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Experiments On The Dissipation Of Warm Fog By Helicopter Induced Air Exchange Over Thule Ab Greenland
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Book Synopsis Experiments on the Dissipation of Warm Fog by Helicopter-induced Air Exchange Over Thule AB, Greenland by : James R. Hicks
Download or read book Experiments on the Dissipation of Warm Fog by Helicopter-induced Air Exchange Over Thule AB, Greenland written by James R. Hicks and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experiments on the Dissipation of Warm Fog by Helicopter-induced Air Exchange Over Thule AB, Greenland by : J. R. Hicks
Download or read book Experiments on the Dissipation of Warm Fog by Helicopter-induced Air Exchange Over Thule AB, Greenland written by J. R. Hicks and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experiments on the Dissipation of Warm Fog by Helicopter-induced Air Exchange Over Thule Afb Greenland by : James R. Hicks
Download or read book Experiments on the Dissipation of Warm Fog by Helicopter-induced Air Exchange Over Thule Afb Greenland written by James R. Hicks and published by . This book was released on 1965 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests have demonstrated that certain types of shallow fogs can be dispersed by the downwash created by helicopters flying at near-hovering airspeeds at altitudes a few feet above the top of the fog. One helicopter can clear an area about 75 yards wide by a mile long every 10-15 minutes. This system requires unsafe flying techniques, i.e., near-hovering airspeeds during which time the helicopter is operating at almost full power, low altitudes and positions where an engine failure would probably result in a crash since the aircraft would have to descend through the fog to an unknown landing area. Therefore, this technique is recommended for emergency use only. (Author).
Book Synopsis Experiments on the Dissipation of Warm Fog by Holicopter-induced Air Exchange Over Thule Ab Greenland by : John Hicks
Download or read book Experiments on the Dissipation of Warm Fog by Holicopter-induced Air Exchange Over Thule Ab Greenland written by John Hicks and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ice Fog Modification by Use of Helicopters by : James R. Hicks
Download or read book Ice Fog Modification by Use of Helicopters written by James R. Hicks and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objects of the report are to increase the knowledge of the physical and optical properties of ice fog and to develop techniques for its dispersal. Two series of flight tests to determine the effects of CH-47 helicopter downwash on ice fog were conducted near Ft. Wainwright, Alaska, in January 1971. During the first series, clearings were produced which were large enough for helicopter operations. This series of tests was conducted when the ice fog was in a dissipating state. The second series of tests was conducted in a denser ice fog during its developing stage. The same flight procedures were used, but clearings were not produced. (Author).
Book Synopsis Technical Report - Air Weather Service by : United States. Air Weather Service
Download or read book Technical Report - Air Weather Service written by United States. Air Weather Service and published by . This book was released on 1972 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fog Modification by Use of Helicopters by : Vernon G. Plank
Download or read book Fog Modification by Use of Helicopters written by Vernon G. Plank and published by . This book was released on 1970 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of helicopter clearing experiments conducted at the Greenbrier Valley Airport, Lewisburg, West Virginia, during the period 7 to 29 Sep 1969, are presented and discussed. Thirty-five hover experiments and runway- clearing experiments were performed on 10 separate days with fog layers ranging from 125 to 525 ft in depth. The hover experiments, which were successful in virtually all cases, yielded clearings that varied from 400 to 2800 ft in length extent. The largest clearings occurred with the shallowest fog during tests conducted within one hour or so of the natural dissipation time of the fog. The runway-clearing experiments were successful in clearing the full 6000 ft extent of the runway on two occasions, were partially successful on four occasions and were unsuccessful on 12 occasions. Six helicopter landings were accomplished through artificially-created clearings. Quantitative information is described concerning the wake penetration distances of the helicopters, the steady-state clearing times, the total entrainment (mixing) values and the persistence times of the clearings following helicopter departure from the test sites. The temperature, humidity and wind speed values within the cleared zones are also given for certain of the experiments.
Download or read book Technical Report written by and published by . This book was released on 1966 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SIPRE Report written by and published by . This book was released on with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fifth Annual Survey Report on the Air Weather Service WEA Modification Program by : Herbert S. Appleman
Download or read book Fifth Annual Survey Report on the Air Weather Service WEA Modification Program written by Herbert S. Appleman and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ENVPREDRSCHFAC Technical Paper by : Environmental Prediction Research Facility (U.S.)
Download or read book ENVPREDRSCHFAC Technical Paper written by Environmental Prediction Research Facility (U.S.) and published by . This book was released on 1974 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improving Visibility During Periods of Supercooled Fog by : James R. Hicks
Download or read book Improving Visibility During Periods of Supercooled Fog written by James R. Hicks and published by . This book was released on 1966 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six tests of dispersal systems using propane were conducted in Hanover, New Hampshire during winter 1964-65 and a like number in Greenland during summer 1965 mainly on supercooled fogs and in a few instances when air temperatures were within the lower 2 meters at or slightly above freezing. Propane was introduced into the fog as a liquid aerosol to induce spontaneous nucleation either by cooling or by clathrate reaction which may be important in fog modification. The tests show that liquid propane will improve visibility in fogs, is safe to use, and no standby time is needed. The system may be permanently installed with either radio or manually controlled valve units, and is inexpensive, a cost of $20/hr estimated to keep an airport approach zone clear of fog. Details of the individual tests conducted are given. The dispensing apparatus, propane flammability tests, and the theory of formation, growth, and precipitation of ice crystals, thermal reaction, and the clathrate concept are discussed. (Author).
Book Synopsis Research Report - Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory by :
Download or read book Research Report - Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory written by and published by . This book was released on 1968 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications, Cumulative Index by : United States. Superintendent of Documents
Download or read book Monthly Catalog of United States Government Publications, Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1970 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CRREL Technical Publications, 1950-1975 by : Cold Regions Research and Engineering Laboratory (U.S.)
Download or read book CRREL Technical Publications, 1950-1975 written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1992 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Twelfth Interagency Conference on Weather Modification, October 27-30, 1970, Virginia Beach, Virginia by :
Download or read book Proceedings of the Twelfth Interagency Conference on Weather Modification, October 27-30, 1970, Virginia Beach, Virginia written by and published by . This book was released on 1970 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
