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Eldest of the five sons of Professor Claude Dornier, founder of the Dornier Company, Herr Claudius Dornier (62) is a Vice‐President of the BDLI and served as President in 1966. He became Chairman of Dornier in 1962.

THE leading thought in the design of the Do.X. was that to lead to the desired goal only that which had been technically proved could be used. Every kind of “experimenting” was ruled out from the beginning. There is no doubt that through this precaution creative work was, to a certain extent, handicapped. The fact, however, that from the commencement of the tests of the Flying‐Boat, up to their completion, only about one hundred working hours were occupied in alterations, proves, in conjunction with the results achieved, that the plan adopted was correct.

In a mechanism for synchronizing multiple prime movers, a liquid pump, a plurality of hydraulic motors in series therewith, there being a hydraulic motor for each prime mover, differential means associated with each of said prime movers and operable by the difference in relative speeds of said prime movers and said hydraulic motors, and mechanical connecting means positively connecting a speed control member of each of said prime movers with the respective differential means for governing the speed of each of said prime movers.

THE future prospects for collaborative ventures were outlined recently to the Royal Aeronautical Society by Allen Greenwood of BAC who is the President of the European Association of Aerospace Manufacturers (AECMA). It is considered that the only successful course for European Aerospace is to ensure that it meets its own needs, otherwise it will become a junior partner to the American industry. Obviously, it does not make sense for a European government to finance both airlines and manufacturers and then buy the majority of its aircraft from the USA. A similar principle applies in the military field where a country's money is used for the purchase of defence equipment outside the continent.

AIRCRAFT ENGINEERING was born in March 1929 of the belief that the emerging technology from which it took its title would become a fundamental element of engineering progress. The keystone of its policy was that it would attempt to meet the needs of engineers and students working in this field and that its contents should be ‘written by engineers — for engineers’. That this venture was fully justified has been amply vindicated by the achievements of the industry during the ensuing 41 years — as recorded in the first 500 issues of this Journal, the major milestone celebrated this month. This is a propitious occasion on which to review the record to date because, although aviation has always been about looking forward, history is instructive and it is the impressive performance of the aerospace industry to date that inspires and motivates confidence in its future.