From: "Nat Puffer" Subject: Re: COZY: Ch 9, gear side interference Date: Wed, 3 Jan 2001 12:46:59 -0600 Dear Dana, If the fuselage sides are built per plans, and the landing gear bulkheads are built according to plans, and the landing gear tabs are built per plans, there should be no interference between the fuselage sides and the strut. There should be a little clearance between the strut and the lower longeron. I don't remember exactly, but would guess about 1/4 inch. No one else has had an interference. Before you start cutting away anything, you'd better call me on (480)981-6401. Regards, Nat -------- > From: Dana Hill > To: cozy_builder@canard.com > Cc: cozy_builders@canard.com > Subject: COZY: Ch 9, gear side interference > Date: Wednesday, January 03, 2001 12:43 PM > > Hi Group, > Although I have already sent this question out to a couple individual > builders, I thought I would also send it out to the group. > When lowering the main landing gr into the fuselage for the 1st time, I > discovered that I had interference with the sides (the tabs were about an > inch short of the holes in the bulkheads). It seems like I'm going to have > to chop a lot of glass/foam material (maybe an inch or so) out. Have most > builders had to do this? It would be really nice to know the approx. > distance from the top surface of the longeron to the surface of a correctly > installed gear strut. Could someone please measure this and let me know. I > will then have a good idea of how much to remove. > Thanks much, > Dana Hill > #676 > ch 9 > PS kind of amazed that this doesn't seem to be in the archives. > > From: "ZEITLIN,MARC (A-Andover,ex1)" Subject: COZY: Ch 9, gear side interference (and admin info) Date: Wed, 3 Jan 2001 16:10:26 -0500 Nat Puffer wrote: > If the fuselage sides are built per plans, and the landing gear > bulkheads are built according to plans, and the landing gear tabs > are built per plans, there should be no interference between the > fuselage sides and the strut. In theory this may be true, but there's a lot of freedom in the shape of the fuselage sides as they're being carved and shaped. In actuality, with the steep angles of shaping, there may be a large difference in the position of the lower edge of the cutout. > .... There should be a little clearance between the strut and the > lower longeron. I don't remember exactly, but would guess about 1/4 > inch. Sounds about right. > .... No one else has had an interference. Ummmm, not quite - I did. Originally, upon strut assembly, I had to carve away about 1/2" of foam/glass, and still need to carve away about 1/8" - 1/4" in a couple of spots. As I started adding weight (engine, strakes, wings), the space I had disappeared. So, while most people may not have an issue, I wouldn't say it's "nobody". I've verified all the positions of all the bulkheads, sides, tabs, etc., so it's got to be a carving/tolerance issue. It's really not a big deal - zap with the dremel tool for 2 minutes and you're done. P.S. - the mailing list is completely screwed up at the moment - we're running on a year old member list due to a hardware failure at the "canard.com" site. I'll get it fixed tonight when I get home, but anyone who has sent a message within the past week may want to consider resending it tomorrow to reach the widest audience (and for those of you who are no longer on the list but are receiving messages or are getting them at the wrong address, this will be fixed tonight as well). -- Marc J. Zeitlin marc_zeitlin@alum.mit.edu | http://cozy.canard.com Non Impediti Ratione Cogitantonis (C&C) From: marc_zeitlin@agilent.com Subject: RE: COZY: Ch 9, gear side interference Date: Wed, 3 Jan 2001 14:50:02 -0700 Nat; > I am not sure what "foam and glass" you had to carve away. Are you > talking about the foam and glass over the triangular pieces shown > Chap 7, page 1, Figure 4? and also dotted in on M-9? I thought he > was talking about cutting away 1 inch of the lower longerons. I don't have the plans here in front of me at work, but I believe I'm talking about the foam and glass BELOW the lower longeron, where the triangular plywood pieces are used to help shape the area. After glassing around there, I needed to carve away some of the glass and foam (and a tiny bit of the triangles), but none of the lower longeron - I agree completely that if there's any need to carve the longeron, than something is dreadfully wrong. -- Marc J. Zeitlin marc_zeitlin@alum.mit.edu | http://cozy.canard.com Non Impediti Ratione Cogitantonis (C&C) From: dhill36@juno.com Date: Wed, 3 Jan 2001 22:41:37 -0500 Subject: Re: COZY: Ch 9, gear side interference On Wed, 3 Jan 2001 20:50:05 EST Militch@aol.com writes: > I just did a test fit of mine the other day and ground away happily > with my belt sander till it all fit. I found that I ended up grinding down > till I just encountered the birch plywood reinforcement that I remember > (vaguely) installing in there way back when. As usual, looks like the plans > are pretty close. > Regards, > Peter Militch Cozy Mark IV #740 Peter.....thanks!, that is just what I wanted to hear. When I glassed this area (when glassing the sides) I should have conformed the glass as tightly as possible to the birch triangular pieces. This would have probably allowed clearance. Maybe we should emphasize this point in the FAQ for ch 9. Thanks for the help Group, Dana Hill CZ #676 ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj.