Re: boxcar roof mystery
Guy Wilber
Dennis wrote:
“Seems I recall the NKP had some auto cars that were built based on an earlier design, where it was found the new diagonal pressing interfered with the loaders, and so the cars were built with diagonal panels EXCEPT for two; those were the older rectangular design to gibe the needed clearance.“
Dennis,
The "mixed panel" roofs were discussed some time ago:
Ed Hawkins wrote:
"Dave, I have confirmed the following cars having the combination diagonal
panel/Murphy panel roofs. There were probably more. All were auto cars with 15' wide door openings built new with these roofs. You have already referenced Tony's book and some specific SP cars. D&TS 5000-5099, 2-55, Greenville MP 88900-88999, 6-57, MP NJI&I 3300-3399, 1-51, ACF NKP 86100-86249, 12-49, ACF NKP 86200-86349, 1-55, Greenville Numerous SP cars, 1950-1956, all built by SP WAB 19800-19999, 5-53, ACF WAB 20000-20199," Guy Wilber wrote:
"Ed, Other than the SP cars, none of the above cars were equipped with Auto~Loaders. The balance were in parts service. Whether, or not, the cars were purchased by the respective roads contemplating installation of Auto~Loaders I do not know. Until Evans developed the Type "F" with a boom hoist and the Type "G" the rectangular panel was required to facilitate the supports for the lifting sheave hanger frame and the similar frame that supported the safety hook assembly used to secure the racks when stored against the roof of cars. Evidently, Evans lift assemblies were also used within auto parts cars utilized for shipping car bodies. I have some literature on the system but have yet to find a complete installation drawing. I believe that may offer another connection to the mixed panel roofs." Regards,
Guy Wilber Reno, Nevada |
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