Alright, in that case, just throw an encoder onto the LS and you're good to go.
Basically you implement a PID loop and play around with the P, I, and D constants until it does what you want. Keep in mind though that a finely tuned PID loop goes whack when there's strong wind coming in from random directions. When it comes to small flying vehicles in wind, it often shouldn't even point in the direction you want it to travel! Look up papers that say stuff like 'control of a micro-auv'.
You'll have to get a big fan to simulate winds and see how your control system responds to major disturbances.
ps - If you use WebbotLib, it has easy to use libraries for PID and quadrature encoders.
Thank you so much for your help admin
Sadly I do not use the ATm microcontroller
Using PIC instead. But should not be too much of a problem for me.
Another quick question, a rotary encoder uses a coding scheme to match a certain angular position. I was wondering how you can mount the encoder onto the LS itself along with the coding scheme?