Tanks in World War I
The continued need for four men to drive the tank was solved with the Mark V which used Wilson's epicyclic gearing in 1918. Also in 1918 the French produced the Renault FT, the result of a co-operation between Estienne and Louis Renault. As mentioned before, it had the innovative turret position, and was operated by two men. At just 8 tons it was half the weight of the Medium A "Whippet" but the version with the cannon had more firepower. It was conceived for mass production, and the FT became the most produced tank of World War I by a wide margin, with over 3,000 delivered to the French Army. Large numbers were used by the Americans and several were also lent to the British.
Turtle Creek Industrial Railroad
A Norris family engineer summarized the company's key to its plan for turning the railroad to profitability, "Conrail needed a seven man crew to run the line. We do it with two men and a dog." In addition to the engineer's pit-bull, the TCKR employed 4 persons, nominally two engineers and two brakemen. They would do everything including driving the trains, keeping the railroad's 1940s era locomotives running, and maintaining the track. They also had the skills and equipment to re-rail minor derailments, as well as replace damaged rail ties using only hand tools if need be.
As many as three round trips per day were possible on the line, and Dura-Bond believed that trains of up to 10 cars could be safely transported. Trains running 3-5 times per week, averaging 4 cars per train would come to be described as typical. A routine daily shipment began with Conrail dropping off a train in Trafford. Next Conrail would pick up a train of empty cars to be returned that had been previously left there by the TCKR. Later that day a TCKR locomotive would pick up the loaded train that had been left by Conrail and take it to Murrysville and/or Export for distribution to customers. Cargo could include steel products, lumber, aluminum and rubber, and single train could contain cars destined for multiple different locations. Sidings positioned along the single track in Trafford, Murrysville and Export made it possible for a TCKR locomotive to run around a train parked at any of those places, allowing it to detach cars from the train and push them to their individual recipients. Once deliveries had been made, the process would be reversed, as the short line's locomotive would gather and return empty cars to be towed back to Trafford where they would be picked up again by Conrail. The TCKR's staff promised to work to keep the freight cars moving, stating that the cars "cost you money" when just sitting on a siding. This won praise from the customers; two that were interviewed after the first year Dura-Bond owned the railroad commented that service had improved dramatically. One noted that shipments which could be delayed over a week on the transfer track when Conrail owned and operated the line were arriving the same day under the new local ownership and management.