FederalRead-Parrott |
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| The sulphur matrix used in the specimen above was often found to be brittle and therefore crumbled during formation of the cavity, unlike coal-tar, which was more flexible. Note that the bursting cavity was formed by drilling through the case-shot material. A Federal Read-Parrott, 2.9-inch caliber projectile fitted with a Bormann time fuze is rare. The 5 1/4-second burning time of the standard Federal Bormann time fuze was insufficient for rifled artillery because its range was so much greater than that of smoothbore cannon. |
