DIFFERENT IDEA WHEN UPGRADING TO 4 CHUFFS

Alex MOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Hello everyone,

I'm not sure if anyone has done this before, I will share this with you anyway. In the past when upgrading an engine from two chuffs to four, I would normally install two magnet's on either the tender wheels or the trailing truck wheels, I've also installed them on the back of the drive wheels, but I would have to file the magnet's down, So they wouldn't hit the chassis.

Now what I do as you will see in the photo's below is, install four magnet's on the drive wheel at 12, 3, 6, and 9 O'clock. The only difference is I install the magnet's on there side just below the drive wheel flange, they fit perfect and they don't protrude out

at all. I find this to be a much better way of do this for two reason's, first is i don't have to go crazy and try to make the magnet's stand up between the drive wheel spokes. Second is I don't have to worry about the magnet's getting knocked off if the were installed on the back face of the drive wheel. I'm doing it this way for a while now with perfect results.

Thanks for looking,

Alex

MAGNET

MAGNET INSTALLED ON IT'S SIDE AT THE 12 O'CLOCK POSITION

MAGNET'S QUARTER SPACED

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6/11/146:48 PM

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Bob SeverinOGR Forum Member

Alex:

I presume this would be used in conjunction with a new board, something akin to what Gunrunnerjohn has developed? Could this be done to the Williams Hudson you modified for me?

6/11/146:58 PM

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Alex MOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Originally Posted by Bob Severin:

Alex:

I presume this would be used in conjunction with a new board, something akin to what Gunrunnerjohn has developed? Could this be done to the Williams Hudson you modified for me?

Hi Bob,

It could be done if your drive wheels are the same as in my photo's above.

Thanks,

Alex

6/11/147:02 PM

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Former Member

Very innovative, Alex.

6/11/147:08 PM

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gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I like it Alex, a nice neat installation. It also is in perfect sync!

6/11/147:13 PM

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D500OGR Forum Member

Bob Severin -

No new board is required, as the existing magnetic reed switch just opens/closes as a magnet goes by it, causing the existing board to react and chuff.

I'm sure that they have a real-life off/on reaction limit, but if

you put 8 magnets, you would get 8 chuffs, and so on.

6/11/147:23 PM

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gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

The typical open or close time for magnetic reed switches is on the order of a couple of milliseconds. Think of how fast the wheels would have to be going to exceed that!

If the wheel went around 20 times a second, and the diameter is 1.25", you'd go over six feet in a second, pretty fast for our little trains! However, with four magnets, the chuff switch closures would still be 12.5MS, sufficient for all but the slowest of reed switches.

I picked a random datasheet...

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6/11/147:45 PM

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markerOGR Forum Member

Nice idea, it solves the clearance problem that prevented me installing the magnets on the back of a drive wheel. It's been at least 8 years, now I have to try and and figure out which engine and check the drivers.

Thanks Alex, that's a good one!

6/11/147:56 PM

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