To enable control to be maintained at or near stalling speed or in a spin, the tailplane 12 and elevators 13 of a swept‐wing aircraft, FIG. 1, are mounted to lie entirely below the horizontal plane Y—Y passing through the lowest points of the wing trailing edges when in the attitude of normal horizontal flight. In the case of a delta‐wing machine, FIG. 2, the elevons 22 are mounted on brackets 23 projecting below the wing trailing edges.
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