Nexus wind transducer repair needed - Page 2 - SailNet Community

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  #11  
Old 04-03-2012
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Re: nexus single fin repair

I saw your thread on repairing Nexus single fin wind transducers. I have one that dates back to around 1990. It stopped working and I took it down and found that it need lubrication so it would rotate properly and then noticed the fin is missing. The fin is attached to a black conical cap with 4 small screws at the back of the transducer. Do you have any replacement caps or know where I can get one? If not, do you have any ideas about fabricating a fin and what would be the best way to attach it...glue?
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  #12  
Old 09-29-2012
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Re: Nexus wind transducer repair needed

An update on my nexus wind transducer. I finally got up the mast to retrieve the anemometer and vane assembly (a month ago or so). I then disassembled it. Lubing the ball bearing races freed up both the speed and direction axes. I used a thin layer of silicone seal in place of the gaskets/sealer that was there. Last week I re-installed it and it works like new.

Aside: I found this is an extremely well designed unit. The mast attachment mechanism is very good -- both completely secure and easily undone. The wind propeller spins a plastic marble that is half white and half black. An LED & photosensor pair picks up the rotation rate without touching the spinning shaft anywhere.

For Ghoster: Fabricating an epoxy fibreglass fin should be finicky but relatively simple. Keep it light! On mine the black cap and fin is one unit attached by four screws. I would fabricate an epoxy glass fin and cap in one so there is no glueing. Put some carbon black or other pigment in the epoxy for UV protection and silica powder for strength. Good luck!
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