[Paddlewise] Tube Strength

To our Engineers;


    I am changing the outfitting, on my tandem canoe, from three thwarts to
four. For weight and ease of purchase.  I plan on using a smaller diameter
tubing.  From experience on my solo boats, I feel comfortable in my choice of
tubing, but would feel better with some more objective evaluation.  Therefore,
would one of our engineers be good enough to point to where I can find the
information to answer the following question.





    What is the comparative strengths of these tubes, both of which are
tempered aluminum.


    1. One is 7/8" OD with a .065" wall thickness.  This is round.


    2. The second is 1.5" OD with a .05" wall thickness. This was round, but
was somewhat flattened to make an oval.


    


    Your guidance and consideration will be appreciated.





JKL





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