Chilly I'm really starting to worry about you. 2nd year apprenticeship class covered drilling air to make holes that allowed important people to fart at lower pressure so they didn't need to work up a head of steam to overcome 1 atmosphere.
Drill motor looks like the power unit from an old truck frame drill.
Motor part is similar to the motor portion of an air mop, probably makes 5 horsepower.
Frame drills looked like a dent dozer with a drill mounted on the vertical arm. Carriage was chained in position against the truck, drill positioned on the vertical arm indexed to the punch mark and wound up. Second valve on the carriage similar to the column mounted spike on an air brake truck applied air pressure to a diaphragm to push the drill into the work.