First let's thank the inventor of Spread Spectum - Actress Heddy Lamar in the 40's. She came up with the original concept of Frequency Hopping. Then let's add the guys that came up with the psuedo-code systems.

For a system to work properly, there ARE a number of technical issues, but electronics has also covered a large distance since I last worked on one of these systems. You will still have problems with phase jitter in the oscillators (on both ends) and differential group delay in filters. But after that, the signals can be processed with DSP technology. And that is an area where costs are down and processing power is beyond belief.

A SS system would really add to safety and be a welcomed addition to events like pylon racing and large contests. The pin system depends on humans to work, and that is it's problem. I have been sent to the line to race three others, and once one of the other guys was on the same frequency. I took off and was getting glitches in the air, while his airplane nosed over. (It's good to have a strong signal). Human error on the part of the contest. And this was a very well run contest with many years of experience. The only frequency error that had been made in over 15 years, yet it could have killed somebody. 180+ MPH airplanes have enormous kinetic energy, more than "dirty Harry" had in his hand