Old diesel prime mover and drive bullwheel
![Old diesel prime mover and drive bullwheel](https://farm5.static.flickr.com/4120/4849075003_e402d81e60.jpg)
In the technical terminology of elevated passenger ropeways (chairlifts), the motor which provides drive force, in this case a small diesel engine, is called the prime mover. The large pulley that it drives is called the drive bullwheel (the pulley at the top is called the return bullwheel). A modern chairlift would typically be powered by an electric motor, and a small diesel motor would provide auxiliary power, but here, the diesel appears to have been the prime mover.
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EXIF data
X-Resolution | 72 dpi |
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Y-Resolution | 72 dpi |
Exposure | 0.005 sec (1/200) |
Aperture | f/8.0 |
Exposure Bias | -1 EV |
Focal Length | 18 mm |
Focal Plane X-Resolution | 4433.295337 dpi |
Focal Plane Y-Resolution | 4453.608247 dpi |
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