Serge, good luck. As I said I tried this with the spar web blocks already drilled and on the workbench with airline equipment. Your plan sounds good, I would be very careful and check the drilling progress after each spar web block is drilled through. Our companies longest 6mm borescope probe is 2,7 m long and is flexible with a 90° viewing angle, that worked for me. Sorry but I do not have the plans at work and my airplane is also about 2 hours drive from were I live.
I know there are certain spar inspections on the Shorts Skyvan using a borescope so that was approved by some authority already..... Take care Christian OE-VPD http://www.members.aon.at/oevpd -----Original Message----- From: Serge F. Vidal [mailto:[email protected]] Sent: Dienstag, 24. Februar 2004 14:09 To: 'KRnet' 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: [email protected] _______________________________________ to UNsubscribe from KRnet, send a message to [email protected] please see other KRnet info at http://www.krnet.org/info.html _______________________________________ to UNsubscribe from KRnet, send a message to [email protected] please see other KRnet info at http://www.krnet.org/info.html
