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Bombs Fall on Oregon: Japanese Attacks on the State


A diagram of balloon bomb parts:  1. The balloon: Diameter - 33 1/2 feet; volume - approx. 19,000 cubic feet; material - paraffin treated paper.  2. Rubber shock cord or bungee.  3. Sketch of incendiary-type bomb found at Medford, Oregon.  4. Japanese 15KG antipersonnel bomb found at Thermopolis, Wyoming.  5. Rope arrangement of skirt section (enlarged).  6. Battery unit of balloon. Includes: metal poles, bakelite plate, aluminum ring, squib fuse, and aneroid barometer.  7. Release arrangement.  8. Fuse housing bolted beneath the center of the cross-beams.   (Image and description courtesy Canada's Digital Collections)

A diagram of balloon bomb parts:
1. The balloon: Diameter - 33 1/2 feet; volume - approx. 19,000 cubic feet; material - paraffin treated paper.
2. Rubber shock cord or bungee.
3. Sketch of incendiary-type bomb found at Medford, Oregon.
4. Japanese 15KG antipersonnel bomb found at Thermopolis, Wyoming.
5. Rope arrangement of skirt section (enlarged).
6. Battery unit of balloon. Includes: metal poles, bakelite plate, aluminum ring, squib fuse, and aneroid barometer.
7. Release arrangement.
8. Fuse housing bolted beneath the center of the cross-beams.
(Image and description courtesy Canada's Digital Collections)

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An Oregon State Archives Exhibit - Copyright © 2008