NRC wind tunnel: MSs of two men attaching paper streamers to model aircraft in National Research Council wind tunnel, of model in tunnel, of two men sitting at control panel, a third man looking into tunnel through glass window. MCS of man at control panel. CU of man's hand raising lever, TILT UP to control panel. Shot of two men coming out of tunnel, closing trap after them. MLS from inside tunnel, of two men leaving after preparing model for test. Various CSs of two men preparing model plane for tests in wind tunnel.