The applicability of a V-type empennage on an unpowered semiscale helicopter fuselage is considered as design criteria for improved directional control devices. Configuration changes included variations of V-tail dihedral angle, planform area, and incidence angle. Of the configurations tested, a V-tail with a dihedral angle of 55 deg, a total planform area of 0.244 sq cm, and an incidence angle of 5 deg most nearly match the trim and static stability of the baseline conventional empennage. Design optimization of empennage configuration for helicopter stability and control at cruise speed; the variables include dimensions, angle of attack, longitudinal characteristics, planform, fuselage, and lateral directional characteristics; 10 figures and no tables.
Wind Tunnel Investigation of an Unpowered Helicopter Fuselage Model with a V-Type Empennage
1977
54 pages
Report
Keine Angabe
Englisch