b&m 1566 wrote: ↑Fri Jan 15, 2010 10:09 pm Why were the dynamic brakes removed from the F7's? Since the 4266 is still in operation, I wonder if it would be possible for the dynamics to be reinstalled; the folks at Conway Scenic could sure use it!Well nobody answered this for 11 years, so I'll take a go at it!
JayBee wrote: ↑Mon Jan 25, 2021 12:22 am X2200 South shows 4268A as being built seven months after the other three and it has a builder's number totally separate from the others.The B&M roster in Extra 2200 South shows the final rebuild date and sale date for the F7A that became B&M #4268A. The history of the former EMDX #930 is that it was built in March 1949, the same as the other three B&M F7As. The #930 was used in high altitude testing, there is a photo of it testing on the Rio Grande. After testing the unit returned to EMD and was placed on loan to the Burlington at the Chicago Railroad Fair. Then the unit returned again to EMD for refurbishment, likely some internal electrical changes and sale to the B&M in October 1949. The EMD 16-567B engine blocks originally installed in 4265A-4268A are serials #6842, 6816, 6822, and 6818 respectively.