Which comes first.... - Zenith Aircraft Builders and Flyers2024-03-29T11:51:25Zhttps://zenith.aero/forum/topics/which-comes-first?feed=yes&xn_auth=noThanks gentlemen for your inp…tag:zenith.aero,2017-09-28:2606393:Comment:5898792017-09-28T11:04:27.442ZJason Rhttps://zenith.aero/profile/JasonR
<p>Thanks gentlemen for your input.</p>
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<p>Time to dust of the router bit box :)</p>
<p>Thanks gentlemen for your input.</p>
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<p>Time to dust of the router bit box :)</p> Router then sand the angle. …tag:zenith.aero,2017-09-27:2606393:Comment:5897772017-09-27T20:05:10.068ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p>Router then sand the angle. Dan's right regarding the shaping problem if you do it in the other order.</p>
<p>Don't ask me why I know.</p>
<p>Router then sand the angle. Dan's right regarding the shaping problem if you do it in the other order.</p>
<p>Don't ask me why I know.</p> I would do the roundover befo…tag:zenith.aero,2017-09-26:2606393:Comment:5895182017-09-26T22:57:53.185ZDan Hillhttps://zenith.aero/profile/DanHill
<p>I would do the roundover before you sand the angle then sand the angle to meet the bottom of the roundover. if you sand the angle first the router bearing will ride farther in because of the angle causing your form block to be undersized. you will then also have to further blend the roundover to meet your springback angle making it more undersized. Dan.</p>
<p>I would do the roundover before you sand the angle then sand the angle to meet the bottom of the roundover. if you sand the angle first the router bearing will ride farther in because of the angle causing your form block to be undersized. you will then also have to further blend the roundover to meet your springback angle making it more undersized. Dan.</p> So far I have only made forms…tag:zenith.aero,2017-09-26:2606393:Comment:5895982017-09-26T22:54:00.594ZGreg Duncanhttps://zenith.aero/profile/GregDuncan
<p>So far I have only made forms for two rudder ribs. I used 3/4" MDF and rounded the edges first with a router and then relieved the "spring back" angles with a sander. Worked well that way for me.</p>
<p>Not sure about the plywood but with MDF you can apply super glue to the tighter bend areas of the forms that will harden it up enough to resist deforming under more rigorous hammering.</p>
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<p>Greg</p>
<p>So far I have only made forms for two rudder ribs. I used 3/4" MDF and rounded the edges first with a router and then relieved the "spring back" angles with a sander. Worked well that way for me.</p>
<p>Not sure about the plywood but with MDF you can apply super glue to the tighter bend areas of the forms that will harden it up enough to resist deforming under more rigorous hammering.</p>
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<p>Greg</p>