SIR (Mk139) fuze
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Model 0: for a variety of 7.2” rockets. 4.190” long. Brass alloy, brass rod, steel, die-casting alloy, manganese-bronze, flexible fiber gasket. SIR (“spring-arming, impact-firing rocket”) fuzes were designed for retro-bombing in antisubmarine warfare. Developed in 1942-1943, they were not produced in large numbers because of the abandonment of retro-bombing. “A”: cutaway version; “B”: complete version.
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- California Institute of Technology
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- Chicago citation style
- SIR (Mk139) fuze. 1942/1943. Retrieved from the Digital Public Library of America, http://archives-dc.library.caltech.edu/islandora/object/ct1%3A3436. (Accessed December 8, 2019.)
- APA citation style
- (1942/1943) SIR (Mk139) fuze. Retrieved from the Digital Public Library of America, http://archives-dc.library.caltech.edu/islandora/object/ct1%3A3436
- MLA citation style
- Retrieved from the Digital Public Library of America <http://archives-dc.library.caltech.edu/islandora/object/ct1%3A3436>.