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| Re: BMT Standard Roofs and Ventilation (859448) | |||
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Re: BMT Standard Roofs and Ventilation |
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Posted by SelkirkTMO on Mon Nov 16 21:02:03 2009, in response to Re: BMT Standard Roofs and Ventilation, posted by straphanger9 on Mon Nov 16 20:56:19 2009. Actually, if you think about the BMT's penchant for "patent hell," that the arnines had that at all would suggest that the BMT was unable to patent the design. Any of those designs would have flowed some of the warmer air that gathered in the celestory, but the advantage of the "arnine" design was that when the car was moving, bernoulli took over without the need to force air with a motor. And one of the preps for the arnines was struggling with those levers to make certain that those roof vents were open. Some of those levers didn't want to move after a bunch of years which is why I remember them well. :)And them IRT guys were cheap bastards but VERY clever and resourceful. |
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