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A new twist with magnets

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A new twist with magnets

Postby Art Broder » Mon Oct 06, 2008 4:46 pm

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[img][img]http://img.photobucket.com/albums/v313/artbroder/Subron4%20%207-19-08/magnetsonpushrods005.jpg[/img]
I recently changed to use of magnets to simplify connection of bowplane linkage automaticaly as I attached upper and lower hull halves together. I not only don't need to fiddle with tools after the hull halves are assembled, I also get smooth bowplane operation by attaching the magnet to the pushrod with a rubber tube. The slightly flexible rubber bends as the the bowplanes rotate.
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Postby raalst » Wed Oct 08, 2008 3:13 am

Nice !

did you try some extreme maneuvering ? there might be quite a force on those planes
sometimes, I guess you need a magnet of a certain strength.

Btw : NEVER file/sand/mutilate neodynium magnets. under the coating of those magnets there is some serious poison, or so I was told. The coating should stay intact.
How did you attach the magnet on the plane ? glue ?
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Postby Bob the Builder » Wed Oct 08, 2008 6:50 am

Hey, guys!

I'm certain that Merriman has been using magnets like this for some time now with all of his SubDriver kits through Caswell. I just finished trimming out a gentleman's Gato sub that featured these, and now that I've seen and worked with them in person, I'm NEVER going back to conventional linkages.

The bond is very strong, even for the smaller magnets, and getting the WTC in and out is turned into a very fast process.

I've actually ordered a hundred of the 1/4" disc magnets for future projects. I used magnets to connect the upper dive linkages to my Seawolf, and they worked great!

I highly recommend their use to anyone thinking about it.

Now, if I can just get a while to work out how to use these things through a WTC shell, we wouldn't need linkage seals!

Hmmmm....


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Postby Bob the Builder » Wed Oct 08, 2008 6:50 pm

I just got an email from Dave. Apparently he got the idea from Brian Stark. There ya go!


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Postby Art Broder » Wed Oct 08, 2008 8:38 pm

I just used a slight variation from Brian Stark's magnet idea, and the Klik-ons developed by Dave Merriman. In my sub, the attachment of the magnet to the pushrod is with a rubber hose. I used CA cement to secure the magnet to the rubber and the pushrod.
Ronald, I cemented the magnet into a hole in the aluminum arm on the rod connecting the two bow planes with CA, also.
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Postby Rogue Sub » Thu Oct 09, 2008 8:05 pm

could even ca a steel screw in the control arm to save on the magnet. If your cheap like me!
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Postby Pirate » Sat Oct 11, 2008 1:18 pm

But how will you keep it clean and tidy with all that rust that is sure to follow. Some things are worth the added expense.
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Postby fgroza » Sat Oct 11, 2008 9:32 pm

Just a heads up, ca is NOT waterproof! It will let go if unpainted. Talked to Bob Smith about this subject. Goop or JB weld, or slow setting, not 5 min, epoxy will work. 5 min epoxy is NOT waterproof. Locktite makes a waterproof epoxy that will setup in water. Great stuff! Found it at Lowes in a syringe type applicator. It dries a grey color and is very hard when cured.
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Postby kazzer » Sat Oct 11, 2008 9:32 pm

Pirate wrote:But how will you keep it clean and tidy with all that rust that is sure to follow. Some things are worth the added expense.


You could brush plate the screw with nickel.

see http://www.caswellplating.com/movies/PNP-SVideo.mov

I've used those little balls that connect to a push rod cup
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Art Broder wrote: I recently changed to use of magnets to simplify connection of bowplane linkage automaticaly as I attached upper and lower hull halves together. I not only don't need to fiddle with tools after the hull halves are assembled, I also get smooth bowplane operation by attaching the magnet to the pushrod with a rubber tube. The slightly flexible rubber bends as the the bowplanes rotate.
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Neat idea Art. Heat shrink tubing could also fix a magnet to a push-rod, but I really like the addition of the Dumas Threaded Couplers, as they allow you to adjust the push-rod length quite easily. That's why Merriman's Klik-ons are so popular.

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Postby expfcwintergreen » Sun Oct 12, 2008 9:02 am

I set mine in a little bit of Super-Sculpy that is drilled/tapped to thread on to the pushrod for adjustability. A drop of West Systems on the magnet gives a little more security.

Works great and is very inexpensive.

Magnet to magnet works best, although some of these are powerful enough to work with stainless, so no plating required.
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