Upside down wood and aluminium mast.

  • 15 Sep 2026 13:50
    Reply # 13696219 on 13692691
    Anonymous member (Administrator)

    Roger,
    I suggest you read Chapter 6b of TCPJR about the hybrid aluminium-wooden mast. The reason for having the aluminium tube in the lower end, is that aluminium is so much stronger for a given diameter.

    Arne

    PS:
    You find chapter 6b either up to the left on this page,

    https://www.junkrigassociation.org/arne

    or directly here:  this page:


    Last modified: 15 Sep 2026 20:43 | Anonymous member (Administrator)
  • 13 Sep 2026 10:57
    Message # 13692691

    Hi all,

    All the posts I see about wooden/alu masts have the lower part as a parallel alu pole and a tapered wooden topmast.

    Just out of interest, what would be the advantages/drawbacks of making a mast with a tapered aluminium light pole as the top part of the mast and a parallel wooden part at the bottom?

    If you wanted, say, a 14m mast. The longest aluminium light poles are around 10-12m. Let's say 10m alu - so 4m wood needed to protrude - how much inserted into the alu? Maybe 1m? So 5m wood, parallel, 1m insterface, then 10m pole on top.

    The most immediate advantage I can see is that the join is easily visible from deck and the (presumably) heavier wooden section is lower down. The foot of the mast could have an alu "shoe" epoxied onto the bottom to avoid potential rot in the bilges.

    What do people think?

    Cheers,

    Roger.