In September of 1952 Model Railroader magazine published an article by George Allen titled "Spindletop No. 4". This article describes in great detail how to build an oil well pumping rig, delicate-looking tower and pump house with notes on how to make it operate. George drew the plans and built his rig based on actual plans loaned to him - for one night! - from a friend in the engineering department of an oil company. Naturally he took some liberties for the sake of simplicity without sacrificing all of the detail. He was also limited by the materials available to the average modeler of the time; card, metal and wood.
Printed on page 24 is this diagram:
Now look at this load:
I know next to nothing about the origins of this flat car. However, I can say with confidence that the dimensions of the load are identical to the George Allen drawing. The large counterweights and the axle between them are free to move, sliding laterally in the motor mount, and would no doubt revolve as intended if not for the chain holding them down. The load is made from wood, paper and metal, just as the article instructs.
Figuring that out was the easy part. The rest of the car...there's the challenge. It is obviously scratchbuilt with painted lettering. The large metal center sill matches the one used on the Suydam reefer I just wrote about in the previous post, but that's the only similarity as Suydam offered no similar kit. The other commercial detail on the car are the end sills. Everything else is built up from wood and metal, including the bolsters, stake pockets and underframe cross members.
Being primarily wood with only the center sill and trucks to provide any weight, the car was very light. Also, the trucks weren't mounted exactly on the car center line. I was able to fix the alignment issue when I replaced the wood bolsters with metal castings. For the weight I beat a hunk of old lead into less than 1/16" thin sheets to add some weight to the car. The final bit of weight came from a metal K brake cylinder I used to replace the original plastic one. In total the car now weights just shy of 3 ounces, about an ounce and half away from the NMRA Recommended Practice, but enough to keep it on the track without any trouble, so far.
As for a prototype, I found that the T&NO did roster flat cars in the 23xxx range...but the only examples I could find were older truss rod cars. A similar T&NO design with fishbelly center sill was rostered in the 22xxx range, so somewhere in between may lay the truth. And what about the pumps? The first producing onshore oil well in Florida came online in 1943, a bit later than my era. However, a load such as this moving down through the state on its way to a port for shipment is plausible. I'm just pleased to be able to include a scratchbuilt car with such a beautifully constructed load in my fleet.