Page 6

As is well known, Mr. Danforth holds certain positive views regarding car ventilation. On this subject he said:

"My observation and experience have shown very clearly that, while the monitor deck roof in its old form may not be desirable, a modern roof must provide the ventilating equivalent of the old type if ventilation is to be successful. In the closed cars now building for the Public Service Railway, a so-called compromise roof is used. This from the standpoint of ventilation is equivalent to the older form of roof, which it closely resembles in appearance. While it is true that good ventilation is secured in a few arched-roof cars, this is due to the fact that in such cars there is considerable space between the roof and the headlining. This space is to a considerable extent the equivalent of the monitor deck, and is used to contain air ducts.

"The difficulty of securing good ventilation in a car in which there is not the equivalent of a monitor deck has been clearly demonstrated by a special car which we use for parties, etc., and which is furnished with both forced and exhaust-draft fans. The capacity of either of these fans is ample to change the air in the car every three minutes, but with both fans operating the ventilation is unsatisfactory. There is a vital ventilating principle in having openings through which air can circulate in horizontal planes as it can in the old-fashioned monitor deck roofs or in the compromise roofs provided with louvers equivalent to the older deck sash. Successful ventilation consists in the movement of large volumes of air, and the ventilating device must create a positive air movement. The difficulty with fans is that they move diluted air. It is possible with a monitor roof so to install ventilators that disagreeable down drafts are avoided."

Quote reprinted from Volume XLIX, Electric Journal, permission of McGraw-Hill, Inc.

006b drawing

Drawing, general information, and dimensions reproduced courtesy of Trolley Talk.

006a chart

Car specs.

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Content: © 1997 Al Mankoff
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Brett Putnam