Retractile and collapsible floats for aircraft

Claim 1

IN VTOL AIRCRAFT CAPABLE OF LANDING ON WATER AND HAVING AT LEAST TWO NACELLES MOUNTED RESPECTIVELY AT OPPOSITE SIDES AND LATERALLY OF THE FUSELAGE OF SAID AIRCRAFT, THE ATTITUDE OF EACH NACELLE BEING ADJUSTABLE WITH RESPECT TO THE FUSELAGE FOR ALIGNING THE LONGITUDINAL AXIS OF THE NACELLE WITH THE DESIRED FLIGHT DIRECTION WHEREBY SAID AXIS EXTENDS IN GENERALLY VERTICAL DIRECTION DURING LANDING AND TAKE-OFF, AN EXPANSIBLE AND COLLAPSIBLE FLOAT CARRIED AT THE AFT END OF LATERALLY POSITIONED NACELLES COMPRISING A FLEXIBLE WATERPROOF SKIN FORMING THE OUTER SURFACE OF THE FLOAT, AND MEANS SUBJECT TO PILOT CONTROL FOR EXPANDING SAID SKIN TO FORM A BUOYANT COMPARTMENT AND FOR EXTENDING THE FLOAT DOWNWARD FROM ITS SUPPORTING NACELLE INCIDENT TO A LANDING ON WATER, SAID MEANS ALSO BEING SUBJECT TO PILOT CONTROL FOR RETRACTING THE FLOAT INCIDENT TO TAKE-OFF AND FOR COLLAPSING SAID COMPARTMENT INTO A COMPACT STREAMLINED CONFIGURATION SUBSTANTIALLY CONTINUOUS WITH THE NACELLE AND FORMING ITS TRAILING END DURING FLIGHT CONDITIONS.