[totally snipped]

Discussion has drifted to using compressed air as energy-storage medium.

A company I used to work at processed wire, and powered the take-up
reel with a rotary-vane air-motor, used as a constant-torque drive.
Its air consumption was horrendous for the small amount of work it
did.

Another company used an old steam-powered fixed-crane to lift small
barges in and out of the water. Its boiler was long gone, so a 1000
CFM diesel air compressor powered it. Sometimes barely...

Are there available air motors efficient enough to make this storage
scheme practical?


Tom Willmon
near Mountainair, (mid) New Mexico, USA

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