THE outstanding property of the biplane to be described, as determined from model tests, is stability in roll up to angles of incidence in excess of 40 deg. (Fig. 8). This is achieved without any additional mechanism or parts, simply by the form and disposition of the wings. Maximum lift is slightly increased (Fig. 6) and there are minor advantages as regards coming in to land, aileron control and spinning.
Irving, H.B. (1935), "A New Form of Biplane: A Design with New Features which has Definitely Advantageous Qualities in Roll above the Stall", Aircraft Engineering and Aerospace Technology, Vol. 7 No. 6, pp. 133-138. https://doi.org/10.1108/eb029938
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