The whole duty of airplanes is now made manifest, in 52 folio pages, compiled, examined and approved by expert engineers, designers and men of the air. Last week H. M. Crane, General Motors technician and chairman of a joint committee of the U. S. Bureau of Standards and the Society of Automotive Engineers, announced completion of the "aircraft safety code." A five-year labor, the code includes regulations for the design, manufacture, testing and operation of all types of craft, qualifications for pilots, traffic rules.
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