Abstract:
A mobile experimental test facility has been developed to carry
out the aerodynamic evaluation of hang glider wings normally performed
in a wind tunnel.
Longitudinal aerodynamic data obtained using this facility is
presented for three modern hang glider wings, a Silhouette, Demon 175
and Magic 166, together with surface flow patterns for the latter two
wings.
The longitudinal stability criterion are studied and alternatives
established, equivalent to the stick fixed and stick free criterion for
conventional aircraft, relevant to weight shift controlled wings. These
are based on the pilot's position and control force to trim.
The aerodynamic data obtained from the mobile facility is used to
calculate these parameters and the longitudinal static stability of each
wing is examined.
The influence of several rigging parameters, variable by the pilot
before flight, on the longitudinal static stability and control of the
hang glider are also investigated.
