Performance Evaluation of Full Scale On-board Active Flap System in Transonic Wind Tunnel

JAXA started the research and development program of the full scale active flap. As the first step, the conceptual study of the active flap system was carried out and the full scale on-board active flap system was developed and demonstrated its operability by the bench test so far. In the second step described in this paper, a transonic wind tunnel test is performed on the condition to cover simulated several flight patterns such as landing/approach, hover, assumed maximum cruising speed of a helicopter in order to demonstrate the proper operability of the active flap system on more realistic environment. It is shown by this test that the active flap system achieved the target value 6deg amplitude on aerodynamically simulated BVI flight condition.