Hi!

How feasible would it be to replace the pylons that are used in F3B and F3F, with automated radio pylons? Are there any projects or attempts in this direction? Quick googling did not give any results.

I thought about system where each plane has a transmitter with unique code and at the pylon locations are highly directional receiver antennaes with 3D polars that look like pancakes. When plane flies through the pancake the signal strength peaks and this is signalled back to pilot. What kind of antennae would give this kind of polar? What would be a reasonable maximum working distance for this kind of system?

regards,
Arne
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