Armstrong Whitworth V4 Pneumatic Air Motor

2 08 2012

Armstrong Whitworth Pneumatic Tools made a selection of Air Drills.  This particular one was made in the 1930’s

The Patent on the Brass Name Plate refers to the method of attaching the Con Rods to the Crank Shaft.

The motor produces very high torque from the V4 layout and will turn very slowly at a low air pressure – a minimum of 5 psi is required to turn the motor.

More details and Photographs including the Patent documents are available at




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