[Steam-engine] Valve Seat, too smooth...fitting

[Andre' Blanchard]

Think of it as (head end) and (rod or crank end).
Do to the connecting rod angle, the piston approaches and recedes faster on 
the head end then from the crank end.  The shorter the connecting rod is 
relative to the stroke length the more things will be different at each 
end.  Taken to the extreme, if the connecting rod length is the same as the 
stroke then the piston will sit still for 180° of rotation of the 
crank.  It is also unworkable as the crank and rod cannot push the piston 
out of its crank end position.
I am thinking that this means the wide side of the valve should be on the 
crank end, but I am not sure.

This guy has some real nicely done valve gear design programs that let you 
see these things happening.
http://www.tcsn.net/charlied/

At 01:16 PM 5/13/2005, you wrote:
>As I was working on my fitting the valve to the seat
>last night I paid special attention to the wider
>flange on my valve.  It looks like it ws running with
>the wide edge toward the crank.  Is this how your Case
>is?  I let myself get a little confused by "front" &
>"rear" because the cylinder is to the rear on a Huber.