Serge, I have done exactly as you are thinking of doing in the front main center spar. Make sure you only drill in the web and not any caps or vertical members. I drilled two holes each 3/4" diameter using a unibit which makes very nice smooth cuts. A rubber grommet was then inserted in the holes. One is for wiring, tubing and the other is for fuel line. You should be able to go under the rear spar so no drilling is required there. I have 26.6 flight hours and am in no way worried about the holes I installed. This is my opinion only, replicate at your own risk!!!! You could re-enforce the holes by laminating another sheet of ply thus having double thickness in the hole area but I did not feel this was necessary.
Mark Jones (N886MJ) Wales, WI Visit my web site: http://mywebpage.netscape.com/n886mj Email: flyk...@wi.rr.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of phil brookman Sent: Tuesday, July 05, 2005 11:23 AM To: KRnet Subject: Re: KR> Holes through spars find another route serge try not to drill spars at all p ----- Original Message ----- From: "Serge VIDAL" <serge.vi...@sagem.com> To: <kr...@mylist.net> Sent: Tuesday, July 05, 2005 5:09 PM Subject: KR> Holes through spars > I think of drilling holes through the hollow part of the fore and aft > spars, inside the cockpit, in order to route the various wires, and the > Pitot-Static tubing. At present, they go around the spars. > - Has anybody done that? > - How big can I make the holes? > - Do I need to reinforce the plywood where the holes are? > - What could I use to plug the holes, to prevent chafing? (I was thinking > of using plastic (PVC) tubing) > > Serge Vidal > KR2 "Kilimanjaro Cloud" > Paris, France > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.323 / Virus Database: 267.8.8/37 - Release Date: 01/07/2005 > > -- I am using the free version of SPAMfighter for private users. It has removed 21808 spam emails to date. Paying users do not have this message in their emails. Try www.SPAMfighter.com for free now! -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.8.8/37 - Release Date: 01/07/2005 _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
