about 34 to 29 hours
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DragonFable
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I assume you mean the normal vector in the plane of the circleIf you write the circle in the form f(x,y,z) = 0 e.g. x^2 + y^2 - r^2 = 0then grad(f) gives you the normal vector (outward pointing). In cartesian (x,y,z) coordinates:grad(f) = (df/dx, df/dy, df/dz)So in our example:grad(f) = (2x, 2y, 0)This is the normal vector and is necessarily in the plane of the circle, even if this method is followed for a circle with some angle to the x-y plane :)This works for any function of the form f(...) = 0, not just circles...
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The answer will depend on what DF is!
My Df 2.5 runs about 1 hour on full throttle. At low speeds it runs approx. 2-3 hours.
DF is not a valid ISO-3166-1 country code. There is no top-level Internet domain .df
As far as I know ... The Adcock DF works with signals, which are reflected at the ionosphere and with ground wave signals ... the loop antenna works only wich ground wave signals, not with bounced signals from ionosphere ... and, by the way, the Doppler DF works also only with ground wave signals ... so for long distance DF at shortwave, the best (and only good) working DF ist the Adcock system ... sorry about my poor english :) Dietmar, DL4HAO