A composite aircraft comprising two component aircraft capable of separate flight mounted one on top of another and initially connected together by releasable locking means so as to take off, fly and land as a single unit, has the wings of its upper component formed of a profile and aspect ratio of appreciably wider angular range between the angle of no lift and the angle of maximum lift than the corresponding angular range of the profile and aspect ratio employed for the wings of the lower component. As the speed of the composite craft increases the proportion of the lift taken by the wings of the upper component increases and that of the lower component diminishes until a speed is reached at which a force is available for ensuring the safe separation of the components when the locking means are released, without the necessity of adjusting the lift coefficient of the wings of the upper component. The Fokker F VII or Göttingen 387 wing section may be employed on the upper component and the R.A.F. 15 or R.A.F. 34, or according to the Provisional Specification R.A.F. 31, for the lower component. Alternatively the angular range of the wings of the upper component may be increased by the use of fixed or adjustable slots, in which case the R.A.F. 15 or R.A.F. 31 wing section may be used, or the wings of the lower component may have initially depressed flaps which are raised automatically or mechanically as the speed increases so as to reduce their angular range. The invention may be combined with the means for adjusting the lift coefficient of the wings of the upper component described in Specification 400,292 in which case the difference in the angular range may be less or the amount of adjustment provided for may be diminished. The releasing means described in Specifications 400,292 and 402,997 may be incorporated.
(1935), "Month in the Patent Office: A Selection of the More Important Aircraft and Engine Specifications Published Recently", Aircraft Engineering and Aerospace Technology, Vol. 7 No. 1, pp. 26-26. https://doi.org/10.1108/eb029895Download as .RIS
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