This paper discusses active wing shaping control strategies for an elastic aircraft, with highly flexible wings. The objective of in-flight wing shaping is to ensure that the local angle of attack distribution on the wing is optimal at every flight condition so as to result in reduced drag during cruise. The wings are constructed using lightweight materials as a means to reduce aircraft weight - use of such materials ensures that strength and durability is retained, but results in reduced structural rigidity. This increase in structural flexibility leads to a significant increase in the effects of aeroelastic interaction forces and moments, which can lead to important aircraft stability and control issues.