twirapI can't help you out with the torque calculation. But I know about RC.RC is easier in real life then explained in writing. When you buy a set you have 3 components1) the rc sender (transmitter)2) the rc receiver3) the crystalThe sender comes in many shapes but from a RC point of view there is the number of channels which is important.You can probably do smart things with the channels but from a starter point of view read channels as follows: 1 channel = 1 servo or 1 arduino pin = 1 remote controlled number (using pulseIn)The receiver is made for servo's. So you can plug in your servo directly in the receiver and the servo will move as controlled by you sender. If you connect the PWM pin to a arduino pin you can read the pwm value and ....(basically do what you need it to do)Don't forget that you need to power the receiver or nothing will work. For each channel there is a 3 pin connector (the one that fits your servo) and there iis one extra where you need to apply + and - on the same pins your servo needs + and -. If there are more they probably work but your sender will not send signals.In a good receiver you can not plug in the servo the wrong way; this way you know where to apply + and -.The crystal decides on the frequency you play with. If you need multiple sender receiver pairs you will have to use different crystals.That's all that is to it (for the start).Best regardsJantje
Thank you both of you for the help! I will post details and question updating this thread as I go. Jantje with the crystal information you provide it makes sense to me....... I am going to give rc lawn mower a try or perhaps an rc plane....whichever is easier for a first rc project.