Anti-missile protection device for an aircraft

Abstract

This protection device ( 4 ) includes on the one hand a decoy ( 10 ) that permits sending out electromagnetic signals and on the other hand a device ( 8 ) that winds/unwinds a cable ( 6 ) at one end of which the decoy ( 10 ) is secured, with this device permitting to keep the decoy ( 10 ) in its wound position on board of the aircraft ( 2 ) and in its unwound position at a distance from the aircraft ( 2 ).

1 . Anti-missile protection device ( 4 ) for transportation aircraft ( 2 ) comprising 
 a decoy ( 10 )    a winding/unwinding device ( 8 ) for a cable ( 6 ) at one end to which is secured decoy ( 10 ), with this device permitting to maintain decoy ( 10 ) in its wound up position inside the aircraft ( 2 ) and in its unwound position at a distance from the aircraft ( 2 ) and    a control device that manages the winding and unwinding of cable ( 6 ) to which decoy ( 10 ) is attached according to the flight stages of the aircraft ( 2 ).    
   
   
       2 . Device according to  claim 1 , characterized by the fact that the control device adapts the unwinding speed of cable ( 6 ) on the basis of at least a parameter selected from all of the flight parameters comprising altitude and vertical speed of the aircraft ( 2 ).  
   
   
       3 . Device according to one of claims  1  or  2  characterized by the fact that the control device adapts the winding speed of cable ( 6 ) according to at least one parameter selected from all flight parameters comprising altitude and vertical speed of the aircraft ( 2 ).  
   
   
       4 . Device according to one of  claims 1  to  3 , characterized by the fact that the control device adapts the length of unwound cable ( 6 ) according to the flight parameters of the aircraft ( 2 ).  
   
   
       5 . Device according to  claim 4  characterized by the fact that the control device adapts the length of unwound cable ( 6 ) according at least to the altitude of the aircraft ( 2 ).  
   
   
       6 . Device according to one of  claims 1  to  5 , characterized by the fact that decoy ( 10 ) is a device that transmits multidirectional infrared radiation.  
   
   
       7 . Device according to  claim 6 , characterized by the fact that the frequency of the infrared radiation transmittal is set to the transmittal spectrum of the aircraft ( 2 ) with which the device ( 4 ) is associated.  
   
   
       8 . Device according to one of  claims 1  to  7 , characterized by the fact that in the wound position of the decoy ( 10 ) and the winding/unwinding ( 8 ) take place in a compartment located in the back of the plane ( 2 ) and closed by a trap door ( 16 ) leading to the outside of the airplane ( 2 ).  
   
   
       9 . Device according to one of  claims 1  to  8 , characterized by the fact that the decoy ( 10 ) has a conical form.  
   
   
       10 . Device according to one of  claims 1  to  9 , characterized by the fact that it also includes a surveillance device informing the pilot of the aircraft ( 2 ) of the wound or unwound status of the cable ( 6 ).  
   
   
       11 . Device according to one of  claims 1  to  10 , characterized by the fact that the length of the cable ( 6 ) is between 10 and 150 m, preferably between 20 and 50 m.  
   
   
       12 . Device according to one of  claims 1  to  11 , characterized by the fact that the decoy ( 10 ) secured to an end of cable ( 6 ) is associated with a missile detection system.  
   
   
       13 . Device according to  claim 12 , characterized by the fact that the decoy ( 10 ) includes an infrared one-directional transmission device.  
   
   
       14 . Device according to one of claims  12  or  13  characterized by the fact that the decoy ( 10 ) includes a device permitting the launching of light flares.  
   
   
       15 . Aircraft ( 2 ) characterized by the fact that it includes a protection device according to one of  claims 1  to  14 .  
   
   
       16 . Aircraft ( 2 ) according to  claim 15 , characterized by the fact that it is aimed at the transportation of passengers.