....Haven't had too much comment of what the tunnel entrance doors purpose are....
As I wrote earlier in this thread, I thought tunnel doors purpose {at least in some cases}, is to keep the tunnel air "in place" while a train works it's way thru so the radiators of the engines can have "new" air as it moves forward and not the heated air surrounding the engine if it would be allowed to be "pushed ahead" as the train moves forward.
Any thoughts....
Quentin
That is right Quentin. This also caused pressure to build up in front of the train, and the engineer's ears would pop in some tunnels when the door went up.
Jack Wheelilhan wrote an interesting article in the 2-00 CTC Board magazine. He was helping with the delivery of GN's first GP30s in 1963. When the Cascade Tunnel doors went up, all four GP30s shut down because of the Paxton-Mitchell Crankcase Pressure Detection Device.
....Thanks Dale....That's pretty wild. The engines shutting down.
A little humor!!!
Several years ago I was in Colo. Springs on busines and as I did when I had time late in the day I called an old friend who was a partner in a major garage door business. This firm installed more that garage doors; ranch and farm gates were a specialty.
As my friend and myself sometimes exchanged practical jokes I decided on the spur of the moment to try another. Disguising my voice I called and got the receptionist, (who knew me). I gave a fictious name as an engineering official with the D & RGW and advised that I was waiting on another call but would like to know if their firm had the ability to install doors on the Moffet Tunnel that could be operated by train crews with an electronic opener that each lead engine would have. I knew this was my friends specialty but proceeded by telling the receptionist, who did not recognize my voice, I was in C. Springs and would come to their plant and offices later in the day if they were interested. Of course they were interested and the lady told me to come by as they would stay open to see me.
I entered the office about five minutes before their usual closing time and announced my D & RGW name to the receptionist who broke into laughter and after controlling her emotions called my friend to announce that the man from the Rio Grande was here. My friend and his partner came into the reception room and proceeded to provide me with a few names that shall not be presented here. Then they broke out the cocktail glasses and advised that I had one coming for this prank; and of course they got back at me later.
I love good practical jokes.
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