This vessel was somewhat altered on being bought by the Society. Her essential principle is that she can be taken to pieces in a few minutes, and carried in a truck. Her main feature is that she has a ballonet at each end. This is described in the case of type A (_P.L. 2_). This class rise with the forward ballonet empty, and inclined up by the bow. The propeller is similar to that of _P.L. 2_. The car also is mounted on wire runners. She was originally 4,000 m cubed. capacity. Built 1908. Station: Bitterfeld. The car is at present in Deutsches Museum, Munich. PARSEVAL P.L. 2 = P. I. Military. (1908.) [Illustration] Built by the "Society for the Study of Motor Air Ships," and taken over by the German War Office. ~Length,~ 197 feet (60 m.) ~maximum diameter,~ 34 feet (10.40 m.) ~capacity,~ 111,270 cubic feet (4,000 cubic m.) ~lifting power,~ 9,200 lbs. (4,180 kgs.) ~Gas bag.~--Front end semi-ellipsoidal with semi-axes 15.4 feet (4.7 m.) and 11.8 feet (3.6 m.), from which it increases to its maximum diameter. This is maintained for about two-thirds of its length, when it begins to taper to a point at the stern. Made of 2 layers of transverse strips of rubber proofed material, crossing each other diagonally. Fitted with a tearing strip. ~Ballonets.~--One at each end, together amounting to about one-quarter of the total capacity. Owing to this disposition, the trim can be altered, and steering effected in the vertical plane by filling either more than the other. Pressure in the ballonets and gas bag, 20 mm. of water pressure. ~Motor.~--4-cylinder 85 h.p. Daimler placed at one side of the car to give more room. 1,000 to 1,200 r.p.m. ~Propellers.~--12-1/3 feet (3.75 m.) diameter, 250 to 300 r.p.m. 4-bladed, the blades being of peculiar construction. When stopped, the fabric of which they are made hangs down limply; when running, these flaps fly out under centrifugal force. ~Speed.~--27 miles per hour. 43 kilometers per hour. ~Car.--Length~, 22-1/3 feet (6.8 m.) Width 4.1 feet (1.22 m.) Made of nickel steel, U bars, screwed together so as to take the pieces rapidly. The sides are lattice girders. The whole is boat shaped and covered with canvas. Contains motor, chart table; trail rope 480 feet (146 m.) long, weighing 220 lbs. (100 kg.) Wheel for horizontal steering at the bow. 110 gal. (500 litre) cask of petrol on the girders at the after point. 41 feet (12-1/2 m.) below the gas bag. It is capable of swinging horizontally on wires running over rollers. Whereas without this device a forward swing of the car would lift the nose to a possibly dangerous extent, the free motion of the car shifts the centre of the gravity forward and so preserves stability. ~Steering.~--In vertical plane, by altering the trim. In horizontal plane, by a rudder of 80.7 sq. feet (7-1/2 m squared) immediately behind the vertical plane. Two fixed horizontal planes are placed at the rear end of the gas bag above the central line. [Illustration: PARSEVAL II.]