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

[Ken Majeski]

I believe on the Case the the wide side of the valve went to the rear which 
would be toward the crank. But on your Huber the cylinder is on 
Backwards...:( It would also depend if your rocker is direct or indirect. 
The later Cases are indirect and the early are direct. I do not know for 
sure if the later cases have one end of the valve wider or not. Seems like 
in my Minnie it was the same on both ends but that was the later valve gear 
with the indirect rocker.

Being the fact that the Wolf is not a perfect gear and the angularity of the 
connecting rod you will probably have to Fudge some on the timing 
adjustment. It seems like the early valve gears have a lot faster acting 
valve then the later. One my Case (1904 engine) even before I put the ball 
bearings on the valve valve gear the valve would open full port plus where 
on my Minnie (1920) it would only open a little over half port. In the later 
Case manual it says not to be concerened if the valve does not uncover all 
the port. That little green book ( Steam Engine Guide) has directions for 
setting woolf reverse. I would geuss your engine has woolf reverse as the 
later Hubers have...???

The guy that did my valve seats used a flycutter with light cuts where some 
machine shop probably would use a multi tooth cutter to increase 
productivity... And the result was a rougher surface...



Ken Majeski, Ellsworth Wis. Case Steam Engine,  Rumely Oilpulls H, F, & R. 
Website, Http://www.pressenter.com/~kmajeski/




>From: "Andre' Blanchard" <andre at usermail.com>
>Reply-To: Steam-engine mailing list 
><steam-engine at lists.stationary-engine.com>
>To: Steam-engine mailing list <steam-engine at lists.stationary-engine.com>
>Subject: Re: [Steam-engine] Valve Seat, too smooth...fitting
>Date: Fri, 13 May 2005 15:29:54 -0500
>
>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.
>
>
>
>_______________________________________________
>Steam-engine mailing list
>http://www.stationary-engine.com/mailman/listinfo/steam-engine