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Hello Everybody
I've been wondering about the wing's main spar. Obviously with the vertical grain balsa webbing and the hardwood spars, the main spar is very strong. My only concern is that the spar is not continuous. It is interruped by the foam rib. I'm wondering if this is something to be concerned about? Perhaps because of the length of the rib, its not a weakness at all. Any thoughts? Obviously building a wing with a continuous front and rear spar would greatly complicate the building process and perhaps would not buy you anthing.
Thanks again for the detailed pictures and construction techniques.
Randy |
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Hi Randy, good question. I can relate to you the strength of the spar, done this way, only in practical application. When one can do a tight 180 degree turn, a pylon turn if you will, with the engine wide open, and an airspeed of 132 mph, and do this many times in a 28 year period with 34% and 40% Lasers, I feel that the gap in the compression webs is of no concern. I for one would not try this with a foam wing.
Regards
Jack