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7000lb, Thermo-Nuclear, Yellow Sun, Practice, Inert

Aircraft & Exhibits, Circa 1960-1965, Cosford, Hangar Four, 69/O/109

Yellow Sun was the first thermonuclear weapon developed for operational service in the United Kingdom. Yellow Sun Mk1 was essentially a boosted fission weapon with a yield of about 500Kt. Yellow Sun Mk2 had a larger yield of 1Mt. The name referred to the bomb's casing, which could contain various different warheads.

Image pending

Recorded interview with Group Captain Ken Edmonds, 28 April 2022

Film & Sound, In Storage, X008-7339

Interview with Ken Edmonds, who served as a navigator in Canberra and Valiant aircraft, including participation in nuclear weapons tests in Australia and the Pacific as part of Operation Grapple.

Image pending