[mcgaughy]

I need to sandwich a fiberglass part between two aluminum sheets. I also would like to buck the rivets verses using blind rivets.

Do I need to use soft rivets or are the typical hard rivets we use OK?

 

[cajunwings]

Sandwich

Lots of variables, but it can be done. If the fiberglass is strong and or flexible it will likely tolerate being riveted in a 2 sheet sandwich without fracturing around the rivets although it may show up as the years go by. -3 dia rivets are better here than -4, also better to drive the rivets a little less than more which will lessen the clamping forces. In non-structural applications I like to use the soft rivets (no dimple & no letter after AN426 or 470). As an example I riveted my airscoops in the side skins with AN426-4-4 soft rivets with small .020 alum backing plates for each rivet.

Don Broussard
RV9 Rebuild in Progress
57 Pacer