What Happened To World's Best (Jet+Rocket) Interceptor? | Saunders-Roe SR.53

On 4th April 1957, the British government published the Defence White Paper authored by Minister of Defence Duncan Sandys. Among its conclusions: manned fighter aircraft were obsolete, the future of air defence was guided missiles, and all existing manned interceptor development programmes were to be cancelled immediately. One of those programmes was the Saunders-Roe SR.53. Forty-two days later — 16th May 1957 — Squadron Leader John Booth DFC, Saunders-Roe's chief test pilot, conducted the aircraft's first flight at RAF Boscombe Down. The government had already written its obituary. He flew it anyway. Test results were unambiguous: the aircraft was "an extremely docile and exceedingly pleasant aircraft to fly, with very well harmonised controls." It achieved Mach 1.33 in level flight. Lieutenant Commander Peter Lamb subsequently reached Mach 1.45 at 56,000 feet. Both figures were well below the aircraft's projected Mach 2-plus capability at operational altitude. The programme was cancelled before that ceiling had been explored. The SR.53 was Britain's answer to the Me 163 problem — how to combine a rocket engine's unmatched rate of climb with the ability to return to base under power. Its solution was elegant: an Armstrong Siddeley Viper turbojet producing 1,640 pounds of thrust for cruise, takeoff, and landing, stacked vertically beneath a de Havilland Spectre rocket engine producing 8,000 pounds of thrust for the interception itself. The design target was 60,000 feet in two and a half minutes from brake release. High Test Peroxide as the rocket oxidiser. Two de Havilland Firestreak infrared missiles on the wingtips. No radar — the ground station's job. A clipped delta wing, 45 feet long, 25 feet in span. A pointed nose with nothing in it because no radar meant a smaller, lighter nose. Saunders-Roe had not initially been invited to submit a design — the Ministry of Supply didn't think a flying boat company was relevant. Chief designer Maurice Brennan contacted the Ministry directly. He was right to. On 5th June 1958, the second prototype XD151 lost rocket power during the takeoff run at Boscombe Down. The Viper alone could not get the aircraft airborne. The aircraft struck concrete posts at the runway's end and exploded. John Booth was killed instantly. He was 37 years old. He held the Distinguished Flying Cross. He had conducted the aircraft's maiden flight thirteen months earlier. The third prototype XD153 was never built. The SR.177 — a far more capable derivative using a 14,000-pound-thrust Gyron Junior jet engine, with radar, supersonic cruise capability, and serious interest from the RAF, Royal Navy, and West German Navy — was cancelled the same day as the SR.53. West Germany's requirement went to the Lockheed F-104 Starfighter in circumstances that subsequently generated bribery investigations across three countries. XD145, the surviving prototype, is on display at RAF Museum Cosford. The English Electric Lightning — the aircraft that the White Paper designated Britain's last-ever manned fighter — served until 1988 and was replaced by the Tornado. The prediction that manned fighters would become obsolete was proven wrong by every decade that followed. #SaundersRoeSR53 #DefenceWhitePaper #DuncanSandys #ColdWarAviation #RocketInterceptor #BritishAviation #RAFCosford #JohnBooth #EnglishElectricLightning #ForgottenAircraft 📺 RELATED PLAYLISTS: • British WWII Aircraft:    / watchv=qimhvv6pre8&list=plcehin6dhwilpwagz...   • WWII German Aircraft:    / watchv=__drphxfkww&list=plcehin6dhwil2f8ui...   • WWII Japanese Aircraft:    / watchv=8s5thv6nzo&list=plcehin6dhwikpqf9eg...   • B-17 Flying Fortress Stories:    • Frankenstein B17G bomber with jet engines,...   🔔 Subscribe for more stories about the forgotten, unusual, and overlooked aircraft of WWII. Copyright Disclaimer: - Under section 107 of the copyright Act 1976, allowance is mad for FAIR USE for purpose such a as criticism, comment, news reporting, teaching, scholarship and research. Fair use is a use permitted by copyright statues that might otherwise be infringing. Non- Profit, educational or personal use tips the balance in favor of FAIR USE