11. When wind velocity exceeds ideal conditions, the blades pitch back to protect the equipment. 12. Minor changes in wind velocity often ruined a day's shooting. 13. Wind velocity ( / WV ) must contain both the wind speed and direction.14. Wall panels hold a barometer, thermometer and wind velocity indicator, connected to rooftop instruments. 15. Lone Star needs a device to measure wind velocity , like other quarter-horse tracks have. 16. Rapid changes of wind velocity over short distances are a prime producer of turbulence. 17. The tower has been designed for a wind velocity of 160 km / h. 18. Storm wind velocities ( greater than 40 km / h ) occur, but rarely. 19. "U " 4 is introduced here as the wind velocity in the far wake. 20. Below some minimum wind velocity , no useful power output can be produced from wind turbine.
