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The wind triangle is a vector diagram, with three vectors. The air vector represents the motion of the aircraft through the airmass. It is described by true airspeed and true heading. The wind vector represents the motion of the airmass over the ground. It is described by wind speed and the inverse of wind direction.
The mathematical formulas that equate to the results of the flight computer wind calculator are as follows: (desired course is d, ground speed is V g, heading is a, true airspeed is V a, wind direction is w, wind speed is V w. d, a and w are angles. V g, V a and V w are consistent units of speed. is approximated as 355/113 or 22/7)
The navigator plots their 9 a.m. position, indicated by the triangle, and, using their course and speed, estimates their own position at 9:30 and 10 a.m. In navigation , dead reckoning is the process of calculating the current position of a moving object by using a previously determined position, or fix , and incorporating estimates of speed ...
In the air, the flight computer can be used to calculate ground speed, estimated fuel burn and updated estimated time of arrival. The back is designed for wind correction calculations, i.e., determining how much the wind is affecting one's speed and course. One of the most useful parts of the E6B, is the technique of finding distance over time.
An alternative method is to do it graphically by using a "double-drift diagram", which is a combination of two wind triangles (see the figure). In this method, two vectors are first drawn from the center of a plane, where each vector represents one of the headings at a given airspeed (scaling factor is used, e.g., 10 cm is 100 knots).
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The pilot will use the polar curve information for the particular glider to derive the exact speeds to fly, minimum sink or maximum L/D, depending on the lift and sink conditions in which the glider is flying. A speed to fly ring (known as a 'MacCready Ring'), which is fitted around the aircraft's variometer, will indicate the optimum airspeed ...