Another Kozzie Q popping up from Downunder...heh heh :)

[Overmod]

FWIW -- UP used Challengers on passenger service, and indeed had some painted in the passenger gray colors.

N&W routinely used class As in heavy passenger service, and in fact equipped some with passenger communication whistles (one of these was quite recently on sale at eBay)

My understanding is that SP used cab-forwards of some classes for heavy passenger work.

I suspect that under a slightly wider classification of 'passenger' service (i.e. troop trains) there was more extensive use of articulateds -- Big Boys, for example.

The PRR T1 is, of course, not an articulated locomotive. Neither were the Q classes. These are duplex-drive, with two separate "engine" units in a common rigid frame.

In my opinion, quite a bit of limitation on the use of articulateds as passenger power is in the economics of locomotive efficiency vs. passenger-train size. Platform length limits the effective size of a passenger train, even if the train can be divided into 'rakes' of cars and switched to separate platforms at intermediate stations. By the end of the '40s, a number of the large eight-drivered locomotives were capable of running trains of over 20 cars in normal service, which is already over what an individual 'section' of a name train would be. A properly-designed articulated would be capable of working heavier grades unassisted, or a given 'ruling' grade at higher speed, but at the cost of higher capital cost, complexity, and fuel consumption at all other times; the relatively lower effective maximum speed of the hinged engines imposes an upper limit (although perhaps not always a meaningful one) on the end-to-end trip time for a train -- which is usually the important criterion. In some cases -- I believe UP is an example -- the ability to work a couple of intervening steep grades without helpers or helper-related stops and delays was 'worth' the added expense of using fast 12-coupled 4-cylinder power in lieu of 4-8-4s.

To my knowledge, C&O did not use Alleghenies in passenger service, although I think they would have been among the most appropriately-designed articulated locomotives to be used on that railroad for such a purpose. (Wouldn't it have been interesting to see a couple of them in yellow-and-stainless shrouds for use on the Chessie streamliner after the failure of the M-1 turbines?)

[Modelcar]

Mark....Didn't the TI actually do some passenger work on the Pennsy...?

[Kozzie]

QUOTE: Originally posted by M.W. Hemphill

Dave, I've run through all the possibilities in my head for railroads that used modern (post WW1) articulateds as road power (not helper power) on passenger trains and come up with only UP, which assigned Challengers to heavy passenger trains on the OSL-OWR&N and on the LA&SL. Any of the Kratville UP power books would tell you how many and which class and when. (UP used heavy 2-10-2s as road passenger power in the Blue Mountains, too, the only railroad I can think of that did that, either.)

If you want to consider helpers to be passenger power -- which is not something a railroad would consider -- then it gets complicated really fast, because everyone used everything for a helper sooner or later, from 0-6-0s to high-drivered 4-6-2s, depending on how desperate they were that day.

If anyone cares to go through LeMassena's book Articulated Steam, it will have the answer for every road with articulateds.

Modelcar, sorry to disappoint, but PRR had no articulateds other than a couple of experimentals that they banished to hump yards to toil in complete obscurity.

Thanks Mark - Looks like freight was the main job for these locos.
(pssst..Mark - did you get my message?)

Dave

[Kozzie]

Thanks Train Guy 3 and Modelcar, others may be able to post as they read this one.

Cheers

Dave

[Modelcar]

Dave, I'm quite sure the answer is yes....I personally can't give you the specifics without looking up some data but pretty sure we can say yes. Wouldn't be a bit surprised to have found them helping up around the Curve at Altoona and to the summit back in steam days. I'm sure others on here can cite some examples.

[Train Guy 3]

I think the N&W may have used a Class A (2-6-6-4) for passenger services before. I know they took Class J's(4-8-4) and used the in frieght service before.

[Kozzie]

Were the articulated steam locos ever used for regular passenger services, or any at all...or were they really only used for freight haulage? [:)][;)]

(I'm always on the lookout for something diferent in the passenger train world..heh heh [;)] and I suspect an articulated steam loco hauling passenegr cars would be a bit unusual...???[:0][;)][;)])

Hope y'all are having a great Summer [8D]

Cheers [:)][;)]

Dave [:)]