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Author: Herbert S. Appleman
Publisher:
ISBN:
Category : Fog
Languages : en
Pages : 10
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Book Description
Author: Herbert S. Appleman
Publisher:
ISBN:
Category : Fog
Languages : en
Pages : 10
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Book Description
Author: Herbert S. Appleman
Publisher:
ISBN:
Category : Dry ice
Languages : en
Pages : 10
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Book Description
In the winter of 1967-1968, the Air Weather Service (AWS) carried out its first operational weather-modification program at Elmendorf AFB. An AWS weather-reconnaissance aircraft (WC-130E) was used to seed supercooled fog with dry ice. A prescribed flight path was flown a specified distance upwind from the target area, and crushed dry ice disseminated at rates of 12.5 or 25 pounds per mile. It was found that a clearing generally occurred in 30 to 45 minutes. The only real failure occurred in a case that may have been an ice fog; in addition, proper positioning of the hole proved to be a major problem throughout the program. Despite these difficulties, an estimated 200 successful take-offs and landings were made using the artificially produced clearings. Supplemental tests were carried out using airborne liquid CO2 dispensers and silver iodide pyrotechnics.
Author: Alan Eddy
Publisher:
ISBN:
Category :
Languages : en
Pages : 157
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Book Description
Results are presented of an experimental study of the dissipation of supercooled fog and stratiform clouds by an airborne dry-ice dispenser. The ultimate purpose is to provide the Air Force with an operational capability of dissipating supercooled clouds by dispensing dry-ice pellets made on board the seeding aircraft and dispensed at will to create holes in the cloud layer of specific size for particular missions. Experiments are designed, flown, and analysed to determine what variables, either controllable or uncontrollable, are influencing the experiments and which of these variables must be considered in the design of equipment. The final results indicate that cloud liquid-water content and turbulence are two uncontrollable variables influencing the experiment. The trial range used for controllable variables was higher than the critical minimums sought. The experiments show that a simple emergency dispenser for all aircraft appears feasible for cloud decks less than 1,000 feet thick. A more sophisticated model with a single size pellet-making ability and 300-lb liquid CO2 capacity should be designed for airport duty aircraft. (Author).
Author: United States. Air Weather Service
Publisher:
ISBN:
Category : Meteorology in aeronautics
Languages : en
Pages : 572
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Book Description
Author: United States. Air Weather Service
Publisher:
ISBN:
Category : Meteorology in aeronautics
Languages : en
Pages : 1056
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Book Description
Author: Bernard A. Silverman
Publisher:
ISBN:
Category : Evaporation
Languages : en
Pages : 56
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Book Description
The report is a comprehensive review of fog modification. It includes discussions of the physical structure and climatological characteristics of various types of fog. The three different methods of fog modification, that is, removal, evaporation and prevention are discussed, as are the general requirements of fog dispersal. In depth descriptions are given of the techniques used to modify supercooled, warm, and ice fog. (Author).
Author:
Publisher:
ISBN:
Category : Weather control
Languages : en
Pages : 184
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Book Description
Author: Herbert S. Appleman
Publisher:
ISBN:
Category : Weather control
Languages : en
Pages : 44
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Author: National Science Foundation (U.S.)
Publisher:
ISBN:
Category : Weather control
Languages : en
Pages : 88
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1072
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Book Description
