my ESPEE MODELERS ARCHIVE
California's Railroad to the U.S. 1861 - 1996
Western region Timetable #14
Effective Sunday October 28, 1979
Special Instructions - All Subdivisions
Rule 20. REPEATER AIR CARS (RAC) SP 260 thru 266.
see also: Repeater Air Car Detail Images
Note: If for any reason it becomes necessary to transfer control of air brakes to the helper engine located in the portion of the train behind the RAC car with the RAC air equipment in operation, the brake pipe hose connections must be changed. The forward brake pipe must he coupled to the portion of the train having the brake valve which is controlling the train. The rear brake pipe must be coupled to the other end of the train.
B. Procedure for cutting the RAC car out of train.
C. Procedure for adding Repeater Air Car to a train when Repeater Car Air Equipment is not to be used.
D. Train operation of Repeater Air Cars.
E. Loss of main reservoir air on RAC car.
F. Setting RAC car out of train.
Instructions for starting and shutting down compressor engine posted inside of car.
Information compiled from postings to various SP Mailing Lists:
7 cars in total.
All put in service between November 1975 and March 1977
From Lee Gautreaux's website: the The B-70-1 and B-70-2 were 70 ton capacity 50'-1" insulated box cars all built to the same basic design by PC&F in 1959-1960 and featured 9'-0" Youngstown plug doors, Hydra-Cushion underframes, Car-Pac loaders or Compartmentizers and 4644 cu.ft capacity.
It has been reported that (at least) one had a red rotating beacon. None of the photos 'we' have here, show any evidence of a beacon. The red rotating beacon indicates that the main reservoir had depleted to under 100 lbs. This would initiate a service brake pipe reduction which would require the train to come to a halt until the problem could be rectified! At least that is what the rulebook says.
It may be that no two cars were alike, or that modifications were made due to experience...
Tony Thompson's photos of SP 260's interior show clearly that there was no duct at either end of the car leading up to the roof boxes (which, incidentally, were square or close to it, with louvers on all four sides and fairly open screen on top). A very large Ingersoll-Rand compressor and diesel are in one end, while the other end contains what look like regulators and surge tanks. The diesel exhaust appears to be ducted to a couple of the side louver panels. The roof boxes are not connected to anything. Whether this was true of the other repeater cars, I don't know.
The Roof vent boxes were also of different comfigurations: One of the boxes in John Rodger's images has a solid cover on top as opposed to a screen, yet the image of SP 264 clearly has screens on both boxes, as well as screen on the sides. SP 265 has a box with screen on the side and louvers on the end.
Considered opinion is that the cars were originally painted Lark Dark Gray, it has been reported some were painted a dark green in later years. Other colors reported are Medium blue, green and various shades of gray. Color perception and color shift in photos, and then scanning being what it is, most of the photos shown here appear various shades of gray. Depending on the formula of the paint, the light, age and condition of the paint, gray can shift to any of these colors.
Operationally, they were reported in:
If you would like to model one and cannot justify one in a train, then maybe this will give you an excuse:
The Air Repeater Car (#261) near the 4th Street Station (San Francisco), was put there originally while the depot's air compressor system (for charging the air in the trains of cars at the platforms) was down for repairs. Afterward, it was just kept there for backup, since the repeater cars were no longer being used on mainline trains.
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This document prepared and maintained by Richard.A.Percy.
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