proposed canadian designed early 1950s development possible replacement company entering service time intended capable flying speeds moderate increase performance capability subsequently aircraft progressed mock stage design development prototype flown conducting studies potential advanced variations aircraft seeking greater high speed performance perceived limitations original thick straight wing chief designer proposed series included thinner swept wing december decided proceed redesign primarily incorporating early series fuselage structure new swept wing tail surfaces design study frost considered new design interim aircraft advanced project changes basic wing decreasing chord thickness adding sweep leading edge creating near delta wing configuration tail surfaces swept version considered featured streamlined fuel tanks blended leading edge wings near quarter position despite use powerful engines redesign modest performance specifications planned maximum diving speed scarcely better speed limit production executives recognizing company suffered protracted development determined frost revised design provide failure secure long term contracts issued order prototypes static test airframe project designation tools detailed engineering drawings place june wind tunnel testing conducted completed november wooden mock built separate cockpit area engine section partially framed mock feature unit interior fittings different tail designs fitted initial effort having swept leading edge tail definitive version appearance engineering installation requirements proposed jet engines finalized experimental hybrid unit stage turbine matched unit fully developed cancellation flight tests carried chief development test pilot members flight test unit revealed development potential intended performance envelope frost preoccupied sophisticated designs potential replacements work stalled maiden flight originally scheduled summer postponed cold war pressures mounting canadian government demanded production latest fighter developing advanced variants leading company project december mock experimental bay factory dramatic event served attempt restart project december height prototype unauthorized test flight resulted final scrapping mock specifications data arrow story arrow evolution extinction general characteristics crew length wingspan height powerplant dry thrust lbf thrust lbf performance maximum speed mph dive armament proposed forward firing ventral gun pack containing inch machine guns rounds machine gun
Avro Canada CF-103