rexford Posted June 30, 2004 Share Posted June 30, 2004 A question came up regarding the diameter and weight of the 90mm HVAP round used during WW II, and it would be appreciated if someone on the forum could post the information. My available references are not sufficient. Thanks. 0 Quote Link to comment Share on other sites More sharing options...
Kromyr Posted July 9, 2004 Share Posted July 9, 2004 Check out this link. I hope this may help. Beware, its a slow load (fairly large .pdf). It is a declassified Standard Ordnance Catalogue, 1944. The 90mm starts on page 87 of the PDF. 0 Quote Link to comment Share on other sites More sharing options...
flamingknives Posted July 9, 2004 Share Posted July 9, 2004 If that's the same catalogue I have (and I'm pretty sure that it is), It doesn't have 90mm HVAP in it. 0 Quote Link to comment Share on other sites More sharing options...
rexford Posted July 10, 2004 Author Share Posted July 10, 2004 Originally posted by Kromyr: Check out this link. I hope this may help. Beware, its a slow load (fairly large .pdf). It is a declassified Standard Ordnance Catalogue, 1944. The 90mm starts on page 87 of the PDF. Thanks. There seems to be much in there that is good for our research. Lorrin 0 Quote Link to comment Share on other sites More sharing options...
rexford Posted July 19, 2004 Author Share Posted July 19, 2004 Phil Gollin posted the following data on the AFV News site: "Weight of core 8 lbs, diameter 1.88 inches, total projectile weight 16.8 lbs. According to the report : "Contray to British practice, the tungsten core of the American 90mm composite rigid shot has no steel sheath nor other protective devices to give good spaced plate performance."" If the U.S. 76mm HVAP round penetrates 247mm at 0 degrees and 3400 fps with a 3.9 pound tungsten core (1.5 inch core diameter), the DeMarre equation predicts that 90mm HVAP would penetrate 317mm at 0 degrees and 3350 fps. The actual is around 313mm. 0 Quote Link to comment Share on other sites More sharing options...
rexford Posted July 19, 2004 Author Share Posted July 19, 2004 Here are the DeMarre estimates for 90mm HVAP from 76mm HVAP at ranges out to 2000 yards: 0 yards, 3350 fps, Actual is 315mm, DeMarre is 317mm 500 yards, 3125 fps, actual is 284mm and DeMarre is 287mm 1000 yards, 2915 fps, actual is 257mm and DeMarre is 260mm 1500 yards, 2700 fps, actual is 229mm and DeMarre is 233mm 2000 yards, 2500 fps, actual is 203mm and DeMarre is 209mm Not as close as with Russian 85mm HVAP but less than 2% error to 1500 yards. Interesting to note that Russian 85mm HVAP tungsten core is 27.8mm diameter and 0.65 kg weight while U.S. 90mm HVAP core is 47.8mm diameter and 3.62 kg. U.S. rather generous in use of tungsten. Russian 76.2mm HVAP combined a tungsten core and a steel follow-up plug to increase total weight of penetrator while conserving tungsten. Lorrin 0 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.