Bondurant Grain Express NW-2 #5202. Former Chesapeake & Ohio #5202, built 1949.
Taken early summer of 1990, Kodacolor Gold 400, tansfered with slider duper and a Nikon D200
Locomotive is still in use near as I could tell.
Taken early summer of 1990, Kodacolor Gold 400, tansfered with slider duper and a Nikon D200
Locomotive is still in use near as I could tell.
Category Photography / Still Life
Species Unspecified / Any
Size 822 x 1280px
File Size 1.3 MB
Listed in Folders
Yep, they are antennas, not brake wheels, though I see why they'd called that.
I want to say they were a 'ground plane' antenna. the actual antenna is in the very centre, the 'wagon wheel creates the ground plane. On flat roofed locomotives such as the short hood of a GP-7 you could use the roof as the ground plane. Near as I can tell you found these early antennas on engines that had curved hoods or didn't have enough space on the hood for a regular antenna, or on wooden cabooses. I'd wager, just like inductive systems such as the PRR had, these 'wagon wheel' designs became obsolete as mobile radio technology improved.
I can't find any decent data as to even the radio design other than it was made by Sinclair.
http://www.trainweb.org/sp5623/roof03f.jpg
I want to say they were a 'ground plane' antenna. the actual antenna is in the very centre, the 'wagon wheel creates the ground plane. On flat roofed locomotives such as the short hood of a GP-7 you could use the roof as the ground plane. Near as I can tell you found these early antennas on engines that had curved hoods or didn't have enough space on the hood for a regular antenna, or on wooden cabooses. I'd wager, just like inductive systems such as the PRR had, these 'wagon wheel' designs became obsolete as mobile radio technology improved.
I can't find any decent data as to even the radio design other than it was made by Sinclair.
http://www.trainweb.org/sp5623/roof03f.jpg
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