Origins The origin of the Victor and the other V bombers is linked to the early
British atomic weapons programme and
nuclear deterrent policies that were developed after the
Second World War. The atom bomb programme formally began with Air Staff Operational Requirement OR.1001 issued in August 1946, which anticipated a government decision in January 1947 to authorise research and development work on atomic weapons; the US
Atomic Energy Act of 1946 (McMahon Act) prohibited the export of atomic knowledge, even to countries that had collaborated on the
Manhattan Project. OR.1001 envisaged a weapon not to exceed in length, in diameter, in weight, and suitable for release from to . At the same time, the
Air Ministry drew up requirements for bombers to replace the
piston-engined heavy bombers such as the
Avro Lancaster and the new
Avro Lincoln which equipped
RAF Bomber Command. In January 1947, the
Ministry of Supply distributed
Specification B.35/46 to aviation companies to satisfy Air Staff Operational Requirement OR.229 for "a medium range bomber landplane capable of carrying one bomb to a target from a base which may be anywhere in the world". A cruising speed of at heights between and was specified. The maximum weight when fully loaded ought not to exceed . The weapons load was to include a "Special gravity bomb" (i.e. a
free-fall nuclear weapon), or over shorter ranges of conventional bombs. No defensive weapons were to be carried, the aircraft relying on its speed and altitude to avoid opposing fighters. The similar OR.230 required a "long range bomber" with a radius of action at a height of , a cruising speed of , and a maximum weight of when fully loaded. Responses to OR.230 were received from
Short Brothers,
Bristol, and
Handley Page; the Air Ministry recognised that developing an aircraft to meet these stringent requirements would have been technically demanding and so expensive that the resulting bomber could be purchased only in small numbers. Realising that the majority of likely targets would not require such a long range, a less demanding specification for a medium-range bomber,
Air Ministry Specification B.35/46 was issued. This demanded the ability to carry the same 10,000 lb bomb-load to a target away at a height of at a speed of . Aviation author Bill Gunston described the Victor's compound-sweep crescent wing as having been "undoubtedly the most efficient high-subsonic wing on any drawing board in 1947". The
sweep and
chord of the wing decreased in three distinct steps from the root to the tip, to ensure a constant
critical Mach number across the entire wing and consequently a high cruise speed. The other parts of the aircraft which accelerate the flow, the nose and tail, were also designed for the same critical mach number so the shape of the HP.80 had a constant critical mach number all over. The profile and shaping of the crescent wing was subject to considerable fine-tuning and alterations throughout the early development stages, particularly to counter unfavourable pitching behaviour in flight. The HP.80 and Avro's
Type 698 were chosen as the best two of the proposed designs to B.35/46, and orders for two prototypes of each were placed. It was recognised, however, that there were many unknowns associated with both designs, and an order was also placed for Vickers' design, which became the
Valiant. Although not fully meeting the requirements of the specification, the Valiant design posed little risk of failure and could therefore reach service earlier. The HP.80's crescent wing was tested on a ⅓-scale
glider, the HP.87, and a heavily modified
Supermarine Attacker, which was given the
Handley Page HP.88 designation. The HP.88 crashed on 26 August 1951 after completing only about thirty flights and little useful data was gained during its brief two months of existence. By the time the HP.88 was ready, the HP.80 wing had changed such that the former was no longer representative. The design of the HP.80 had sufficiently advanced that the loss of the HP.88 had little effect on the programme. Two HP.80 prototypes,
WB771 and
WB775, were built.
WB771 had been partially assembled at the Handley Page factory at
Radlett airfield when the Ministry of Supply decided the runway was too short for the first flight. The aircraft parts were transported by road to
RAF Boscombe Down where they were assembled for the first flight; bulldozers were used to clear the route and create paths around obstacles. Sections of the aircraft were hidden under wooden framing and tarpaulins printed with "GELEYPANDHY / SOUTHAMPTON" to make it appear as a boat hull in transit. GELEYPANDHY was an
anagram of "Handley Pyge", marred by a signwriter's error. On 24 December 1952, piloted by Handley Page's chief test pilot
Hedley Hazelden,
WB771 made its maiden flight, which lasted for a total of 17 minutes. Ten days later, the Air Ministry announced the aircraft's official name to be
Victor. The prototypes performed well; however, design failings led to the loss of
WB771 on 14 July 1954, when the tailplane detached whilst making a low-level pass over the runway at
Cranfield, causing the aircraft to crash with the loss of the crew. Attached to the fin using three bolts, the tailplane was subjected to considerably more load than had been anticipated, causing fatigue cracking around the bolt holes. This led to the bolts loosening and failing in shear. Stress concentrations around the holes were reduced by adding a fourth bolt. The potential for flutter due to shortcomings in the design of the fin/tailplane joint was also reduced by shortening the fin. Additionally, the prototypes were tail heavy due to the lack of equipment in the nose; this was remedied by adding large ballast weights to the prototypes. Production Victors had a lengthened nose to move the crew escape door further from the engine intakes as the original position was considered too dangerous as an emergency exit in flight. The lengthened nose also improved the
center of gravity range.
