I have read the arguments about range between 72mhz and 2.4g radio. I have no hard data but my own two eyes. I have yet to fly beyond the limits of my eyes with either 72mhz and 2.4g radios. I have a plane we use to lift sailplanes up. We go as high as we can safely see them. When a 2.3 meter wing span sailplane sitting on top of a 90 sized low wing plane, looks like a tiny dot, you know you have distance between the Tx and Rx. We were flying Airtronics RD6000 72mhz, RD80000 2.4g and a budget 9x 2.4g. We never lost any type of control with either radio. If you need to fly farther away then that, you will need binoculars and some one doing serious spotting.

Just my experience.

Buzz.