Operation Redwing Shot Zuni with Original Audio

Test: Zuni (Redwing series)
Time: 17:56.00.3 27 May 1956 (GMT) 5:56.00.3 28 May 1956 (local)
Location: Bikini Atoll, Eninman (Tare) Island
Test Type: Surface burst
Elevation +: Height 2 m (6 ft 7 in) + 3 m (9.8 ft)
Yield: 3.5 Mt
Location : 11.50325°N 165.37049°E
First test of 3 stage device. Clean version using lead tamper, 85% fusion; Tewa is dirty version of same bomb. Design evolved into Mk-41, largest deployed US bomb.
The Bassoon device fired in Zuni was the first test ever of an innovative three stage thermonuclear design. The configuration fired in this test was a "clean" (low fallout) version using a lead tamper around the thermonuclear third stage. Only 15% of the energy yield was from fission. A "dirty" version of this design, was later fired in Redwing Tewa. The predicted yield for Zuni was 2-3 Mt. Crater dimensions were 710m wide and 35m deep.
wikimapia.org/1415442/Castle-Koon-and-Redwing-Zuni-shot-craters