Hi Ed. . . Before bagging a wing, mark the intended location of the servo. Use a 1/8" router bit to cut a channel 3/8" to 1/2" deep, stopping at the inboard edge of where the servo well will be cut after bagging. Then use a 5/16" wide cutter to router centered over this to a depth of 3/32" and extend the cut about 1/2 way across the well location for the end of the capstrip to lay in. (see below) Since there is danger that epoxy under vacuum may get into the channel and block it, causing no end of misery, first wax up the long lead and press it into the channel, with a little loop back on each end to wire in to the servo and to wire to a connector where the lead exits inboard. Then cut a 5/16" x 3/32" strip of medium density balsa to cap over over the 1/8" channel. Fit the cap carefully at the ends so epoxy can't work its way into the channel and around the long lead under vacuum. This is to be epoxied in place. However, to avoid epoxy on the strip from bonding it to the lead, do this: Place some 1/8" wide masking tape or vinyl trim tape along the center of the cap. Smear epoxy overall on the cap and then pull off the tape. Now press the cap into the 5/16" wide cut. You do need to know where the skin is to be cut over the well, so make up a template from a clear page cover, etc., lay it in position relative to something on the wing that you can locate after bagging and mark the outline of the well cover. After bagging, position the template, push pinholes in at the corners of the well cover, cut the skin and router out the well, chipping away the part of the cap that you extended beyond the edge of the well. ---------- > From: Ed Berris <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED] > Subject: [RCSE] cutting wire channels in foam wings > Date: Tuesday, January 30, 2001 8:09 PM > > I'll be bagging some foam core wings. I'd be interested in hearing how you > cut the wire channel prior to bagging. If you cut them with a router, how > are you sealing the channel so that when you apply vacuum you are not > sucking your lay-up into the slot that you've cut? > > If you are using your how wire bow, do you cut a slot the full length of the > core even though your servo well will be closer to the root end than the > tip? If yes, do you just use spackle to fill the wire kerf? > > One of the guys that I fly with has built a clever drill guide for drilling > into the core from the root end. His idea is quite elegant and will do the > job but I'm looking for other ways to accomplish this task. > > Your techniques for this will be appreciated. I'd like to share your ideas > with my fellow club members. > > Thanks in advance for your ideas. > Ed > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
