S. F. J. Butler

• A moving-belt rig for ground simulation in low-speed wind tunnels
• Current tests on laminar-boundary-layer control by suction through perforations
• Low-speed wind-tunnel tests on a delta-wing aircraft model (S.R. 177) with blowing over the trailing-edge flaps and ailerons
• Low-speed wind-tunnel tests on a wing-fuselage model with area suction through perforations at the leading-edge flap knee
• Six-component low-speed tunnel tests of jet-flap complete models with variation of aspect ratio, dihedral, and sweepback, including the influence of ground proximity