I recently came across some CPR booster units. Here are some pictures:
The first pic is of a class SB-10a while the other is of a class SB-10b. I know these were produced by Montreal Locomotive Works (an ALCo subsidary) and all were retired by 1982.
Does anyone have info on technical specifications? What I mean is horsepower/what they were ran with/differences between the two classes.
Thanks in advance.
http://www.mountainrailway.com/CP%20B100%20Page.htm
The 4 boosters were ballasted bodies riding on switcher trucks. They did not have their own engine, and recieved power from S-2 switchers (7033, 7038 and 7039 were fitted with hump control and hump signals). B102 and B103 were built later with one powered truck, later upgraded to two. The first pair were ordered for the St. Luc hump, and some were also used in Fort William (now Thunder Bay).
This is from page 95 of Canadian Pacific Diesel Locomotives.
Hmm, so are they are basically like slugs? The description seems right, because slugs are essentially unpowered units w/ballast for tractive effort that are hooked up to powered units.
BTW was there any visual difference between hump control S2's versus regular S2's?
I would call them slugs.
Booster control units-1950- 7033, 7038, 70391957- 7081, 7082, 70831966- 7030, 7040
This picture of 7082 shows a box on the walkway right in front of the cab, which should be an auxiliary generator for the hump signals.http://www.mountainrailway.com/Roster%20Archive/CP%207000B/CP%207082.htm
On 7039, it was twice as big, and almost reached the bottom of the window.
They definitely would fall into that very small category of factory-built slugs. I remember seeing one of them in Thunder Bay in 1976 mu'ed with an S2. The only other factory-built slugs of which I'm aware are MATES built by GE for SCL/SBD/CSX and some hump and yard slugs built by GMD in London for CN. Dale might be able to help out with the particulars.
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