I have had my RRSC American suddenly race from priming while on jacks and running free. No superheat on the 4-4-0. Unka Jess > The second one refers to "Blue Peter" which was departing Durham with a very > high water level in the boiler. The driver was rather over enthuiastic, the > loco primed very badly, lost its feet and slipped so much that it destroyed > many pieces of motion work. This is from my mate referred to above who has > seen a video of the incident in which pieces of motion work can be seen > being thrown in the air! It is now part of a training video for aspiring > mainline steam crew. Apparently when a large locomotive primes badly the > solid water passing through the regulator valve makes it impossible to close > the regulator, the water then flashes into steam in the superheaters which > were very hot as the loco had been standing in Durham station for a while. > The vast volumes of steam produced then do the damage referred to. > > Barrie Purslow > Warrington UK > > > > > > > -- > Internal Virus Database is out-of-date. > Checked by AVG Anti-Virus. > Version: 7.0.298 / Virus Database: 266.5.0 - Release Date: 2/25/05 > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.