Re: Timing tutorial?

Kelly Anderson Wrote:
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> It makes a huge difference. An engine that is
> properly in time with be able to pull more tonnage
> than one which in "out of square". It will also
> take longer to develop pounds, the bearings will
> run cooler, and fuel economy will be improved.
>
> The work is largely done with blacksmith tools,
> but to a high degree of precision. To the nearest
> 1/128 of an inch is a common goal, so the best
> results are achieved when the machinery has been
> freshly overhauled and the valve setter knows his
> business. For Walscheart valve gear, to order of
> operations, is to:
> 1. Find the dead centers.
> 2. Make the port marks.
> 3. Adjust the reverse shaft arms so the radius
> rods are at the same altitude.
> 4. Adjust the length of the radius rods (forge
> them longer or shorter) to achieve equal lead in
> the valve at both ends of the stroke.
> 5. Set the eccentric cranks (with stepped keys if
> needed).
> 6. Adjust the length of the eccentric rods (forge
> them longer or shorter) to achieve equal lead in
> the valve at both ends of the stroke.
> 7. Adjust the reach rod length with the boiler hot
> to locate the center position.
> 8. Adjust the stops on the reverse quadrant to set
> full cutoff.
>
> With the right tools and a freshly overhauled
> locomotive, the complete job can be done in a day
> or two.


So.... when's that going to be done to the 90?