History
There was a time when interior ballistics didn't have a lot of information. The barrels would be built strong enough to survive a known overload (proof).
Muzzle velocity could be measured.
Then barrels were instrumented. Holes were drilled in the barrel, "crusher gauges" using copper pellets were attached, the gun was fired, and the pressure was measured indirectly by how much the copper pellet was deformed. The measurement only indicated the maximum pressure that was reached at that point in the barrel.
Later, piezoelectric sensors were used. They allow the instantaneous pressure to be measured. Also strain gauges on the barrel did not need a pressure port.
Instrumented projectiles were developed that could measure the pressure at the base of the projectile and the acceleration.
Read more about this topic: Internal Ballistics
Famous quotes containing the word history:
“What would we not give for some great poem to read now, which would be in harmony with the scenery,—for if men read aright, methinks they would never read anything but poems. No history nor philosophy can supply their place.”
—Henry David Thoreau (1817–1862)
“The history of a soldier’s wound beguiles the pain of it.”
—Laurence Sterne (1713–1768)
“The one duty we owe to history is to rewrite it.”
—Oscar Wilde (1854–1900)