Bullseye
Well Known Member
Hey all,
I just started working on the rudder, and have some questions about backriveting. All comments about "backriveting is so easy, a monkey could do it" aside, I am having trouble with a couple things.
1) I bought a 12" double offset backriveting set, and am having a hard time using it. Even with the pressure up near 50 psig, it doesn't seem to want to set rivets very well. I have a feeling that the length is causing some of the force to not transfer down to the rivet as well. Anyone seen this issue with these long sets? (Please forgive the dirty workbench, ski wax soaks right into MDF. Ask me how I know.)
2) Because of my rivet set issue, I switched over to a cupped set (which I heard someone suggest), but got these results. Notice the very slight rounded corner of the rivet shop head. I can't imagine this is an issue, but it would be nice to hear you guys agree with me.
3) The furthest aft rivet in the stiffener. I am using the tank dies on understructure, which leads me to bump up the rivet sizes in some places to get the proper length unset rivet. When I read that the last rivet in the row should be set fully, I figured I would just leave the original AN426AD3-3 size in the last hole. After setting, I think the shop head is a little small. It's not perfect, but is it worth drilling out given that this area will be covered in RTV and close to the pro-sealed trailing edge? I'm good at drilling rivets out, but I'm tempted to leave it. What do you guys think?
Sorry about the large pictures. I have to weight smaller pictures here or larger picture for the build log. (I thought there was a thumbnail option here, but I can't seem to find it.)
I will agree, though, backriveting does produce wonderful results.
I just started working on the rudder, and have some questions about backriveting. All comments about "backriveting is so easy, a monkey could do it" aside, I am having trouble with a couple things.
1) I bought a 12" double offset backriveting set, and am having a hard time using it. Even with the pressure up near 50 psig, it doesn't seem to want to set rivets very well. I have a feeling that the length is causing some of the force to not transfer down to the rivet as well. Anyone seen this issue with these long sets? (Please forgive the dirty workbench, ski wax soaks right into MDF. Ask me how I know.)
![20100225-004-large.jpg](/community/proxy.php?image=http%3A%2F%2Fn999za.files.wordpress.com%2F2010%2F02%2F20100225-004-large.jpg&hash=87c69d76a3cb0f5ee49ffdeef2d451a2)
2) Because of my rivet set issue, I switched over to a cupped set (which I heard someone suggest), but got these results. Notice the very slight rounded corner of the rivet shop head. I can't imagine this is an issue, but it would be nice to hear you guys agree with me.
![20100225-010-large.jpg](/community/proxy.php?image=http%3A%2F%2Fn999za.files.wordpress.com%2F2010%2F02%2F20100225-010-large.jpg&hash=1bf7a3a4f2cec95c48a2cd0f4e11163d)
3) The furthest aft rivet in the stiffener. I am using the tank dies on understructure, which leads me to bump up the rivet sizes in some places to get the proper length unset rivet. When I read that the last rivet in the row should be set fully, I figured I would just leave the original AN426AD3-3 size in the last hole. After setting, I think the shop head is a little small. It's not perfect, but is it worth drilling out given that this area will be covered in RTV and close to the pro-sealed trailing edge? I'm good at drilling rivets out, but I'm tempted to leave it. What do you guys think?
![20100225-008-large.jpg](/community/proxy.php?image=http%3A%2F%2Fn999za.files.wordpress.com%2F2010%2F02%2F20100225-008-large.jpg&hash=f61fc9c7a023e6d2fe4a50ca40b8eaf8)
Sorry about the large pictures. I have to weight smaller pictures here or larger picture for the build log. (I thought there was a thumbnail option here, but I can't seem to find it.)
I will agree, though, backriveting does produce wonderful results.
![20100225-007-large.jpg](/community/proxy.php?image=http%3A%2F%2Fn999za.files.wordpress.com%2F2010%2F02%2F20100225-007-large.jpg&hash=75dedf595c5553ee615e87c1a5373cbe)