Failing rivet sizing 101

[togaflyer]

Well, I have tried to figure our the correct rivet size I need to add a doubler plate for my antennas. The skin is.025, the doubler is .063 total thickness= .088

I plan to use AD 426-3 diameter size rivet. I have tried to use the formula but my brain is vapor locking and its not caculating out.

Oh masters of the RV 10 please help!

 

[alpinelakespilot2000]

Formula? Probably not the answer you're looking for but I don't think I used a rivet-length formula once during my entire build. A $2 rivet length gauge would probably be more helpful. Will pay for itself once or twice over!

Given that you're going through a piece of .060, my wild guess is that you'll probably need something like an AN426AD3-4.5 here.

Hope this is at least a little bit helpful.

 

[rocketman1988]

If you buy the river gauge set it usually comes with a little square length gauge

 

[az_gila]

If you want to be really cheap, use a 9/64 drill bit as a reference for the amount of rivet that should protrude before setting.

But, just buy the gauges, it's worth it.



PS 9/64 is 1.5 times the 3/32 rivet diameter...

 

[BigD]

If you must calculate, use material thickness + 1.5 x rivet diameter. So, in your case, you have .088 + 1.5(3/32) (assuming #3 rivet) or....

.088 + 9/64 = .088 +.141 = .229

rivet lengths are in 1/16 inch increments (.0625); .229/.0625 =3.66

So, either a 3.5 or a 4, but shorter is sometimes better than longer to avoid clinching. Drop a rivet in the hole and check for around 9/64 sticking out the other side...

(Example given in Van's builder's manual page 5-3)

==dave==

 

[togaflyer]

Thanks, I read the Garmin install documents and they recommended .063 for a doubler plate. Is this an overkill, I originally planed on .043 thickness as a doubler. This would be for a Comant ILS wisker antenna and a couple of GPS antennas.