A typical floor plan of a Sperry car is shown in this model with top open. From left to right, rear to front, compartments are: 1. Test center with amplifier and recording devices. 2. Power plant for test truck showing, in usual order, a high current DC generator of the Faraday type (although rectifier supplies are used in later cars, diesel power plant, and air compressor. 3. Comfort facilities, including shower. 4. Sleeping quarters. 5. Living and dining space. 6. Galley. 7. Car operating station, including diesel motor generator for the power truck.

( This Photo is from the article SPERRY RAIL SERVICE in THE BULLETIN National Railway Historical society Vol. 33, number 6, 1968)