Larry here is a picture of my spar caps and the 2 foot pieces scarfied on. 1 foot for the 2s 1 foot extended
With the scarfs running in opposite directions and the spruce ply web covering both sides I think this will be plenty strong. The original use foam and a couple of layer of glass. As for the center section spars, along with the AS5048 airfoil being much thicker when I made up my spar caps the wood I used was 1/4 thicker than called for in the plans (2" top and bottom) mine is 2.25" instead of sawing it off I incorporated into the spar for strength (and a little extra weight) and then shortened the vertical pieces to maintain the 8.19" over all spar height. I think it would hold up a tank or at least a Microbus! Gary ----- Original Message ----- > >> This is >>a KR 1.5 Ss with a 28' span. > > ++++++++++++++++++++++++++++++++++++++++ > > Gary, > > The 28 foot wing span on your project caught my eye. > Larry Flesner > -------------- next part -------------- A non-text attachment was scrubbed... Name: SPARS.jpg Type: image/jpeg Size: 112493 bytes Desc: not available URL: <http://list.krnet.org/mailman/private/krnet_list.krnet.org/attachments/20140416/f5324b68/attachment.jpg>
