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  1. 1. Windsocks Flying Camp: Basic/Proficiency/advanced CUO Tonya Brown Apr 11
  2. 2. Aims <ul><li>Learn the basic facts of windsock </li></ul><ul><ul><li>You will have the ability to understand and interpret windsocks when you are flying. </li></ul></ul><ul><li>Make your own model windsock </li></ul>
  3. 3. Purpose of Windsock <ul><li>Help aviators know the direction and speed of the wind </li></ul><ul><li>Now commonly seen as decoration </li></ul>
  4. 4. What are Windsocks? <ul><li>Made out of fabric (cotton/nylon/synthetic material) </li></ul><ul><li>Sewn around hollow circular frame </li></ul><ul><li>Shaped so when wind blows through them they take form of a cone </li></ul>
  5. 5. Function at Airports <ul><li>Travels freely around poles </li></ul><ul><li>Provides quick visual indicator to aviators and control tower operators </li></ul><ul><li>Mounted near airport runways </li></ul><ul><li>Most have lights mounted on poles – to be seen at night </li></ul><ul><li>Critical real-time information </li></ul><ul><li>Important piece for pilots landing or taking off </li></ul>
  6. 6. Visibilty <ul><li>Designed to be highly visible </li></ul><ul><li>Normally brightly coloured </li></ul><ul><li>Stripes usually show indication of wind speed (in terms of fractions of the sock) </li></ul>
  7. 7. Wind Direction <ul><li>Wind direction is opposite of the way windsock is pointing </li></ul><ul><li>Windsock pointing ease indicates westerly wind </li></ul>
  8. 8. How to interpret windsock <ul><li>Check to see whether wind is hard enough to cause windsock to orientate itself in the direction of wind blowing </li></ul><ul><li>3 knots usually speed to move </li></ul><ul><li>View direction that windsock is pointing (wind direction opposite) </li></ul><ul><li>Look at angle – 15 knots usually will extend to 90 degrees </li></ul>
  9. 9. Windsock Extension <ul><li>90 degrees 15 knots or greater (30) </li></ul><ul><li>45 degrees 7-8 knots (13-15) </li></ul><ul><li>20 degrees 3-4 knots (6-7) </li></ul><ul><li>60 degrees 10-11 knots (18-20) </li></ul>
  10. 11. Converting Knots & Km/h <ul><li>1 knots = 1.852km/h </li></ul><ul><li>1 km/h = 0.5399 knots </li></ul><ul><li>15 knots = 27.77998 km/h </li></ul><ul><li>Z knots = 1.852 x Z (knots to km/h) </li></ul><ul><li>Y km/h = 0.5399 x Y (km/h to knots) </li></ul>
  11. 12. Colours of Windsocks <ul><li>Usually brightly coloured - visibility </li></ul><ul><li>Black and yellow - usually safety - evacuation lanes, chemical storage </li></ul><ul><li>Orange and white - heliports, air traffic situations </li></ul><ul><li>Only one windsock usually needed for airfield </li></ul>
  12. 13. Make a Model Windsock <ul><li>Refer to Activity Sheet </li></ul>