Manufacturer       (Principal):                                                                               Supermarine Division of Vickers-Armstrongs in factories at, Southampton, Winchester, Swindon and Castle Bromwich.
                   (Subcontracted to): 
Manufacturer DesignationType 361
Aircraft Mk.Mk. IX
RAF Designation:Mk. IX
Construction:All – metal monocoque
Wing Span:36ft. 10in.
Length:                                    31ft. ½in.
Height:                                   12ft. 8in.
Engine:1,515hp. Merlin 61 or 1,710hp Merlin 63 or 63A.
        Internal Tanks                  (1)85 gallons
        Supplemental Tanks        (2)Slipper drop tanks of 30, 45 or 90 gallons.
Empty:                                    (1)5,750lb.
Loaded:                                 7,500lb.
Range:434 miles on 85 gallons / 980 miles on 175 gallons.
Bomb Load:N/A
Armament:20mm Hispano cannon (2 Nr.) 1in each wing.
 ·303 Browning machine gun (4 Nr.) 2 in each wing.
Maximum:408mph. at 25,000 ft.
Cruising:                                324 mph. at 20,000 ft.
Service Ceiling Height:42,500ft.
Initial Rate of Climb:6.7 min. to 20,000ft.
In Service Modifications: 
 Ultimately some Mk. IX’s were adapted to take the “E” wing which allowed a change of armament to 20mm Hispano cannon (2 Nr.) 1in each wing and ·50 Browning machine gun (2 Nr.) 1 in each wing.
Bradwell Bay Service: 
Motto:C’est en forgeant  Practice makes perfect
Dates:August – 10th September 1945
Missions:Attack simulations in order to provide continuation train for anti-aircraft units.
Colour Scheme.                    Standard RAF pattern: Dark green and Ocean grey upper surfaces. Medium Sea Grey lower surfaces.
Aircraft Nickname/s:Shrew – is what R. J. Mitchell wanted call it, he thought Spitfire to be a “dammed silly” name. 
Technical data: Aircraft of the RAF 1918 by Owen Thetford and Jane’s Fighting Aircraft of World War II
(1) Spitfire Mk IX Weights and Loading (