by Passenger
When I was a kid in NYC in the 1960s, one could always tell by sound if it was a train of old R-1/9 cars in the IND. That is when the train was starting up. As it accelerated the whine became higher pitched and inaudible.
Two technical questions:
1) What was the *clunk*?
2) Was the whine because the motors were old (wearing out), or simply because the design was not modern?
Two technical questions:
1) What was the *clunk*?
2) Was the whine because the motors were old (wearing out), or simply because the design was not modern?