I have a B&W photo of a USN 80t using the ramp on one of the special DODX flatcars , taken at Seal Beach NWS in the E 80's . It shows the details of the ramps
Rick Rowlands wrote: A six axle flatcar just became available at the Aberdeen Proving Grounds on the Federal surplus property donation list. Might be similar to this car. It has D-22-P passenger car brakes though, which is rather odd.If that car is of the range 38000 to 38800 or so, I understand it to be originally designed to be operated in passenger/troop trains. Supposedly they all had steam piping and passenger brakes. I've found little substantial information on these cars, though.