Investigation into the Effect of Canard Location on the Aerodynamics of the Close-Coupled Canard Configuration

摘要

The aerodynamic interaction of a 50 deg swept back, truncated delta wing and a swept back close-coupled canard was investigated. The all-moving canard had an area of 13.5 percent of the wing area, and its relative position with the wing could be varied from -10 to +20 percent of the wing root chord longitudinally and between 0 and 20 percent normally with respect to the leading edge of the wing. Force measurements were taken for the wing and canard individually in each configuration at a wind speed of 40 m/sec. Results show that aerodynamic interference decreases with increasing longitudinal separation, but the effect of increased normal separation is inconclusive. The total lift of the configurations is only found to be enhanced at very high angles of attack. It must be noted, however, that any effects are small, with the wing C sub L only varying by 5 over the range of positions.