FIELD: aeronautical engineering. SUBSTANCE: sea plane has hull with planing step, wing, vertical and horizontal tails and stabilizing surface. Wing or stabilizing surface is secured on hull at positive angle of incidence above chin of sea plane; leading edge of these components is located before planing step and trailing edge is located after planing step. EFFECT: improved aerodynamic properties and adequate reserve of longitudinal and transverse stability. 8 cl, 3 dwg
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