Originally Posted by
Maillemaker
Yeah I guess my answer is not logical.
If there is an internal pressure of 20,000 PSI in the chamber, and the chamber is .45" in diameter, then the rear of the chamber has .159 square inches of surface area.
When we apply 20,000 PSI to the .159 square inches, that comes out to 3,180 pounds of force on the back wall of the cylinder. While true, it's also there for only an instant. So impulse is the key here. I don't know anything about calculating impulse.
It's like those Estes rockets as a kid. They develop high thrust but only for an instant.
https://en.wikipedia.org/wiki/Specific_impulse
I never really understood it.
Steve
You'll shoot your eye out!!
Gil Davis Tercenio
# 3020V
34th Battalion, Virginia Cavalry
Great, great grandson of Cpl Elijah S Davis, Co I, 6th Alabama Inf CSA
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