doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com LUP equates to PSI?

To convert PSI as determined by LUP (converting a measured mechanical change to an estimated pressure) to PSI as measured by modern piezo transducers, add 10-14%

To convert TONS as determined by LUP to modern transducer PSI use Burrard's formula.

UNLESS, like Coxe, you used a Tarage Table for PSI and to get TONS simply divided by 2240, or vv. THEN add 10-14%

Which is what these numbers are; published some time after 1920



and these in 1927



Ballistite 4.9 Tons X 2240 = 10,976 psi + 10 - 14%