Victor B.1 day event, 1959 Production
B.1 Victors were powered by the
Armstrong Siddeley Sapphire ASSa.7 turbojets rated at , and were initially armed with the Blue Danube nuclear weapon and later with the more powerful
Yellow Sun weapon when it became available. Victors also carried US-owned
Mark 5 nuclear bombs (made available under the
Project E programme) and the British
Red Beard tactical nuclear weapon. A total of 24 were upgraded to
B.1A standard by the addition of
Red Steer tail warning radar in an enlarged tail-cone and a suite of radar warning receivers and
electronic countermeasures (ECM) from 1958 to 1960. On 1 June 1956, a production Victor
XA917 flown by
test pilot Johnny Allam inadvertently exceeded the
speed of sound after Allam let the nose drop slightly at a high power setting. Allam noticed a cockpit indication of Mach 1.1 and ground observers from
Watford to
Banbury reported hearing a
sonic boom. The Victor maintained stability throughout the event. Aviation author Andrew Brookes has claimed that Allam broke the sound barrier knowingly to demonstrate the Victor's higher speed capability compared to the earlier V-bombers. The Victor was the largest aircraft to have broken the sound barrier at that time.
Victor B.2 undergoing pre-flight preparations The RAF required its bombers to be capable of higher operational ceilings, and numerous proposals were considered for improved Victors. Initially, Handley Page proposed using Sapphire 9 engines to produce a "Phase 2" bomber, to be followed by "Phase 3" Victors with the wingspan increased to and powered by
Bristol Siddeley Olympus turbojets or
Rolls-Royce Conway turbofans. The Sapphire 9 was cancelled and the heavily modified Phase 3 aircraft would have delayed introduction, so an interim "Phase 2A" Victor was proposed and accepted, to be powered by the Conway but with minimal modifications. The "Phase 2A" proposal became the
Victor B.2, with Conway RCo.11 engines providing , which required enlarged intakes to increase the airflow to the engines, and the wingspan was increased to . The B.2 also added a pair of retractable "elephant ear" intakes on the upper rear fuselage forward of the fin, to feed air to
ram air turbines to provide electricity should an in-flight engine failure occur. The first flight of the Victor B.2 prototype, serial number
XH668, was made on 20 February 1959, and it had flown 100 hours by 20 August 1959, when it disappeared from radar, crashing into the sea off the
Pembrokeshire coast during high-altitude engine tests carried out by the
Aeroplane and Armament Experimental Establishment (A&AEE). Most of the wreckage had been recovered by November 1960, following an extensive search-and-recovery operation. The accident investigation concluded that the starboard
pitot head had failed, causing the
flight control system to force the aircraft into an unrecoverable dive. Minor changes resolved the problem, allowing the B.2 to enter service in February 1962. Anti-radar chaff storage had to be relocated from under the nose as a result of the Blue Steel installation. Coincidentally, Peter White, a senior aerodynamicist attended a symposium in Brussels and learned of Whitcomb's conical bodies set on the top of a wing which would add volume while reducing wave drag. However, the added skin friction drag meant an overall slight drag increase, so large streamlined fairings were added to the top of each wing to hold the chaff. The fairings behaved like "
Küchemann carrots". These were
anti-shock bodies which reduced
wave drag at
transonic speeds (see
area rule). Handley Page proposed to build a further refined "Phase 6" Victor, with more fuel and capable of carrying up to four
Skybolt (AGM-48) ballistic missiles on standing airborne patrols, but this proposal was rejected although it was agreed that some of the Victor B.2s on order would be fitted to carry two Skybolts. This plan was abandoned when the US cancelled the Skybolt programme in 1963. Nine B.2 aircraft were converted for strategic reconnaissance purposes to replace Valiants which had been withdrawn due to wing fatigue, with delivery beginning in July 1965.
Aerial refuelling conversion in 1985; note the deployed refuelling drogues. Prior to the demise of the Valiant as a tanker, a trial installation of refuelling equipment was carried out using the Victor, including: overload bomb-bay tanks, underwing tanks, refuelling probe and jettisonable
de Havilland Spectre Assisted Take-Off units. The aircraft involved in the trials, B.1 "XA930", carried out successful trials at Boscombe Down at very high all-up weights with relatively short field length take-offs. With the withdrawal of the Valiant because of
metal fatigue in December 1964 the RAF had no flight-refuelling capability, so the B.1/1A aircraft, by then surplus in the strategic bomber role, were refitted for this duty. To get some tankers into service as quickly as possible, six B.1A aircraft were converted to
B(K).1A standard (later redesignated
B.1A (K2P) While these six aircraft provided a limited tanker capability suitable for refuelling fighters, the Mk 20A wing hosereels delivered fuel at too low a rate to be suitable for refuelling bombers. Work therefore continued to produce a definitive three-point tanker conversion of the Victor Mk.1. Fourteen further B.1A and 11 B.1 were fitted with two permanently fitted fuel tanks in the bomb bay, and a high-capacity Mk 17 centreline hose dispenser unit with three times the fuel flow rate as the wing reels, and were designated
K.1A and
K.1 respectively. This, combined with the switch of the nuclear deterrent from the RAF to the
Royal Navy (with the
Polaris missile) meant that the Victors were declared surplus to requirements. The K.2 could carry of fuel. It served in the tanker role until withdrawn in October 1993. ==Design==