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Production. Airplane propellers. John Sonesen, propeller blade grinder at a Hartford, Connecticut plant, inspects a blade…
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Production. Airplane propellers. John Sonesen, propeller blade grinder at a Hartford, Connecticut plant, inspects a blade for a vertical balance during the operation of grinding it to correct contours in a template. This blade will be assembled in a hydromatic mechanism to help power one of our new warplanes. Sourced from the Library of Congress.

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Production. Airplane propellers. John Sonesen, propeller blade grinder at a Hartford, Connecticut plant, inspects a blade for a vertical balance during the operation of grinding it to correct contours in a template. This blade will be assembled in a hydromatic mechanism to help power one of our new warplanes. Sourced from the Library of Congress.

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