[PSUBS-MAILIST] automatic spool

[hank pronk via Personal_Submersibles]

Hi James,Been thinking about your automatic spool for towing a surface buoy, can't remember if you mentioned an air motor.    A simple air motor   with a constant air feed could work.  The motor and spool would have to be at the surface on or under the buoy.  I am not sure how tight an air motor is, but if the motor could hold back low air pressure, it could work.  The motor would be direct drive to the spool, in fact the air motor could be the spindle for the spool.  If a constant low air pressure is fed to the motor, the line  could be pulled out against that pressure.  The pressure it build up( acting as a pump)  would vent out the regulator.  The sub could pull the line down and when the sub surfaces, the air motor would wind in the line.  I doubt a vane motor would work unless the vanes are spring loaded.  A diaphragm based motor would be ideal.Hank 
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