Chuck's calculation on p. 4

My SWAG is well in excess of 15K psi. Say 25,000 psi.

1) I base this on my estimation of the strength of the Damascus being around 60,000 psi ultimate, providing for mild steel being around 64,000 psi, and ductile iron being around 60,000 psi and some conservatism.

2) I used .100 as the Min Wall

3) A hoop calculation of a .798 I.D. chamber and .100 wall with a 60,000 psi strength is around 15,000 psi.

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