The De Havilland Sea Venom FAW.21 (FAW - Fighter All Weather) was based on the RAF's 1953 Venom NF.2 night fighter, the main changes being the introduction of folding wings, a "V" shaped tail hook, strengthened undercarriage, fixed wing-tip fuel tanks and a canopy that facilitated underwater ejection! The Sea Venom FAW.21 was fitted with an enlarged nose which contained an advanced American Westinghouse AI.21 radar giving the aircraft night fighter caperbility and the more poreful de Havilland Ghost 104 engine which made deck take-offs from a carrier flight-deck far more practical than in the aborted Sea Vampire fighter design earlier trialled with the Royal Navy, a total of 167 De Havilland Sea Venoms were built. de Havilland intended to further improve the Sea Venom design but the Royal Navy wanted a twin engined fighter, de Havilland responded to this requirement with the Sea Vixen, based on a design they had been developing to replace the RAF's Mosquito night fighters. The Sea Vixen still retained the twin tail-boom arrangement, but was enormous compared to the similar looking but diminutive Sea Vampire and Sea Venom designs, literally going from one extreme to the other as far as size and power, one can not but imagine what a Vampire/Vampire pilot would have thought the first time he approached and climbed into a Sea Vixen! It is of note that 39 Sea Venom FAW.21's were built for the Australian Navy as the De Havilland Sea Venom FAW.53 and 121 De Havilland Sea Venom FAW.20's built under licence by SNCASE for the French Navy as the "Aquilon" (Sea Eagle) powered by a Fiat-built Ghost 48 Mark I engine. | 
