A Radio-controlled helicopter (also RC helicopter) is model aircraft which stands out from a RC airplane because of the differences in building, aerodynamics, and also flight training. Several fundamental designs of RC helicopters exist, of which some (such as those with a cumulative pitch control) are extra maneuverable than others. The even more maneuverable layouts are typically harder to fly, yet gain from higher aerobatic abilities. 
Trip controls allow pilots to manage the collective (or throttle, on fixed pitch helicopters), the cyclic controls (pitch and also roll), as well as the tail blades (yaw).  Managing these together allows the helicopter to do the very same maneuvers as full-sized helicopters, such as floating as well as backwards trip, and also numerous other maneuvers that full-sized helicopters can not, such as upside down flights (where cumulative pitch control gives negative blade pitch to hold heli up inverted, and also pitch/yaw controls have to be reversed by the pilot).