[Steam-engine] Reverser lever

[Jeff Smith]

Rick,

I would like to add to what Francis has stated below. 
The lever can be moved after the engine is in motion
and up to speed.  The valve cuts off the amount of
steam as he stated, the part that I am adding is that
the engine now is using the expansion power of the
steam at the operating pressure to move the piston so
the valve can make a shorter stroke to let less steam
in the cylinder.  

Jeff   



--- Francis Orr <steam.boat at verizon.net> wrote:

> The motion has to do with Ahead & Reverse while the
> amount of valve travel
> has to do with the period of time that steam is
> admitted into the cylinder.
> As you move the Reverse Lever towards the mid
> position, the amount of valve
> travel is reduced thus admitting less steam into the
> cylinder and yes it
> does effect the power output. You need a lot of
> power to get a train moving
> but not much to keep it moving once in motion.

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