Whitmarsh, G. E.2013-03-132013-03-131955-07http://dspace.lib.cranfield.ac.uk/handle/1826/7858Measurements have been made of the derivative Zw for rigid sweptback wings mounted at zero incidence and oscillated with simple harmonic motion. The Reynolds number was in the range 1.2 x 105 to 4.1 x 105.enReport