On Jul 24, 3:14*pm, The Real Doctor wrote:
On Jul 24, 2:14*pm, Andy Breen wrote:

...rather than enhancing thermal efficiency.

Surely thermal efficiency has almost always, for locomotives, played
second fiddle to maximising power?

ian

True but the greater the efficiency the less coal was needed and the
fewer stops needed to get more.
Some loco were double expansion just to improve efficiency.
(Marginally)
The overall efficiency is in the order of 2%. Pretty crap. Loco
boilers are exceeding crap efficiencywise
Marine engines had to be more effiicient some were triple and
quadruple expension plus condensers. This extended the range of ships.