Apparent wind that measures wind speed in knots and wind direction in degrees relative to the heading of the boat. Modern instrumentation can calculate the true wind velocity when the apparent wind and boat speed and direction are input. In sailboat racing, and especially in speed sailing, apparent wind is a vital factor, when determining the points of sail a sailboat can effectively travel in. A vessel traveling at increasing speed relative to the "prevailing wind" will encounter the wind driving the sail at a decreasing angle and increasing velocity. Eventually, the increased drag and diminished degree of efficiency of a sail
Speed of the Wind by bombing during World War II. Meccano, produced a model of the car as Dinky Toys, both pre- and post-war. Tommy Doo Toys and Johillco also produced a model of this car. The Dinky Toys Encyclopaedia. Two photographs in the Brooklands photo archive show it outside Delaney & Sons. garage, a popular location for racing in this era In both photographs, George Eyston is standing at the far left. A third photograph is likely to be the same location. Speed of the Wind Speed of the Wind was a record-breaking car of the 1930s, built for and driven by Captain