends. Can anyone help?

I need to have a fuel placard made and I was going to make it surround the opening. I was thinking of just a vinyl sticker.

14 CFR 23.1557 States that the requirement have the word AVGAS and the minimum octane. I didn't see any of the circular placards for sale have the word AVGAS.

Thanks in advance.
 
Another option is to have the caps themselves engraved with the required info. I had my N#, 30 Gal US and 91 OCT MIN put on mine just to cover all of the bases.
 
Having the info (ie placard) displayed is still required. Engraving the caps is a placard in this case.
 
Something like this (it's not mine but mine are similar):

6c5d584e60ef.jpg


This is who did mine: http://www.aircraftspecialty.com/engraving.html
 
Last edited:
Auburntsts said:
Having the info (ie placard) displayed is still required. Engraving the caps is a placard in this case.
Click to expand...

That's what I was thinking. The engraved caps would be great but I don't have the wings back yet and when I do I don't want to wait on an engraver to finish the plane. I'm getting really close to being done. Plus I like the idea of the vinyl sticker to help protect around the fuel cap from fueling abuse.
 
2.25"

Greetings from a night at the airplane factory, where we've literally just finished the fuel tanks... that's proseal under my fingernail there :)

We didn't use the stock UD-3 caps so I have them sitting right here. The cap is 2.25" in diameter, and if I remember correctly, the skin opening was extremely tight around it.

Hope that helps!

IMG_1329.JPG
 
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