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Windvane selfsteering gear questions

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  • 29 Mar 2017 11:16
    Quote
    Reply # 4697686 on 4691386
    Anonymous member
    Mark Mclauchlan wrote:

    Hi Peter

     The only successful way is to spark erode the grubs crews out. I would suggest asking local engineers if they can/or know someone who can

    Mark 

    Thanks for the suggestion Mark.  Having successfully removed the two small ones I've admitted defeat with the others, and handed the part over to an engineer to play with.

    Peter
  • 26 Mar 2017 22:50
    Quote
    Reply # 4691386 on 673518
    Deleted user

    Hi Peter

     The only successful way is to spark erode the grubs crews out. I would suggest asking local engineers if they can/or know someone who can

    Mark 
  • 26 Mar 2017 21:27
    Quote
    Reply # 4691318 on 4690275
    Anonymous member
    David Webb wrote:

    Hi Peter,

    I have never found a satisfactory way of removing seized bolts from aluminium. I just drill them out carefully and rethread for the next larger bolt size. Always use a no seize/isolating paste when putting it back together.

    David.

    David

    Many thanks for the reply.  I have a feeling that I'll end up drilling them out, but I'd rather not.  The pieces are somewhat unwieldy and I'm not confident of making a good job of it.  I've purchased a butane soldering iron, hoping to heat the grub screw without too much effect on the aluminium... we'll see.  

    Peter
  • 25 Mar 2017 22:42
    Quote
    Reply # 4690275 on 673518
    Anonymous member

    Hi Peter,

    I have never found a satisfactory way of removing seized bolts from aluminium. I just drill them out carefully and rethread for the next larger bolt size. Always use a no seize/isolating paste when putting it back together.

    David.
  • 25 Mar 2017 15:29
    Quote
    Reply # 4689635 on 673518
    Anonymous member

    Thanks for the response.  I've started to dismantle the gear to replace some perished rubber seals and a broken attachment.  Unfortunately 3 grub screws refuse to budge.   

    Any suggestions how to free them.  Is heat the answer or will it weaken the aluminium too much?

    Suggestions gratefully received

    Peter
  • 16 Mar 2017 21:32
    Quote
    Reply # 4672024 on 673518
    Anonymous member

    No, I haven't seen this one before, but I think the clue is in the way the vane support tube is offset to starboard. There must have been a pair of bevel gears, like the Aries, with a small bevel gear mounted on the horizontal shaft connected to the push-pull rod via a crank, and a larger bevel gear mounted on the vertical shaft that is connected to the servo blade.

    I'd guess that the vane would be similar to an Aries vane, too - a piece of thin plywood, something around  900mm high x 250mm wide.
  • 16 Mar 2017 21:08
    Quote
    Reply # 4671994 on 673518
    Anonymous member

    David

    I've put a couple of (poor) pics in my album  I think I've got an idea of how the two parts link.  I guess its via some gears and a pushrod.  As to the vane itself I'm not sure,  but I've yet to delve to the deepest recesses of the boat so who knows it might yet turn up!

    It seems the ladder is part of the whole outfit... possibly used as a unique selling point at the time.....

    Peter



    Last modified: 16 Mar 2017 21:16 | Anonymous member
  • 14 Mar 2017 20:01
    Quote
    Reply # 4666603 on 4666406
    Anonymous member
    Peter Scandling wrote:

    Rather than start a new thread I've highjacked this one.  I've just acquired  an Atlantic Windvane AW1 servo pendulum steering gear.  

    I don't know this one, and Googling it doesn't bring up anything. Can you post a picture or further info?
  • 14 Mar 2017 18:51
    Quote
    Reply # 4666406 on 673518
    Anonymous member

    Rather than start a new thread I've highjacked this one.  I've just acquired  an Atlantic Windvane AW1 servo pendulum steering gear.  

    It seems to be in reasonable condition.  I'm missing the actual vane.  Does anyone know how big this was on the original?

    There is also a question mark over how the vane connects to the pendulum anyone have experience they can share?

    Cheers

    Peter
  • 14 Nov 2012 01:50
    Quote
    Reply # 1136809 on 673518
    Anonymous member
    Hi! Our local maker lab, the vancouver hackspace, now has a laser cutter suitable for plywood, and there's online companies like ponoko.com that will deliver shaped plywood to a design. Both seem like a good alternative to messy (for me at least) work with a jigsaw trying to make the gears and hinges parts for Belcher's OGT design.  

    My question: has anyone already created CAD drawings for the Belcher OGT parts that they can to share?  


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