H.P.80 Victor B.1
The initial Victor produced was the B.1, with significant changes from the original prototypes. The aircraft's mission was that of a high level nuclear bomber, effectively an atomic Halifax or Lancaster.
As noted, the forward cockpit was lengthened for centre of gravity considerations and the tail shortened, the leading edge slats disabled and vortex generators added to the wings. Cockpit glazing was also increased in area and the tail mounted air intake removed. Less obviously the very rear bomb bay doors, designed for allowing dropping of additional flash-bombs for photo reconnaissance, were also deleted.
The first production aircraft flew in February 1956 - and became the largest aircraft at that time to go supersonic on 1 June 1957. The first 5 Victor B.1's were completed in an aluminium metal colour scheme.
All subsequent Victors B.1's were completed in a white anti-flash scheme, to minimise heat damage from nuclear detonations. It did however take some time to realise that the black and dark blue detail paint would provide a major weakness to this heat-proofing, and eventually a toned down pale blue and red were adopted for roundels and serials.
Four aircraft were completed as B(PR).1 photo-reconnaissance aircraft, with "special reconnaissance equipment" including Yellow Aster sideways looking radar. These aircraft did not appear significantly different from their standard B.1 siblings, and formed the Radar Reconnaissance Flight after completion of the initial Victor crew qualification.
Working on improving the in service Victor B.1's, led to the B.1A upgrade programme. The Vickers Valiant was planned to be the V-bomber tanker so Victors were not required to have any fuel tanking capability, but a need was to receive air-to-air refuelling. A refuelling probe was fitted as a part of the upgrade, as was more sophisticated electronic warfare suite in a revised tailcone and with an airconditioning scoop under the rear belly. The final major modification was the installation of a revised "drooped" wing leading edge.