Joe; I'm also doing my wings and have a similar problem. The panels scallop when sanded. bothe the main panel and the leading edge. I also did what ur doing. Cut 1" x1" strips of foam and glued them to the spars between the ribs and will glue the 1" panel to the ribs and the supports. The problem is that when you press on the sanding board the panel depresses and is level but it pops back up as soon as you take the sanding board off. The other solution is to build them the way Mark langford does. ie shape the inside of the panel then fiberglass it, then put the panel in place and sand the top side. see Marks web site. ps. my sanding board is a 7' length of rectangular plastic drain pipe covered with the sandpaper that comes in a roll. works fine. Let me know how you make out. W.G.(Bill) KIRKLAND wkirkl...@rogers.com ----- Original Message ----- From: "Joseph H Horton" <joe.kr2s.buil...@juno.com> To: <kr...@mylist.net> Sent: Thursday, September 04, 2003 9:18 PM Subject: Re: KR>Cowling- and foam problem
> I have a KR-2S cowl from Rand - Robinson that I will probaly offer up for > sale in the next couple months. I'm in the process > of pulling a mold off it to make one out of carbon fiber. The fit and > finish is OK but I felt the weight was not acceptable with the corvair > under the hood. Yes it does fit around a corvair with plenty of room. > I'm having a little trouble shaping my wing foam. I followed the > instructions by installing 1" foam over 2" ribs in the sections between > spars. I had both wings sanded down to finial shape and came back the > next day and the foam panels between the ribs had bowed up. I sanded to > shape again which thins the foam panel down. Came back again the next day > with humps in the panels. I'm at the point now that I don't want to thin > the foam any more so I added bulk peices of foam scraps to the under side > insde the wing to stiffen the panels before I sand them again hoping that > it stabilizes the foam panels. I don't have the problem in the leading > edge panels or the trailing ege panel, but they are thicker- more like 1 > 1/2" to 2" thick. The other factor that may be at work is the hanger is > not insulated and drops to the upper 60's at night and some days into the > 90's. > Anyone else ever have anything like this happen to them? Or any > thoughts? > I can hardly wait to learn the sanding song. Would it sound ok with banjo > backup cause I cann't play the guitar? > Looking forward to meeting everyone in 6 days. > Thanks -- Joe Horton > > On Sun, 31 Aug 2003 16:42:55 EDT goreebeth...@aol.com writes: > > I do not personally know about a new engine cowling from R.R. I am > > thinking > > about buying one for my KR2S. I do have a cowling for a KR2. It > > has an air > > inlet at the bottom center location. I did split it top and bottom > > to widen it > > to make a cowling for my KR2S. It could be fiberglassed to > > reattach. If I > > can't find a new or used cowling, I will make you a good deal on the > > one that I > > have. Ray Goree ( goreebeth...@aol.com) > > _______________________________________________ > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html
