Serge - why not use a shorter bit and do it from each end?
----- Original Message ----- From: "Serge F. Vidal" <serge.vi...@ate-international.com> To: "'KRnet'" <kr...@mylist.net> Sent: Tuesday, February 24, 2004 7:08 AM Subject: KR>Help me use that veeery long drill bit! > I have an impressive drill bit in my office. Diameter is 8mm (that is > 0.32"), and length is... 2100 mm! (Yep, that is 82.7"!). Was made specially > for my KR2. Understand why? > > The idea is: I am preparing to get inspected by the French authorities. The > French law makes no provision for an imported homebuilt, so I had to > persuade them that there would be no difference with a new project. They > agreed to give it a try, provided I find a way to make my spars inspectable. > > So, the proposed solution, as suggested by our Austrian builder (Christan > Kogelmann), is to drill a hole along the spars, right in the middle of the > spar spacers, and inspect with a borescope. > > Now, for those who didn't follow the story, I am now living in Tunisia, and > my poor KR is in France. So, I will have to take that drill bit along with > me when I go there. What is the airline going to say about that, I wonder... > > Anyway, the critical thing is to drill those holes very straight, especially > in the aft spar. > > My intentions are: > 1 - Make two wooden drill jigs (wood blocks with a hole through them), one > for the front spar and one for the aft spar, matching the spars side > section; > 2 - With wings removed, clamp the jig between the WAFs > 3 - Starting with a short drill bit, slowly drill through the first spacers; > 4 - Take the long drill bit, then finish the job. > > Since I cannot see the aircraft, I checked the construction manual to find > the dimensions of the spars side section. When I add the spars dimensions > and the plywood, What I get is: > > OUTER WING FWD > Caps Ply Total > H 7.28" (184.9mm) > W 2.031" (51.6mm) > > OUTER WING AFT > > H 4.03" (102.5mm) > W 1.03" (26.2mm) > > Could somebody check these dimensions for me? > > > > > Serge Vidal > KR2 ZS-WEC > Tunis, Tunisia > E-mail: serge.vi...@ate-international.com > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > >
