Little Feller II

Little Feller II. It was a low-yield atmospheric nuclear test conducted by the United States as part of Operation Sunbeam at the Nevada Test Site in July 1962. The test was a weapons effects experiment and a key demonstration of the tactical nuclear doctrine of the U.S. Department of Defense. It is historically notable for being the final atmospheric nuclear test conducted by the United States before the signing of the Limited Test Ban Treaty.

Background and purpose

The test was conceived during the height of the Cold War amid evolving strategies for limited and tactical warfare. Operation Sunbeam, also known as Operation Dominic II, was a series designed to investigate the effects of nuclear detonations on military hardware, communications, and defensive structures. Primary objectives included evaluating the survivability of armored vehicles, air defense systems, and electronic equipment in a nuclear battlefield environment. The data was intended to inform the U.S. Army's and U.S. Marine Corps' operational plans under the Joint Chiefs of Staff's guidance.

Test execution

The device was detonated on July 17, 1962, on a section of the Nevada Test Site known as Area 10 of Yucca Flat. The test was conducted as a "safety experiment" with a yield deliberately kept below one kiloton to minimize fallout. The firing party and observers, including high-ranking officials from the Pentagon and Congress, were positioned at a command post several miles from ground zero. The detonation was executed using a device suspended from a tower, a common method for atmospheric tests to simulate an airburst, with extensive instrumentation including Fastax high-speed cameras and blast gauges deployed around the site.

Technical specifications

The explosive device was a fission-type nuclear warhead. While its exact design remains classified, it was a variant of the W54 warhead, which was used in portable systems like the Davy Crockett recoilless gun. The yield was officially reported as "less than one kiloton," placing it in the sub-kiloton or very low-kiloton range. The primary delivery system for the test was not a missile or artillery piece but a stationary tower, allowing for precise measurement of effects. Instrumentation arrays were set up to record data on blast pressure, thermal radiation, and neutron flux.

Results and analysis

Immediate observations confirmed the predicted low yield and the effectiveness of the hardened military equipment placed within the test range. Analysis of the blast effects provided crucial data on the vulnerability of fielded systems like the M48 tank and various command bunkers. The test contributed to the understanding of nuclear weapons effects for civil defense planning and the hardening of critical national infrastructure. The findings were integrated into military manuals and influenced the design of later equipment under programs managed by the Defense Nuclear Agency.

Legacy and historical significance

The test holds a unique place in history as the last atmospheric test conducted by the United States, occurring just over a year before the United States, United Kingdom, and Soviet Union signed the Limited Test Ban Treaty in August 1963. Footage from the test, including the iconic image of Attorney General Robert F. Kennedy observing the detonation, became a symbol of the era's nuclear diplomacy. The data collected continued to inform NATO military strategy throughout the Cold War. Today, the site is part of the Nevada National Security Site, and the event is studied as a milestone in the history of nuclear weapons testing and arms control.

Category:1962 in the United States Category:Nuclear weapons tests of the United States Category:Nevada Test Site Category:Cold War military history of the United States Category:1962 in science