Originally Posted by
Supernumerary
Without using a calculator (trig functions):
Does anyone know the quick mental-formula for determining the heading required to proceed from one point in space to another point in space when navigating off a single VOR?
Example:
What heading is required to go directly from the 090 radial 20 DME fix - to the 180 radial 70 DME fix?
I am at a total loss...?
The method we used to teach on aircraft equipped with RMIs was to use per your example the 180/70 as the full face of the instrument and the 90/20 as a smaller proportional leg-now draw an imaginary line or use a straight edge(paper) between the two points, now slide that line to the center of the instrument and there is your heading. Refine repeatedly as you steer to the point.
No RMI? You can do the same thing on the back of a whiz wheel(the wind side)- set current heading, mark 180/70 and 90/20 in proportion and then note the heading from the current position to the desired position, slide the line to the center of the wheel. Refine solution as you continue to steer to the point.