Airship Design |
Other editions - View all
Common terms and phrases
actual aerodynamic Aeronautics angle applied assumed axis base bending buoyancy cables calculation carried channels coefficient component compressive considered constant construction cross-section curve determined diameter difference dimensions direction distance distribution duralumin effect engines envelope equal equation example expression fabric Figure follows forces fuel gas cells gas pressure girders give given greater hull important increase intermediate frames joints keel lattices length less lift load longitudinal main frames maximum method netting nonrigid obtained outer cover panel plane practice problem produce radial radius ratio reduced resistance resulting rigid airship rudder shape shear wires ship shown shows side space speed static strength stresses structure surfaces suspension Table tail surfaces tangential tension tests theory thickness transverse unit usually values valves varies vertical volume weight Zeppelin
Popular passages
Page 159 - A, by n, the ratio of the modulus of elasticity of steel to that of concrete. For compressive reinforcing, the area A„.
Page iii - We are at the opening verse of the opening page of the chapter of endless possibilities.
Page 149 - Ships," read before the American Society of Naval Architects and Marine Engineers in...
Page 30 - Show that the perimeter p of a regular polygon of n sides inscribed in a circle of radius R is that the radius r of the inscribed circle is and that the area S of the polygon is 34.
Page 89 - If m' is the actual mass of the ship, the effective mass m, that is, the ship's actual mass plus its virtual mass due to accelerating the fluid, can be taken as about 1.5 m' for transverse accelerated motion whether normal or lateral. Since both static and damping forces, due to 0 and q, are present, it is advantageous to place in evidence the components of Z and M. The part of Z due to 6 is 0Z», where Z, denotes dZ/d0; the part due to q is qZq.
Page 149 - ... the limits determined by the methods of shear and bending. Since the forces in the longitudinals are due to the forces applied by the shear wires at the joints, it is possible to choose shear wires proportioned to any system of longitudinals in such a manner that the tensions in the wires will so load the longitudinals that the frames remain plane.
Page 83 - ... consists in the investigation of one complex function all stresses and momenta of the shell can be expressed by the real and imaginary parts of this function. This function, designated by 5, is determined by the differential equation where the dots denote differentiation along the arc of the meridian...
Page 90 - These two equations are simultaneous, and taken together represent approximately the conditions essential for dynamically stable motion, ie, for unamplifying pitch, expressed in familiar aerodynamic quantities. By (5) the damping moment qMq rotationally balances the disturbing moment...
Page 33 - ... the sum of all the intermediate ones; the result multiplied by the common distance apart will give the area required.