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GENERAL DATA. In the course of the summer of 1920 (May-September) the two series of Fokker aeroplanes, with which this report deals, (D-VII scouts and C-I reconnaissance machines), were delivered to the Dutch Military Flying Corps (Luchtvaartafdeeling).

The construction of these airplanes differs from the more orthodox design in that the wings are of cantilever type, and the whole of the fuselage, the tall planes and rudders, the wing struts and the central wing fittings and constructed of welded steel tubes. The reconnaissance type carries its petrol tanks in the landing chassis.

The mistrust felt in some quarters against cantilever wings in general is so unfounded and denotes such a lack of knowledge of the stresses to be considered that we may regard it as a thing of the part.

Reflections of this kind were not considered when the order for these aeroplanes was given, but of course the contract stipulated various static tests. The actual strength in all cases (direct wing loading and wing torsion) was far beyond the requirements.

A certain amount of distrust is still felt in many quarters

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