Strasburg 4-8-0

[NW Mailing List]

Although some railroads had whistles that used superheated steam, most the N&W whistles were located on the steam dome or on the line between the steam dome and the turret.  The steam was used before it went into the dry pipe and the superheater.  Although it was very hot at 300 psi, it was still saturated.

Dave Stephenson

--- On Fri, 9/17/10, NW Mailing List <nw-mailing-list at nwhs.org> wrote:


> From: NW Mailing List <nw-mailing-list at nwhs.org>

> Subject: RE: Strassburg 4-8-0

> To: "'NW Mailing List'" <nw-mailing-list at nwhs.org>

> Date: Friday, September 17, 2010, 1:49 PM



> Bud is correct in noting that the

> boiler pressure will make a difference in

> the whistle tone.  We should also recognize that a

> boiler that is delivering

> saturated steam (with water vapor-tiny liquid droplets) or

> superheated steam

> (much hotter steam without any vapor in it what so ever)

> will deliver steam

> at a different density (pounds per cubic foot) which will

> change the tone

> also.  So the class of locomotive and what it has for

> superheaters should

> make a difference.  

> 

> Gary Rolih

> Cincinnati

>