 | Electric Mini Helicopter -X.R.B. By Hirobo Until now, the X-rotation blades system, while having such excellent features, has been adopted in only a few cases of actual machines and radio controls for reasons such that construction becomes complicated and that maintainability and operability are inferior to other systems. In the cases of indoor flight helicopters, high-speed flights and stunt performance are not necessarily required. From the conclusion that pursuit of stable hovering, precise movements and safety is advantageous in total consideration even if the above are sacrificed, developments have pushed ahead. |