on Mon Jul 16 18:07:04 2012, in response to Re: (Belated) Requiem for the R-44, posted by Joe V on Mon Jul 16 16:45:14 2012.
In certain ways, the R-9s were slightly less technologically advanced than the BMT steels but their braking and motor control systems were better. I have always suspected that the reasons the R-9s lacked certain of the features of the BMT equipment had to do with the patents on such things as tripcocks that reset from the cab and running lights that changed when the reverser was thrown. Since the IND was initially a tool of Hylan, I don't think he wanted the city to reward what was essentially the IND's competition by paying out any royalties. As for the lack of inside door controls, even the BMT had switched to outside door operation with the D types rather than retaining the inside door controls of the steels but I never understood why. From what I have seen of other transit systems, it looks like that state of the art for rapid transit cars from the 1920s even into the 1950s was to have the C/R operate the doors from between the cars rather than from inside.