RV8 Builder 84943
Member
Hi all.
I'm having a problem with rivets falling over while attempting to back rivet the stiffeners onto the rudder skin. After completing all the rivet work on the Horizontal and Vertical stab, I did not anticipate this giving me grief. I have double checked the rivet length and even confirmed that the 3-3.5s that the plans call for are correct with Vans. I noticed that my back rivet set couldn't be centered due to the inside radius of the stiffeners. I tried again on a test piece after shaving off some of the slip guard on the back rivet set, but I'm having the same problem. I do notice that its a bit difficult to keep the gun from slipping while applying solid pressure, but even on ones that I detected no slippage, they're still falling over. I'm so surprised that I've not yet encountered any other stories of similar troubles. My HS and VS went very well and I'm extremely happy with the quality of the work. I'm at a loss for what to do next. Am I doing something really stupid? Any advice? Has anyone else had difficulty with back riveting stiffeners?
I've attached an image so you can see what I mean.
Thanks.
I'm having a problem with rivets falling over while attempting to back rivet the stiffeners onto the rudder skin. After completing all the rivet work on the Horizontal and Vertical stab, I did not anticipate this giving me grief. I have double checked the rivet length and even confirmed that the 3-3.5s that the plans call for are correct with Vans. I noticed that my back rivet set couldn't be centered due to the inside radius of the stiffeners. I tried again on a test piece after shaving off some of the slip guard on the back rivet set, but I'm having the same problem. I do notice that its a bit difficult to keep the gun from slipping while applying solid pressure, but even on ones that I detected no slippage, they're still falling over. I'm so surprised that I've not yet encountered any other stories of similar troubles. My HS and VS went very well and I'm extremely happy with the quality of the work. I'm at a loss for what to do next. Am I doing something really stupid? Any advice? Has anyone else had difficulty with back riveting stiffeners?
I've attached an image so you can see what I mean.
Thanks.