. 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 " ballonet.
. 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
Size: 2219px × 2252px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookleafnumber112, booksponsoruniversityofto, booksubjectscience
