Now young and old alike can be armchair helicopter pilots -- and watch their own flying. At remote controls, just like a real helicopter's, they can take off, hover, turn, bank, fly forward and back and land; do all the manoeuvers that can be performed in the air.   Within its sturdy plexiglass bubble the finely balanced Jaycopter is electrically coupled to the pilot controls, adjusted so that rough or violent movements by children or inexperienced 'pilots' will not cause any damage. Every movement of the 'cyclic stick' and 'collective pitch control lever' will be instantaneously transferred to the model and it will react accordingly. All the problems of actual flight will be encountered (except crashes), and may be solved as experience is gained. Mastering the art of flying the remote controlled Jaycopter will mean a greater appreciation and understanding of flight in the large passenger-carrying Jaycopter, the next step toward free flight.