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Working on the Spars/Ribs tonight after work.
Been thinking about how strong the straight cardstock will be. Once the wing is complete, it should be able to support 30lbs or 6 times the projected weight of 5lb ready to fly.
Figure if it can support that weight it will be able to handle the flight loads it will encounter. Not enough to do aerobatics, but enough to do some tight turns if needed.
Decided to use some carbon fiber after all. Reason; it fits the exact location where stringers of cardstock go. The front stringers will still be cardstock.
Carbon fiber strips are .25" wide and .0196" thick. Flexible but strong if used vertically. That is how they will be used, two per wing near the CG location. (Center of gravity = CG)
Top and bottom of wing means they will act as a spar ; they will carry a major portion of the load. Decided to go a safer route just to be sure it is safe to fly.
The cardstock stringers are .25"x .036" thick (the cardstock is .009" thick per laminate x 4= .036") instead of 4-per side, now just two are being used.
Up until now was totally planning to use just cardstock. The balsa wood being used is for alignment purposes in the leading edge, the trailing edge also for alignment but main reason= solid mounting surface for the Elevons.
Mike
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