Additional commentary by Tom Hatfield, "Model 6700 Tamper. This is a high
production tamper which does do tamping, lining and leveling."
The basic purpose of an electro-graphic tamper is
to align the track both in elevation and curvature. Travel speed is a 15
mph on a 2% grade, 28 mph on a 1% grade and a maximum speed of 40 mph.
The following photographs show the tampers controls:
