<HTML>Need to know specs f/ high pressure boiler used in steam shovels, to incl. blueprints, etc...
Considering Welding one together to fit, have steel dealers who can slip roll the steel for me, however I'm not a boilermaker, just one damned good welder up to any challenge.
<a href="mailto:ashenfern@webtv.net?subject=Re: Doble-Detroit">Peter Brow</a> wrote:
>
> Hi Patrick,
>
> There are people who build replacement boilers for Stanleys,
> and they could probably build one to your specs, except for
> the pressure. Stanley boilers usually run at about 500 psi.
> Typical firetubes will flatten well below 2000 psi. The 1906
> Stanley racer ran something like 1200 psi, & that's pushing
> it. A 2000 psi firetube unit is theoretically possible but
> would be quite heavy among other problems. Available oils
> and materials impose practical limits on steam
> pressure/temp. A monotube boiler is much lighter, cheaper,
> and more buildable in a typical shop than a Stanley type
> boiler.
>
> High rpm is possible but tricky with steam engines, esp for
> homebuilt engines. High-pressure steam is heavier and
> doesn't move the way air does in IC engines. That is a
> complex and controversial subject, and I won't wade into it
> here, except to note that IMO a 2-cyl Stanley-like engine @
> ~1000 rpm max is more easily built from scratch in a home
> shop than a high-rpm or multicylinder steam engine (any type
> is quite a project, though). Ray HasBrouck & Graham Baker
> (try a websearch @ yahoo.com) build steam engines w/o costly
> castings or forgings; info on their methods is on web, and
> might give you some ideas.
>
> A custom chassis can be designed around almost any engine.
> For higher wheel speed, you can upsize the engine and
> over-gear it (engine turns slower than wheels), as in the
> Stanley speed record cars (127+ mph) and some of the Stanley
> sports cars. The SACA Storeroom has blueprints for a few
> engines & boilers, and you can find Stanley boiler builders
> thru the Stanley Museum and probably here in this forum.
>
> Try the links pages here @ stanleysteamers.com and at
>
> [
www.steamautomobile.com]
>
> (SACA) for various resources. A little
> websurfing/searchengining will turn up all sorts of
> interesting and useful info. Some of the personal websites
> listed have great links pages. Note differing info &
> opinions in this field. I tend to favor road-proven types of
> designs & design parameters myself. There are all sorts of
> tradeoffs and possible improvements involved.
>
> Just some ideas; hope this helps.
>
> Peter</HTML>