AIR FORCE PLANNING GROUND BASED AND AIRBORNE FOG DISSIPATION TESTS

THE AIR WEATHER SERVICE OF THE AIR FORCE WILL TEST ONE AIRBORNE AND FOUR GROUND-BASED METHODS FOR DISSIPATING SUPERCOOLED FOG AROUND AIRPORTS. THE AIRBORNE SCHEME WILL CONSIST OF SEEDING FOG LAYERS WITH CRUSHED DRY ICE. THE CRUSHED ICE RANGING FROM POWDER TO BB IN SIZE, WILL BE RELEASED AT THE TOP OF THE FOG LAYER IN THE CASE OF THIN FOGS, AND AT THE 300-FT. MARK IN THICK FOGS. A SEEDING RATE OF TWENTY-FIVE POUNDS PER MILE WILL BE USED. THE FOUR GROUND-BASED FOG DISSIPATION SCHEMES TO BE TESTED ARE: (1) PROJECT WARM FOG WHICH IS AN EMERGENCY TECHNIQUE USING THE HEAT FROM JET ENGINES TO BURN FOG OFF A RUNWAY, (2) PROJECT FOG FAN USES A TANK OF LIQUID CARBON DIOXIDE MOUNTED BELOW A VERTICALLY-ORIENTED PROPELLER ON A TRAILER, (3) PROJECT FOG WAND IS SIMILAR TO PROJECT FAN BUT DOES NOT USE A PROPELLER TO DISSEMINATE THE ICE CRYSTALS, INSTEAD THE LIQUID CARBON DIOXIDE IS VENTED DIRECTLY INTO THE FOG AND THE ATMOSPHERE, AND (4) PROJECT COLD FOG IS A DERIVATION OF THE BALLOON TECHNIQUE TESTED IN OTHER PROJECT COLD FOGS WHICH WILL USE FIVE TETHERED BALLOONS SPACED AT 1000 FT. INTERVALS WITH FOUR DRY-ICE CAKES PER BALLOON.

• Corporate Authors:

  Air Weather Service, Air Force /US

  Scott AFB, IL  United States 
• Publication Date: 1967-11-6

Subject/Index Terms

• TRT Terms: Aircraft; Balloons; Carbon dioxide; Fog dispersal; Gas turbines; Heat; Liquefied gases; Turbine engines
• Uncontrolled Terms: Dry ice
• Subject Areas: Aviation; Highways; Maintenance and Preservation; Vehicles and Equipment;

Filing Info

• Accession Number: 00218241
• Record Type: Publication
• Source Agency: Washington Science Trends
• Files: TRIS
• Created Date: Aug 10 2004 5:26PM