Jim,
You wrote:
> The 1:19 ratio is for the Length: ID.
> Try 3 x 3/8"OD or 4 or 5 x 5/16 perhaps.
>
> The Schools replacement boiler using a JvR type "C" layout that was
> published, uses two 1/2" tubes in a slightly longer barrel and that steams
> 2 cylinders about thye same size as you will want.
Sounds workable.
I'm currently up to the Mark VII design, which is proving to be unwieldy;
I'm going back to the simpler versions. Fewer and bigger flues appears
the best direction to head at the moment.
Which leads me to a related silly question: In a situation where a
semicircle won't fit between the bottom of the boiler barrel and the top
of the firebox, wouldn't it make sense to make the top of the firebox
elliptical?
- - Steve
