Shape memory alloy adjustable camber (SMAAC) control surfaces

The SMAAC control surface concept is an adjustable camber foil which isactuated by shape memory alloy wires to control flight of hydrodynamic or aerodynamicvehicles. An operational model of a SMAAC control surface was fabricated anddemonstrated in a water tunnel. Lift measurements in the water tunnel indicated that theSMAAC foil produces 40% higher lift force than rigid foils at.the same angle of attack.Flow visualization showed that the wake behind a SMAAC foil was a factor of 3 smallerthan the rigid foil at equivalent lift. The next generation SMAAC design is presented.