Your radio only becomes an issue if you want to activate the release mechanism with a seperate channel!!!!

If you chose to use an existing channel (i.e. rudder or throtle) then there is no problem however you do have to become a little creative when setting up the release.

FlyingZee suggestion is simple and easy to do. try it first and then get into a more complex release afterwoods.

BTW make sure you have a spotter whose job it is to watch the "jumper" while YOU concentrate on the plane (guess how I came by this little piece of knowledge )