Original Posted By: "tools"
Thanks for the info. I think I will go ahead and send in to have it applied tothe plane. Work schedule and God willing, I would like to be in the air by theend of the year. Thanks, Bryan--------Working Piet N5289BWhile I may not always be right, I apologize well.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Wing spar routing jig.
Pietenpol-List: Wing spar routing jig.
Original Posted By: "Cuy, Michael D. (GRC-RXD0)[ASRC AEROSPACE CORP]"
I recently did a project for the EAA on their 1919 Standard J-1 biplane restoration.One wing spar was BADLY dry rotted, so a replacement had to be made. FIRST,they had to wait for a beautiful piece of doug fir to show up to the millbefore it could be planed and sent to them.Then, the routed recesses had to be made. I offered to do it as their primarywoodworker was not available.As a picture is worth 10 thousand words, here it is. A very simple jig that Iwill duplicate for the Piet wing spar when I get my spar material.In this picture, the jig is upside down for a photo op only. It shows both a finishedrouted recess and how the spar is indexed in the jig. The width of the routed recess is "set". However, the length of the recess isadjustable. If you need one longer than the jig, then you simply rout and thenreset. If you need one shorter, I made adjustable end stops with a gage tomake setup easier.The jig, end stop and spar all get clamped as a whole directly to the bench top.It's a very stable setup. Here's the setup for a short recess (at the endof the spar).I'll be getting my wood from McCormick in Madison. I don't know if this is generallyconsidered a difficult process for much of the group. If it is, or iscondsidered worthwhile, I can rout my spars at Brodhead next summer. If not,I'll probably do it here but wouldn't mind bringing the jig I make to pass alongto the next guy, or we could do a bunch of spars there, whatever works forthe group.ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
I recently did a project for the EAA on their 1919 Standard J-1 biplane restoration.One wing spar was BADLY dry rotted, so a replacement had to be made. FIRST,they had to wait for a beautiful piece of doug fir to show up to the millbefore it could be planed and sent to them.Then, the routed recesses had to be made. I offered to do it as their primarywoodworker was not available.As a picture is worth 10 thousand words, here it is. A very simple jig that Iwill duplicate for the Piet wing spar when I get my spar material.In this picture, the jig is upside down for a photo op only. It shows both a finishedrouted recess and how the spar is indexed in the jig. The width of the routed recess is "set". However, the length of the recess isadjustable. If you need one longer than the jig, then you simply rout and thenreset. If you need one shorter, I made adjustable end stops with a gage tomake setup easier.The jig, end stop and spar all get clamped as a whole directly to the bench top.It's a very stable setup. Here's the setup for a short recess (at the endof the spar).I'll be getting my wood from McCormick in Madison. I don't know if this is generallyconsidered a difficult process for much of the group. If it is, or iscondsidered worthwhile, I can rout my spars at Brodhead next summer. If not,I'll probably do it here but wouldn't mind bringing the jig I make to pass alongto the next guy, or we could do a bunch of spars there, whatever works forthe group.ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________