Bizarre WWI artillery fuse
Posted 22 November 2019 - 10:03 AM
“The 3inch shells had a crimping at the lower end of the shell and yours hasn’t which means it is definitely an American made 75mm shell fitted with a M1907 PTTF (Powder Train Time Fuze). The number 7898 is the model number often followed by the year of manufacturing (16 = 1916). Fuze has been modified to fit a lamp fitting. I believe that the fuze adaptor ring is probably from a 3” shell as it does not properly fit this shell. Nevertheless a nice specimen in remarkable good condition for its age. Nice find.
Hope this helps.”
Posted 22 November 2019 - 10:28 AM
Posted 22 November 2019 - 10:36 AM
The 3" was a heavier round, used an entirely different case style. Upon filling, the brass case was crimped into those rings, all US 3" projectiles were crimped on. That is what differentiates the 75mm shrapnel round from the 3" shrapnel round (76.2"). They used the same fuze, different adapter rings.
Ok got it. The round I purchased does not have those rings. Ive noticed that these rings are mostly on French made rounds and earlier US rounds. I wonder what their intended purpose is
Edited by 917601, 22 November 2019 - 10:40 AM.
Posted 22 November 2019 - 10:59 AM
Edited by 917601, 22 November 2019 - 11:01 AM.
Posted 22 November 2019 - 11:22 AM
Posted 22 November 2019 - 11:55 AM
Theory of operation. As a footnote, the Brits mostly used the shrapnel shell timed to discharge its balls as little as 100 yards in Front of its advancing troops. The matrix mixed in with the balls was an incendiary emitting smoke so the shrapnel balls point of impact could be observed and corrected to land immediately in front of their advancing troops.The US did not like using that tactic due to friendly casualties inflicted by poorly timed fuzes and quickly developed HE shrapnel shells ( projectile was filled with HE, not balls, and the steel case supplied the high velocity unidirectional shrapnel). The lead ball shrapnel shell ( was directional forward) only pushed the lead balls at about 1300 FPS, the HE shrapnel traveling supersonic.
Posted 22 November 2019 - 01:29 PM
I cant imagine the shrapnel rounds were as effective as the later HE rounds. It doesnt seem that there would be nearly as much kinetic energy traveling behind those ball bearings, as there would be with a hunk of steel being propelled by the HE charge. It reminds me a little of the new M825 WP round we use to dispense white phosphorous soaked wedges that produce smoke. Pretty similar method of dispensing what is inside the round.
Posted 22 November 2019 - 02:19 PM
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