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

[Andy glines]

The Woolf valve on my 1905 Huber is direct like your
Case.  They probably look exactly the same except that
my cylinder is on "backwards".  My valve was assembled
correctly with the wide flange toward the crank.  I
was asking because I'm not taking things for granted
on this machine.  In 100 years there have been plenty
of opportunities for someone to monkey with it.  
--- Ken Majeski <fuller_johnson1 at msn.com> wrote:
> 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.
> >


Andy Glines
Evansville, IN


		
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