It's truly amazing to see the evolution of R/C over the years. My first R/C model was a Trixter Beam powered by an OK Cub .14 glow plug engine. The radio unit was a single channel Berkeley Super Aerotrol with a wound-up rubber band to turn the escapement. Push the button once and the rudder went to one side. Let off and it returned to neutral. Next push was to the other side. Rudder only! This was around 1950. Soon, all the control line guys started building R/C models. I might be the only one of our model group left. Fond memories. As somebody deep into the hobby of RC aircraft once told me after watching his beautiful F4 Corsair nosedive into the pavement, "Son, if you can't afford to wreck'em, your in the wrong hobby" which is why I do model trains. I have since discovered that statement applies to motorsports as well.