Nested core gas turbine engine

Abstract

An aircraft, with the ability to cruise at supersonic speeds, designed to increase cruise lift/drag ratio, reduce sonic boom and have greater downward visibility by having an ‘inverted’ nose profile that has greater inclination of the lower surfaces to the flight direction than the upper surfaces.

1 . An aircraft for supersonic operation at least some of the time, said aircraft having a nose pointing above the fuselage centerline, such that the tip of the nose is above the fuselage centerline. 
     
     
         2 . An aircraft for supersonic operation at least some of the time, said aircraft having a nose region configured to have greater inclination to the flight direction, during supersonic cruising flight, on its lower surfaces as compared to its upper surfaces. 
     
     
         3 . An aircraft for supersonic operation at least some of the time, said aircraft having a nose region configured to have greater intensity of inclined shock waves, during supersonic cruising flight, on its lower surfaces as compared to its upper surfaces. 
     
     
         4 . An aircraft for supersonic operation at least some of the time, said aircraft having a nose region configured to have greater static pressure, during supersonic cruising flight, on its lower surfaces as compared to its upper surfaces. 
     
     
         5 . An aircraft for supersonic operation at least some of the time, said aircraft deriving net positive lift from the nose region during supersonic cruise conditions. 
     
     
         6 . An aircraft for supersonic operation at least some of the time, said aircraft having greater cockpit window areas on the lower surface of the nose rather than the upper surface of the nose.