. Discovery. Science. FIG. I.—" SAUS.\GE " B.\I,I-00X (DR.\CHEN'). with a conical-shaped tail filled with air, to which a rudder and stabilising fins are attached. The French balloon, however, is the most important and most widely used. It is the standard for the Naval and Military Services of England and France. The streamline form for a kite balloon is rather bluff ( not sharp-pointed at the ends) and short compared with an airship. The latter has its centre of buoyancy, or central point of the lifting effort of the gas, immediately above the car. This allows a finer nose on th
. Discovery. Science. FIG. I.—" SAUS.\GE " B.\I,I-00X (DR.\CHEN'). with a conical-shaped tail filled with air, to which a rudder and stabilising fins are attached. The French balloon, however, is the most important and most widely used. It is the standard for the Naval and Military Services of England and France. The streamline form for a kite balloon is rather bluff ( not sharp-pointed at the ends) and short compared with an airship. The latter has its centre of buoyancy, or central point of the lifting effort of the gas, immediately above the car. This allows a finer nose on the streamline. Conditions are different in the case of the kite balloon. Here the greater part. no. 5— BAI,I,00N (C.\QUOT). of the gas-hfting force is required to lift the cable, and bear the tension on the cable due to the wind forces on^thc balloon. A large amount of buoyancy is there- fore needed about the nose, where the cable suspensions arc attached, and that is why the balloon is given a " bluff " nose. On the right-hand side of the balloon in Fig. 2 are seen the air-filled stabilising fins and the rudder. To these large fins the kite balloon owes much of its success. Kite balloons, like airships, are provided with an internal air-chamber or " ; The function of the ballonet is to keep the balloon rigid, and to pro\'ide an automatic means of operating the valve which re- leases the hydrogen from the envelope as the balloon ascends. A kite balloon of capacity 35,000 cubic feet can be flown at altitudes up to 6,000 feet, carrying two ob- servers. Such a balloon is about 91 feet long, and is the type used for " spotting " enemy batteries and for controUing gun-fire in military operations. For naval work, and for operations where great altitude is not of importance, a slightly smaller balloon has. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - col
Size: 1569px × 1592px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookleafnumber112, booksponsoruniversityofto, booksubjectscience
