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tkj
06-02-2011, 08:51 PM
I'm building sc ribs from extruded t-section,what type pulled rivits should I use? When I use solit rivets they seem to deform the extrusion to each side of the rivet.

Steve Pierce
06-02-2011, 10:38 PM
Would soft solid rivets be strong enough?

tkj
06-03-2011, 07:31 AM
By soft I mean a as opposed tgo ad rivets. I would rather use 1/8 cherry max q but I'm not sure that's thed right pulled rivet.

Steve Pierce
06-03-2011, 07:35 AM
I am not a po rivet fan. Seen them vibrate loose too many times. Driven rivets work much better. I don't know anything about your rib design so have no idea the strength needed.

Check Six
06-04-2011, 08:30 AM
What size rivets are you using? What's the material thickness? Alloy? What's your edge distance? Are you bucking or squeezing?
Tom

tkj
06-04-2011, 10:25 PM
I'm using ad 4-4 rivets on .060 riveted to .016 alittle over 3/16 inch from edge. All is 2024t3. I' working with only 9/16 inch width and I can't get any closer to the cap strip or my squeezer heads will hit . I'm using a pnuematic squeezer and I have it set wright because the shop head mics out the wright height and diameter.

tkj
06-04-2011, 10:26 PM
I'm using ad 4-4 rivets on .060 riveted to .016 a little over 3/16 inch from edge. All is 2024t3. I' working with only 9/16 inch width and I can't get any closer to the cap strip or my squeezer heads will hit . I'm using a pnuematic squeezer and I have it set right because the shop head mics out the right height and diameter.

Steve Pierce
06-04-2011, 10:54 PM
You are using an 1/8" rivet that should have a 1/4" edge distance. Will 3/32" rivets not carry the load.

brown bear
06-05-2011, 12:51 PM
I tested a lot of different kinds of rivets when building my plane, it was eazy. I put a 500 lb weight on a set of scales and then riveted alum.test strips togeather with dif. kinds of rivets, used a host to lift the weight with the test strips and watched the scales to see how much each test strip pick up before shearing. It was kind of fun and I learned a lot. A 3/32 solid rivet is way stronger than .016 2024!, The 1/8" Avex pull rivets that kits like zenth 701 and others use
are less than 1/2 as strong as 3/32 solids!
Doug

Jim Miller
06-05-2011, 02:58 PM
I would look at some commercially manufactured ribs using similar material. I bet you will find the 3/32 rivets
to be adequate. I also grind a flat side to the squeezer dies to get closer to interferring edges.

Sonexpilot
06-05-2011, 09:25 PM
As a Sonex builder now starting on a Cub, I love pulled rivets! For what it is worth, almost all the rivets on the Sonex are 1/8 inch Cherry N commercial grade rivets (CCP-42 denoting the body and mandrel are stanless steel). Way cheaper than the "aerospace" version. Here is a link to the Aircraft spruce catalog that spells out the shear and tensile strength.
http://www.aircraftspruce.com/pdf/2011Individual/Cat11085.pdf

Good luck.

aktango58
06-05-2011, 10:09 PM
Sonex does not appear, from my brief look, to be a plane concerned with weight as much as we are with cubs....

Check Six
06-06-2011, 10:43 AM
You could grind the head of your rivet squeezer so that it would fit to give you the proper edge distance (1/4" min for the rivets you're using). I have lots of modified/ground down rivet sets, bucking bars, squeezer heads...

I'd switch to 3/32" rivets myself - plenty strong for the application.

Tom

Bugs66
06-06-2011, 10:52 AM
I would use 3/32 solid. Those are dumb simple to squeeze.

skywagon8a
06-07-2011, 06:23 AM
Ditto what Bugs66 said. Also place the manufactured head against the thinner (.016") material.