Below: two shemes propositions.
Below: the decal sheet for two differentairplanes, the SX-1 and the SX-2
Espadon History:Theflying sub program "Exocet" found its origin in the final monthsof WW2 and America's planned invasion of Japan. Because the War's end failedto decrease international tensions, the project was allowed to continue.However, to hide the project's existance from former allies, the Britishchanged its codename to "Swordfish". A lot of input from capturedGerman aircraft engineers resulted in modifications to the machine's appearance.The lozenge wings of the Zitterrochen missile were adopted and, in a concernfor the high mach speeds the craft was expected to reach, it was decidedthat some of the prototypes would test the prone pilot arrangement thathad been found on the captured DFS 228 D-IBFQ (examined by the RAF Farnborough).
At this time there was considerablediscussion regarding the best seating arrangement for supersonic aircraft.Other configurations, like a highly reclined seat or even the "submerged"cockpit proposed by the Horten brothers, were planned for future prototypes.However, the first five machines were to be built with conventional seatingsince it was believed to offer the best exterior visibility consideringthe high taper of the aircraft's nose.
Propulsion was also a hot topic ofdebate between proponents of a simple rocket engine and those who wishedto use the new atomic engine that was then in development. The first testsof the atomic powerplant aboard a Boeing "Golden Rocket" bomberconvinced the skeptics, and atomic propulsion was selected for the Òswordfishmk-1.
The first prototype was built in 1947-48at the "Scawfell" secret factory (this spurious name was a coverfor one the "shadow factories" built by Lord Beaverbrook at theheight of the Battle of Britain). However this first machine was nevercompleted : it was voluntarily destroyed with all the factory during thesurprise attack by Basam-Badus forces in mid-1948.
Construction of the first prototypeswas then transferred to a British base near the Ormuz Straits. The firstmachine, which had inherited the destroyed prototype's SX-1 designation,flew about 6 months later, but was soon destroyed by the enemy forces.However SX-2 had, in the meantime, proved the value of the concept by destroyingpart of the "Yellow" (Tibetan) navy.. Production of a pre-serieswas therefore rushed and the planned manufacturer testing (originally estimatedat a very optimistic two months) was reduced to static runs of the engineand a few underwater tests.
A few weeks later, all the machinesavailable (SX-2 to SX-9) were mustered for an attack on the Tibetan capital,Lhassa. Most of the city, including the famous Potala temple, was destroyedby A-bombs launched by the British squadron. The dictator emperor Basam-Baduwas killed in the attack, thus ending the war.
Production of the SX-series was apparentlyabandoned after that, possibly because all efforts were now directed towardrebuilding the economy.