Re: Powder pressure curves Archived Message Posted by Drew Hause on November 29, 2014, 9:38 am, in reply to "Powder pressure curves" Another 120 year old pressure/time curve, but relevant, from Sporting Guns and Gunpowders: Comprising a Selection from Reports of Experiments, and Other Articles Published in the "Field" Newspaper, Relative to Firearms and Explosives, 1897 http://books.google.com/books?id=inQCAAAAYAAJ&source=gbs_navlinks_s “Powder Pressures At Different Parts of the Gunbarrel, 1895” p. 32 http://books.google.com/books?id=inQCAAAAYAAJ&q=pressure&source=gbs_word_cloud_r&cad=6#v=snippet&q=pressure&f=false (scroll down and click on p. 31) 1 1/8 oz. #6 shot at 1220 fps Using the estimated Lead Crusher Pressure (Cp) conversion to PSI (pound force per square inch) (Cp x 1.5) - .5 = TSI, TSI X 2240 = PSI Note: Modern transducer measurements average about 10% higher than LUP Ballistite was an early (rapid) Dense Smokeless Schultze an early Bulk Smokeless 32 Gr Ballistite (1 1/8 oz. at 1232 fps = 3 Dram Equiv.) Breech - 2.9 Tons per Square Inch (UK, Long) = 8624 psi (2.9 x 1.5 = 4.35, 4.35 - .5 = 3.85 TSI, 3.85 x 2240 = 8624psi) 2 1/2" - 2.2 Tons = 6272 psi 6” - 1.2 Tons = 3718 psi 12” - .81 Tons = 1602 psi 18” - .33 Tons 24” - .21 Tons 42 Gr Schultze 1 1/8 oz. at 1220 Breech - 1.69 Tons = 4558 psi 2 1/2” - 1.49 Tons = 3886 psi 6” - 1.36 Tons = 3450 psi 12” - .92 Tons = 1971 psi 18” - .55 Tons = 1178 psi 24” - .32 Tons Message Thread: 20 in 12 Pressure - Marcus Merritt November 27, 2014, 11:01 am Re: 20 in 12 Pressure - Drew Hause November 27, 2014, 11:34 am Re: 20 in 12 Pressure - Marcus Merritt November 27, 2014, 2:33 pm Re: 20 in 12 Pressure - Tom Martin November 27, 2014, 4:48 pm Re: 20 in 12 Pressure - Marcus Merritt November 28, 2014, 6:48 am Re: 20 in 12 Pressure - Doug November 28, 2014, 12:50 pm Re: 20 in 12 Pressure - Drew Hause November 28, 2014, 1:02 pm Re: 20 in 12 Pressure - Marcus Merritt November 28, 2014, 10:03 pm Powder pressure curves - Drew Hause November 29, 2014, 7:52 am Re: Powder pressure curves - Drew Hause November 29, 2014, 9:38 am Re: Powder pressure curves - Marcus Merritt December 2, 2014, 5:58 am Re: Powder pressure curves - david October 7, 2017, 9:37 pm Re: Powder pressure curves - Drew Hause October 8, 2017, 8:48 am   Searching