[Steam-engine] Lead on slide valve.

[Andy glines]

On a stationary engine, you should adjust the length
of the valve rod so that there is equal lead at both
dead centers. (I think)  The "Steam Engine Guide" by
P.F. Rose has some good reading on the subject.
--- Richard Strobel <Richard_Strobel7 at msn.com> wrote:

> 
>   Howdy all;
>    Wachs engine is now up and running but has
> obnoxious knock on both 
> centers.  Crankshaft, connecting rod, crosshead and
> slides, piston rod and 
> piston clearances all seem within normal operating
> range.
> 
>   Now we've been told knock may be due to improper
> valve timing.  i.e. "Lead 
> and Cushion" are important.
> 
>   Please keep in mind, the eccentric is keyed to the
> crankshaft although 
> some evidence of tinkering is obvious.  This engine
> does not have a 
> reverser.
> 
>   Can anyone sic me on a site or explain "proper
> timing methods?"
> 
>   Here's some before and after pictures of our 3
> year project:
> 
>
http://home-and-garden.webshots.com/album/188300547wpVzDE
> 
>   Hope ya enjoy...constructive comments are always
> welcome!!
> 
>   RickinMt. 
> 
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>
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> 


Andy Glines
Evansville, IN


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