Original Posted By: "Greg Cardinal"
Hi Greg,Basically ending up with something VERY close to that sketch you sent me.The web is 9mm plywood (actually measures close to 5/16"). I ended up goingwith a little thicker than the design requires to avoid needing the verticalstiffeners at each rib (as is required for the smaller web materialthickness). I'm just glad I didn't use the 1/2" stuff I originally plannedon using! Also glad to just get started on the thing. I vacillated betweenso many different sizes....but I like what I ended up with.After putting all four thickener strips on to build out the tops and bottomsto 1" square, I weighed the "bare" spar. Comes out within half a pound ofwhat a 3/4" spruce one weighs (I used one of the spruce spars from thatMissouri Air Camper I was given....). Both come out around 8 lbs.This spar stuff has had me a little concerned about safety and designlimitations, but I'm very comfortable with what I'm ending up with. Thiswill be plenty strong and I won't worry about it when I fly.....Still have some sanding/cleaning up to do as can be seen from the attachedpics. Also need to trim off the ends (I built the spars with almost a footextra in length so I could trim/adjust as needed). Good thing too since thegrowth rings on one of the strips is a little wide for the first few inches.I'll cut it back to where the rings are a little closer.I'm anxious to get the wings done so I can get started on that propduplicator! I think that's going to be a fun project!later,jm----- Original Message -----