Testing the boundaries

PA474 AT CRANFIELD When the British aviation industry started serious investigation into how laminar flow could be maintained in the boundary layer around a new generation of aircraft, it turned to an old one: Avro Lancaster PA474. As things turned out, its time with the Cranfield College of Aeronautics contributed much to its survival Lancaster PA474 in the summer of 1956, flying with the College of Aeronautics’ experimental 45°-swept wing in the dorsal position. The aircraft retained the faired-over front