This paper describes the model III Modelling and Analysis of the Double Bubble (DB) fuselage at different pressure loads condition. The computer analysis includes the computation of circumferential stress, total deformation, maximum stresses. The advantage of DB fuselage is to increase the payload carrying capacity and contributes towards the increase of lift. The modelling of the fuselage has been carried out with different configurations so as to minimize the total deformation. There is the research compulsion to modify the existing fuselage geometry to accommodate more number of passengers with less cost. This project optimizes the design using SOLIDWORKS latest version. The in-depth analysis have been carried using ANSYS R18.1 version. Three models has been created and compared for optimized characteristic parameters. This project fulfills the gap between the passengers comfort and airlines economy. The computations of three models give a converging results. Model III has almost elliptical geometry which obtained by the DB concept and it has the least computational result values. The model III provides more seating space for the passengers.