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Reply to "3D Chuff Cam for my J1a (and S1 Duplex 3-29)"

If you do that, please post a video of it in action.  I've been considering the same thing for mine.

Speaking of single chuffs, my TMCC Ten Wheeler from 2003 only has 1/rec because it is actuated by a bar on just one of the cylinder rods.  Sounds pretty terrible.  This thread has given me some inspiration to see if I can kick it up to at least 2/rev.

My guess there is no place for a cam in the engine unless you mill one out. You could do what RonH has done with a two lobe cam on the tender axle, use magnets and reed switch on a tender axle, or John’s chuff generator on the motor.

You will still only get one puff out of the smoke unit unless you install a new fan smoke unit.

Pete

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