1. MMM Flash

2. Looking for Sympo Info

3. Radio in flight

4. Others did it by Radio

The problem Chuck Markos reports seems to be based on the metal low-wing
airplane used. I know of several instances of  retrieval flights using
composite or shoulder wing (metal) airplanes or open cockpit Ultralights
where the transmitter of the grounded model could be readily identified,
and - using the start / end of signal reception and a follow up at approx
the center of this line at 90° would allow to narrow down the position of
the plane quite closely, even if it still could not be seen.
A non-directional antenna was always used in the aitrplane, and the position
of this antenna should be kept the same after first signal reception to
minimize shadowing / reflection errors.

The Ruyter system in the 145..MHz range was always used, but Walston should
not be different. Headphones advisable, as airplanes are noisy!
Better succes on your next search ... even better, not to have to search at
all!

Greetings from overseas where cheap, plastic airplanes are more common than
the metal types ...

Your faithful Austrian
Klaus W. Salzer