A friend and fellow RC'er uses the throttle servo arm to put out a short rod out the side of his pattern plane to indicate where the throttle is. (the engine is inverted and inside a cowl). He just uses the perpendicular throttle arm with one arm going to the throttle and the other with a rod that simply exits out the side of the fuselage. When the throttle is closed, the rod is further out. When he operates the throttle, the rod follows the servo arm and slides in. He has little marks on the rod to show where the throttle is.

I would imagine that such an arrangement could be used to couple some linkage up to the 'pilot' in the cockpit that will swivel the pilot's head. Of course, you will have to figure out some way to detach the head from the shoulders and make a device that will allow the head to move... or you can mount the entire pilot to a platform and have the whole pilot turn or rotate.

You will have to deal with vibration with whatever you decide to do, and of course, the added weight of whatever mechanism you design that will swivle the head or shoulders.

But, I would imagine that this has been done before and there is no sense in re-inventing the wheel here, I would bet RC Ken or MinnFlyer has some solution to this.

DS.