Gavin, I basically built my center wing stub with the dihedral starting at the center line inside the fuselage. Both for front and rear spars. Did this by calculating correct dihedral to get to wing tips, assuming the outer wings would just be an extension of the dihedral. Construction of center wing stubs was accomplished on the bench, by using 1/4" laminations, glued together and clamped while glue cured. Built them up the same dimensions called for in the plans, both top and bottom of the spars. Then once the spacers in between had been installed, drilled holes for allowing air pressure to be equalized along the center wing stub, before applying a finish coat to protect the interior. Then covered the front and back of the spars with the required plywood. Should be strong, still light in weight and the outer wings can be mounted on the WAFs without worrying about that break in the center stub versus the outer wings. Of course you still have to deal with the horizontal angle change called for on the rear wing stubs versus the outer wing panels. Hope this helps you think through how you might proceed.
Steve Robinson On Sun, 14 Sep 2003 19:01:47 +1000 Gavin Donohoe <gavinandlou...@bigpond.com> writes: > I've been reading on Marks site about the new airfoils and have > decided to go with the 5048/6 option !! I also like the idea of > starting the wing dihedral inboard of the first rib. Has anybody > done this yet and how was it done ?? I have lots of timber but not > the right thickness, Is it stronger to laminate the spar centre > sections from maybe 1" planks and bend them on the bench before the > glue is set ??Maybe 1" is too thick to laminate maybe I need thinner > pieces but more of them?? Can someone with experience help to answer > some of these questions?? I want my spar to be as strong as I can > get it!! > > > Gav > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.518 / Virus Database: 316 - Release Date: 11/09/2003 > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > >
