An airship comprises a fuselage and a supporting structure positioned within the fuselage. A torque sensitivity coefficient K1 corresponding to an amount of change in the engine torque TQact when the parameter changes by a unit amount is calculated based on the engine rotational speed Ne and the fuel injection amount Q, and the engine torque TQb is corrected using the torque sensitivity coefficient K1. A first and a second interconnect line are formed overlying the plugs and in conductive contact with one or more of the plurality of plugs, such that a portion of the resistive material between the first and the second interconnect lines provides a desired resistance. An antenna controller selectively couples any output of the at least one antenna to an input of any of the correlators. A low-pressure gas generated by the membrane gas generator 10 is supplied into each piston pump and the high-viscosity material is introduced into the gas.