ADF / VOR formulas

NDB-ADF

ADF time / dist formula:
    Time in seconds for bearing change / Degrees of bearing change = time to station in minutes

Can tune into AM radio

ADF Bearing / turning formulas:
MH = magnetic heading of aircraft
RB = Relative bearing of NDB / VOR from aircraft (always turning right?)
MBto  = MH + RB
MBfrom = MBto +- 180

ADFs point to thunderstorms
ADFs are circle / line antennas, now are a teardrop
ADF leads / lags in a turn

VOR

Is the phase difference between two signals, think of a strobe light and a beacon
108.1 - 117.95
Interference free, mostly
Interference can be caused by FM, cell phones, calculators

1.23 * sqrt(height AGL) = reception distance in nm you can recieve VOR signals

Accurate up to 50nm

Antenna is V on tail
Receiver has OBS on it. Must be set by indicator.

Testing 2 VOR's, must be within 4º of each other when set to same radial.

Testing 1 VOR - done over landmark, must be within 6º, must be on a published radial to test.

Turn towards radial to align.

Set the Receiver to the direction the plane is flying, using reciprocals will make things confusing.


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