Duralumin airscrews are giving splendid service on aircraft operating in all parts of the world, and particularly in U.S.A. and Canada, but in some cases operators are not securing maximum efficiency from them owing to neglect on their part in properly assembling them after they have been removed from the engine. Each large operator should be provided with a first‐class checking plate, protractor and balancing stand in order to service airscrews satisfactorily. The following points are often overlooked by users of detachable blade airscrews.
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