The Nuclear Bomb Computer Slide Rule

Quick Overview

The video explores the historical and technical significance of the 1957 "The Effects of Nuclear Weapons" pamphlet and the accompanying J.B. Carroll/Lovelace Foundation Nuclear Bomb Effects Computer, a circular slide rule used to calculate blast, thermal, and radiation effects, demonstrating how this cheap plastic tool provided critical data that informed Cold War planning and survival strategies.

Key Points: The pamphlet "The Effects of Nuclear Weapons," first published in 1957 by Samuel Glasstone and Philip J. Dolan, details the physical and biological consequences of nuclear explosions. The accompanying Nuclear Bomb Effects Computer, a circular slide rule developed by the Lovelace Foundation, cost only $1 and was designed to calculate 28 different effects, including blast overpressure and thermal radiation radii, based on weapon yield. The narrator uses the computer to calculate that a 15-kiloton surface burst (similar to the Hiroshima bomb) would result in a blast wave velocity of 30 feet per second at a range of 1.6 miles, and an initial nuclear radiation dose of 10 to 50 rems at a distance of 0.3 kilometers. The pamphlet was updated three times, with the last revision in 1976, and contains 730 pages of technical data, including 18 figures, graphs, and tables. The video contrasts the detailed calculations possible with the computer against the lack of preparation knowledge in the immediate aftermath of Hiroshima in 1945, highlighting the necessity of such tools for emergency responders and public officials. The narrator expresses admiration for the complex yet inexpensive nature of the analog computer, noting that its data aligns closely with modern simulations, which reinforces the historical accuracy of the pamphlet's predictions.

Context: The video focuses on historical artifacts from the early Cold War era related to nuclear warfare preparedness: the 1957 government pamphlet, "The Effects of Nuclear Weapons," and a specialized analog calculation tool called the Nuclear Bomb Effects Computer. The narrator, speaking from a futuristic-looking laboratory set, frames these items as crucial pieces of scientific communication from a time when the world was rapidly learning the consequences of atomic weaponry.