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  • Nope, doubt it will ever be an issue. Once everything is bolted together for routing, friction will hold it all together nicely.

    Yep, no need to drill the corners when routing. The corner will be naturally round.
    Christopher Owens
    Bearhawk 4-Place Scratch Built, Plans 991
    Bearhawk Patrol Scratch Built, Plans P313
    Germantown, Wisconsin, USA

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    • Well I ko'd the router


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      • Not cutting them by hand. So I guess it's on hold now.





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        • I went through one myself.
          Christopher Owens
          Bearhawk 4-Place Scratch Built, Plans 991
          Bearhawk Patrol Scratch Built, Plans P313
          Germantown, Wisconsin, USA

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          • Went out and bought a new 2hp router from harbor freight. It can hold bit sizes up 1/4" - 1/2"


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            • Bushings...I inserted bushing into my form blocks and made them from a $5 piece of generic steel brake line. I think I used 3/16" jig pins to hold the form blocks and the rib blanks together. I cut my 2.5" long 3/16" DIA jig pins from a long piece of steel rod I got at the hardware store. The Brake line fit the jig pin nicely. I think the brake line was 1/4" Ouside Diameter. I would insert the bushing again into my form blocks, but I would want the bushings in place before I drilled the jig pin holes into my aluminum rib blanks.
              Brooks Cone
              Southeast Michigan
              Patrol #303, Kit build

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              • Originally posted by Bcone1381 View Post
                Bushings...I inserted bushing into my form blocks and made them from a $5 piece of generic steel brake line. I think I used 3/16" jig pins to hold the form blocks and the rib blanks together. I cut my 2.5" long 3/16" DIA jig pins from a long piece of steel rod I got at the hardware store. The Brake line fit the jig pin nicely. I think the brake line was 1/4" Ouside Diameter. I would insert the bushing again into my form blocks, but I would want the bushings in place before I drilled the jig pin holes into my aluminum rib blanks.
                Thinking outside the box. Good stuff

                I'm thinking about the jig pins in question. Did you have your forms pinned together before routing? Seems like you'd want to squish them together to hold them firmly together. I used 3/16" screws with washers and wing nuts.
                Christopher Owens
                Bearhawk 4-Place Scratch Built, Plans 991
                Bearhawk Patrol Scratch Built, Plans P313
                Germantown, Wisconsin, USA

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                • Bcone1381
                  Bcone1381 commented
                  Editing a comment
                  Yes Chris, you are right, When routing I used 3/16" screws with the head countersunk below the surface of the MDF pattern instead of the pins. I think I had the steel inserts in place for piercing the rib blanks to prevent hole enlargement during the drilling action.

                • Chris In Milwaukee
                  Chris In Milwaukee commented
                  Editing a comment
                  Gotcha. Good idea. I tried a few things but didn't find anything that worked as a bushing. I just tried to be careful. Now I know for future projects :-)




              • That's the new router I bought. $48 at harbor freight...not bad.

                I will look for generic brake lines tomorrow provided the hardware store is open...1/4" outside diameter 3/16" inside diameter

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                • Ok new problem...looks like we can't mount that one upside down....


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                  • Your going to want a laminate bit, not that one. Laminate bits have a bearing on the end that will follow your pattern. You'll chew your pattern up with that bit.
                    Christopher Owens
                    Bearhawk 4-Place Scratch Built, Plans 991
                    Bearhawk Patrol Scratch Built, Plans P313
                    Germantown, Wisconsin, USA

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                    • I have a quarter inch laminate bit already. I was just showing what came with it. Is anyone else using this exact router? Were you able to mount it upside down?


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                      • Originally posted by MNBenny View Post
                        Ok new problem...looks like we can't mount that one upside down
                        You can route from the top, but it'll take some thinking to make sure everything stays put and doesn't move around while routing.
                        Christopher Owens
                        Bearhawk 4-Place Scratch Built, Plans 991
                        Bearhawk Patrol Scratch Built, Plans P313
                        Germantown, Wisconsin, USA

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                        • Originally posted by MNBenny View Post
                          I have a quarter inch laminate bit already. I was just showing what came with it
                          Ok, cool
                          Christopher Owens
                          Bearhawk 4-Place Scratch Built, Plans 991
                          Bearhawk Patrol Scratch Built, Plans P313
                          Germantown, Wisconsin, USA

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                          • Dad was just saying that very same thing. He's thinking of away to secure it all. I'm only going to do one at first to see how it works before stepping up to 3. Let me see..........to get a 1/2" router bit or not to get a 1/2" router bit.....that's the question


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                            • I just hope I don't have to remake these


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