22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-1.8.1

EXPERIMENTAL STUDY OF NO TAIL ROTOR (NOTAR) HELICOPTER

Luo X., Zhang C., Wang H.
Nanjing University of Aeronautics and Astronautics, PRC

Keywords: helicopter, tail rotor, notar

In order to study the new anti-torque system on helicopter circulation control tail boom, two helicopter models with circulation control tailboom was designed and tested to measure the pressure distribution on tail boom surface with the model in tunnel and under rotor respectively. The main purpose of the test was to study the effect of the momentum coefficient, the slot's geometry variables and the flying velocity on the aerodynamic forces of the circulation control tailboom. The aerodynamic forces on the tailboom have been calculated and their changes with the circulation control variables were drawn in curves. By discussing the test results, circulation control and its application was studied. Reasonable explanations have been given about the test results and some new conclusions have been obtained.

view full paper