Can a solenoid coil generate even a few ft lbs (I guess 5-20 ft lbs) of torque on a 1" to 2" coil, using a steel or iron core (rod)for a stroke of 2" to 3", at a rate say 4 strokes (2 up, 2 down) per second, approximately, and adjustable by a rheostat or potentiometer?
