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  1. M

    Making a tapered aluminum tube

    I believe you are planning to use this mast SELF SUPPORTING, with no guy wires (I don't know the nautical term) to support it. In that case your tube diameters are too small to support the loads. Keep in mind also that aluminum is 3x more flexible than steel. If you are determined to use...
  2. M

    Making a tapered aluminum tube

    I worked in the industry of making round, tapered aluminum tubes for lighting, flag poles, etc. The size of tube you desire is considerably smaller than this industry makes (the smallest diameter I've seen is 60mm and in 18' that would start with a tube between 100 and 130mm diameter that is...