CNJ used to run a consist that had several RDC-1s and one of the 1300 series round roof coaches, buried in the middle. The local name for this consist was the "Sputnik"; I imagine this was back in the late '50s and named after the Soviet satellite. I know the 1300s had Adlake air conditioning by each and every seat, and the lighting load could have been handled by a 64 VDC trainline jumper from the Budds, but how did they heat the car? DID they heat the car, or was this simply a warm weather operation only?