Re: Class 45.5 and boilers

dougvv Wrote:
-------------------------------------------------------
> Hi,
>
> How big would a boiler have to be to supply two
> class 45.5 engines? Any guesses?



>
You'd need to ask an engineer (the kind that designs them, not the kind tha runs them) to get a definitive answer to that.
To get you started though, the boiler for the D&RG class 45.5 engines (#'s 158-165) had the following stats:
FB: length inside = 57", width inside = 25", Ht, front = 45", back = 44.5"
Flues: # of 132, OD = 2", length = 10'-9".
Grate surface- sq ft = 9.89
Heating surface(sq ft): Flues = 729.8, FB = 60.0, total = 789.8
(Information from Folio #4, sheet #1. Reprinted in CRA #24 - pg 254) BP not listed but I'd guess 145#.
Note: This data would be ca. 1904 or so. Just looking at the stats not to very different from the Class 47 engines. I wonder, if there had been a percieved need for more little 4-6-0's in 1912, would the 45.5s gotten the same new boilers as the Class 47s and wound up as T-12s? Sorta the opposite of the Class 70 engines winding up in two (C-17 & C-19) classes?
hank