A UK Apache Helicopter conducts a maneuver on approach to land at Duxford airfield as part of Helitech 2011. During such maneuvers, the rotor disk is highly loaded, and the vorticity in the core of the tip vortices is particularly strong. This leads to a lowering of the pressure hence temperature of the air in the vortex core. If the temperature falls below the dew point of the air, the water vapor condenses, spectacularly visualizing the rotor tip path, as shown here. Photo taken by Dr. Nicholas Bojdo.
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UK Apache at Helitech 2011

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A UK Apache Helicopter conducts a maneuver on approach to land at Duxford airfield as part of Helitech 2011. During such maneuvers, the rotor disk is highly loaded, and the vorticity in the core of the tip vortices is particularly strong. This leads to a lowering of the pressure hence temperature of the air in the vortex core. If the temperature falls below the dew point of the air, the water vapor condenses, spectacularly visualizing the rotor tip path, as shown here.

Photo taken by Dr. Nicholas Bojdo.

 

Caricato in — 7 anni fa

 

License: Creative Commons Attribution-ShareAlike

 

NIKON CORPORATION NIKON D300 1/6400s ƒ/4.5 ISO400 70mm — Altro Exif dati

  • Manufacturer NIKON CORPORATION
  • Model NIKON D300
  • Exposure Time 1/6400s
  • Aperture ƒ/4.5
  • ISO 400
  • Focal Length 70mm
  • Resolution Unit inches
  • Sensing Method One-chip color area
  • Scene Capture Type Standard
  • Gain Control Low gain up
  • Exposure Program Aperture-priority AE
  • Exposure Mode Auto
  • Metering Mode Multi-segment
  • Light Source Unknown
  • Flash No Flash
  • White Balance Auto
  • Contrast Normal
  • Saturation Normal
  • Sharpness Normal

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