Neat story and idea but sparse on details as usual. I love the idea of using compressed air as the motive force and note the inventor also appears to have developed an air powered car first which led him to the locomotive project.
“FROM coast to coast by rail in 24 hours, traveling literally on air—that is what W. E. Boyette of Atlanta, Georgia, claims for his invention, a railroad engine that runs almost entirely on air. Air for fuel—speeds of up to 125 miles an hour on rails—low transportation costs-—these are possibilities conjured by Boyette’s air electric car. After being started by batteries, the car needs only air to keep it running—a close approach to perpetual motion. Inventor Boyette claims his invention is quite simple, even though it is contrary to all principles of engineering. Large tanks on the sides of the car are pumped with compressed air by a starting air compressor which is driven by an auxiliary electric motor and 4800 pound storage battery set. Compressed air then operates the air engine connected to the driving wheels, bringing the car up to speed. As the car moves, a large air compressor directly connected to the front wheels pumps air back into the tanks. An electric generator connected to the farthest rear pair of wheels is continually charging the batteries. Thus the movement of the car refills the air tanks and partly recharges the batteries. With the engine pulling two passenger coaches over a 250 mile rail run, it is said that about $2.50 worth of electricity for fully charging the batteries at the end of the run will be the only fuel expense.” – Source
United States Patent 1904611- Automotive Vehicle – Boyette, William E.