Picture of the day

Backward helmet, you say?

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Apparently done as an "aid to visibility". Lay down prone, and the "skirt" hits your back and shoves the helmet over your eyes.

Or, if you're Jean, you have zero familiarity and the people helping you take pleasure in making you look like an idjit.
 
I wonder how much of a constriction was called for?

.025" seems impossible. I am thinking the threaded section only required minimal fitting after it was shrunk on to the parallel section of the barrel. Who knows so long after the fact though. I am thinking the threaded shank would need quite a lot of preload put on the chamber. I am thinking in terms of the Armstrong guns built up like a telescopic puzzle. So who knows how much of a constriction was just right?
 
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