N9594 was an Avro Bison Mk I, last noted with 423 Flt aboard HMS Eagle in the Mediterranean by March 1928 until March 1929 coded ‘27’. The note against this in Air Britain’s Fleet Air Arm Aircraft, Units and Ships 1920 to 1939 states: “Believed to be the aircraft coded ‘5’ which crashed in the sea on pilotless aircraft tests from HMS Courageous on 26 July 1929 (but N9592 also suggested)”. Your photos seem to confirm N9594.