--- In BRHSlist@yahoogroups.com, "wollffee" <wolfee@u...> wrote:
> On the really old passenger coaches, I think the ones
> called "heavyweights", there was usually a section of raised roof
> down the middle. Did they put ice in there for air conditioning?
> Did air just blow on it, and then on the passengers?
Hi wollffee,
The section of raised roofs on older heavyweight equipment was called
a "clerestory" (pronounced clear-story). In much older times, there
would be smaller windows in the clerestory that could be opened to
aid in the ventilation of the car using the natural air-flow from the
windows that the passengers could open.
Later on, and I'm not sure just when, it was figured out that ice
could be used to cool the cars...however, the ice equipment was under
the car with blowers in the car to blow the cool air into the
passenger compartment.
Some of the heavyweight cars had the duct work on the outside of the
roof of the car. These can be seen in many photos and were mostly
called "blisters". The "Q" on some cars (and anyone please add to or
correct me here) did turn the clerestory part on the inside of the
car into the duct work area.
There was a number of different ways to use ice to cool the car along
with a few non-ice ways (brine cooling comes to mind).
I hope that this answers part of your question and that others can
fill in or correct what I've presented here.
Greg K.
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