U.S. Army M4A1 Nuclear Yield Calculator 

This calculator is used to estimate the yield, in kilotons, of a nuclear weapon. It permits various measured parameters of the explosion to be used: the time in seconds from the flash to the bang and the observed width of the cloud; the distance to ground zero and the observed width of the cloud; the fireball illumination time, and; the flash to band time and the elevation angle.

The M4A1 is a component of the U.S. Army M28A1 RADIAC calculator set.  Detailed information can be found in the FM-3-3-1 Field Manual.

Size: 4.5" diameter

References

Instruction card, no date.

FM-3-3-1 Field Manual. Nuclear Contamination Avoidance.  Headquarters Department of the Army U.S. Marine Corps., Washington DC September 1994. This can be seen at http://www.adtdl.army.mil/cgi-bin/atdl.dll/fm/3-3-1/toc.htm 

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Last updated: 05/10/11
Copyright 1999, Oak Ridge Associated Universities