The Year of '33
The years aircraft: The Supermarine S.6b
April 3 Two British aircraft, the Westland PV-3 and Westland PV-6 piloted by Squadron Leader the Marquess of Clydesdale and Flight Lieutenant David MacIntyre, make the first flight over Mount Everest, sponsored by Lucy, Lady Houston.
The Royal Air Force reinstates the squadron of nine to 12 planes as the basic organizational unit for its aircraft assigned to Royal Navy aircraft carriers, retaining the six-plane flight as the basic organizational unit only for aircraft assigned to operate from battleship and cruiser catapults
October 15 – The Rolls-Royce Merlin engine is started for the first time.