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All controls work in ball-bearings. Cables do not run direct to the elevator king post but terminate on the cranks of a transverse shaft some distance ahead of the tail plane. From these cranks steel tubes run to the elevators as in the Italian Savoia type. Hinged joints are surrounded with leather protectors and are well greased, practically the same principle as on motor car controls.
The undercarriage is practically of the famous DH 18 type with a Oleo rubber shock absorber unit in the rear leg of the lateral landing gear "vees".
A heretofore mentioned, considereable trouble has been experienced with tail controls at low speed, and the machine is very heavy. However, Mr. De Haviland is pursuing the tests of this machine with a view towards developing it and remedying the tail controls in the near future.
The tests on the De Haviland 29 monoplane are now being carried out, but not much success is being attributed to this type at present.
The first one has crashed and the main trouble experienc-ed to date had been with proper fore and aft controllability. How-

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