Original Posted By: Greg Bacon
Greg,Most sheet metal shops should have a "bead roller" if that is what you refering to.Just make sure they use the proper bending radius, most don't bother with this and your corners will be to sharp.With resulting fatigue cracks developing in time.Harbour freight has a bead roller for sale, not cheap anymore.But this one needs modification to avoid the sharp corners.BRHansNX15KV-----Original Message-----
Pietenpol-List: aluminum - stiffening ribs
Re: Pietenpol-List: aluminum - stiffening ribs
Original Posted By: Greg Bacon
Kent White put a stiffening X in the sides of a gas tank he was building at Oshkosh several years back by using a piece of medium density fiberboard with grooves routed into it. The router bit was a 3/4=9D round end bit and it was a long narrow X. He then clamped the aluminum sheet to the fiberboard and used a small air hammer, like an air muffler chisel, with something like a rivet tool with a plastic tip that he sells and just went down one groove and then the other. Slick as cat poop on linoleum!
Kent White put a stiffening X in the sides of a gas tank he was building at Oshkosh several years back by using a piece of medium density fiberboard with grooves routed into it. The router bit was a 3/4=9D round end bit and it was a long narrow X. He then clamped the aluminum sheet to the fiberboard and used a small air hammer, like an air muffler chisel, with something like a rivet tool with a plastic tip that he sells and just went down one groove and then the other. Slick as cat poop on linoleum!
Pietenpol-List: aluminum - stiffening ribs
Original Posted By: Dan Gaston
Pietenpol-List: aluminum - stiffening ribs
Original Posted By: Greg Bacon
> > --> Pietenpol-List message posted> > by: "tdudley(at)umn.edu"> > > >> > Last month the question was raised about epoxy vs. nailing> > the ribs to the spars. It seemed to be that either> > method was acceptable and the responses given were in favor> > of nails.> >> > I am using the 4-3/4" X 3/4" solid spars. The ribs> > are built to plans (1/2" wide X 1/4" thick spruce attachment> > to the spar).> >> > I'll ask this question after reviewing the archives and> > after reading the Bingelis books-- are 20 gauge nails> > appropriate here or do you use 18 gauge, or does it really> > even matter since the difference is so slight? To get> > 3X the thickness of the surface wood (i.e., 1/4"), I plan on> > using nails 1" in length. I know it's another of my> > "soft" questions, but I was just interested in knowing what> > others have done that has worked.> >> > Having asked this, I promise I will not ask how to hold the> > hammer to place the nails.> >> > Tom> >> >> >> >> > Read this topic online here:> >> > http://forums.matronics.com/viewtopic.p ... 964#359964> >> >> >> >> >> >> >> > Lists This Month --> > Some AWESOME FREE Gifts!)> > Raiser. Click on> > out more about> > Gifts provided> > www.aeroelectric.com> > www.buildersbooks.com> > www.homebuilthelp.com> > -Matt> > Dralle, List Admin.> > Email Forum -> > FAQ,> > - MATRONICS WEB FORUMS -> > List Contribution Web Site -> > -Matt> > Dralle, List Admin.> >> >> >> >>>-- Greg Bacon________________________________________________________________________________Date: Thu, 1 Dec 2011 08:08:40 -0600Subject: Pietenpol-List: aluminum - stiffening ribs
> > --> Pietenpol-List message posted> > by: "tdudley(at)umn.edu"> > > >> > Last month the question was raised about epoxy vs. nailing> > the ribs to the spars. It seemed to be that either> > method was acceptable and the responses given were in favor> > of nails.> >> > I am using the 4-3/4" X 3/4" solid spars. The ribs> > are built to plans (1/2" wide X 1/4" thick spruce attachment> > to the spar).> >> > I'll ask this question after reviewing the archives and> > after reading the Bingelis books-- are 20 gauge nails> > appropriate here or do you use 18 gauge, or does it really> > even matter since the difference is so slight? To get> > 3X the thickness of the surface wood (i.e., 1/4"), I plan on> > using nails 1" in length. I know it's another of my> > "soft" questions, but I was just interested in knowing what> > others have done that has worked.> >> > Having asked this, I promise I will not ask how to hold the> > hammer to place the nails.> >> > Tom> >> >> >> >> > Read this topic online here:> >> > http://forums.matronics.com/viewtopic.p ... 964#359964> >> >> >> >> >> >> >> > Lists This Month --> > Some AWESOME FREE Gifts!)> > Raiser. Click on> > out more about> > Gifts provided> > www.aeroelectric.com> > www.buildersbooks.com> > www.homebuilthelp.com> > -Matt> > Dralle, List Admin.> > Email Forum -> > FAQ,> > - MATRONICS WEB FORUMS -> > List Contribution Web Site -> > -Matt> > Dralle, List Admin.> >> >> >> >>>-- Greg Bacon________________________________________________________________________________Date: Thu, 1 Dec 2011 08:08:40 -0600Subject: Pietenpol-List: aluminum - stiffening ribs