---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Mon 02/15/10: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:56 AM - Subject: W-818 Pushrod Assembly (David Stuebner) 2. 10:04 AM - RV-7 F-7114 L and R fit (David Stuebner) 3. 09:52 PM - Re: RV-7 F-7114 L and R fit (Joseph F. Giallo, II) ________________________________ Message 1 _____________________________________ Time: 07:56:29 AM PST US From: "David Stuebner" Subject: Subject: RV7-List: W-818 Pushrod Assembly Tom, I wouldn't be a conservative as the others. The plans call out the option for welding, so it is an acceptable method of joining he pieces. I would expect that if you told a competent welder what the materials are he/she would pick an appropriate filler material and weld prep procedure. The bead doesn't have to be flush, so he/she may not even bevel the egdes. As for the existing holes, I definitly wouldn't worry about the hole in the end fitting. It's designed to have holes in it. And I wouldn't worry about two 1/8" holes in the tubing, except one of the goals is to seal the tube up as best as possible. So, I would rotate the fitting 90degrees and have the welder fill in the tubing holes. The one drawback to welding is it burns the primer off the inside. Trade-offs. And yes, a quick call or email to Van's to confirm won't hurt. Dave ________________________________ Message 2 _____________________________________ Time: 10:04:18 AM PST US From: "David Stuebner" Subject: RV7-List: RV-7 F-7114 L and R fit Anyone building a -7 have problems with the spar bolt hole locations in the F-7114 gussets? I am having trouble getting bolts to go through the center section and then through the gusset holes. I know the bolts are close tolerance, but.... I can rationalize that the close tolerance is needed for the heavy spar end and the heavy components of the center section. Do you think I can open up the holes in the gussets a bit? Dave ________________________________ Message 3 _____________________________________ Time: 09:52:06 PM PST US From: "Joseph F. Giallo, II" Subject: Re: RV7-List: RV-7 F-7114 L and R fit Dave, This is a known problem - fortunately solvable. Van's will tell you that the affected components are match drilled, unfortunately the assembly is what counts and mis-alignments creep in to their assembly processes. I had special endmills made that fit inside the holes (both sizes) and would only cut on the end rather than the sides - thus clearing the interference without damaging the precision holes. If your misalignment is slight it may be possible to clear using a machinists scraper in a careful way. If you can't make this work send me your address off-list and I'll send you the endmills. Make sure to check both sides of the fuse spar as well as the wing inserts - I found issues in both (yes it is a quickbuild). The most difficult part of the repair was aligning the spar holes once the interference was cleared - I had some expert help from Van's east coast representative to unrivet the forward portion of the spar within the fuse, the wings were then plugged in and pseudo-precision pins (also available if you need them) inserted to align the parts. The spar was then re-riveted to hold the (now correct) alignment. Hope this last step isn't necessary in your case but I mention it as it does happen (mine is not the only case.....) Regards, Joe N813MJ 80hrs David Stuebner wrote: > > > Anyone building a -7 have problems with the spar bolt hole locations > in the F-7114 gussets? I am having trouble getting bolts to go > through the center section and then through the gusset holes. I know > the bolts are close tolerance, but.... I can rationalize that the > close tolerance is needed for the heavy spar end and the heavy > components of the center section. Do you think I can open up the holes > in the gussets a bit? > Dave > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv7-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV7-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv7-list Browse Digests http://www.matronics.com/digest/rv7-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.