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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Is a barrel's resonant frequency static?
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<blockquote data-quote="Trickymissfit" data-source="post: 636961" data-attributes="member: 25383"><p>ammunition shot in most tanks is known as "fixed ammunition", and is primarly designed for direct fire (line of sight). There has been some experimentation in the past with tanks shooting indirect fire (last I heard was with the M60), but the real issue with that is that tanks do not use a perfect plain to shoot off of (three point suspension). That's why we have self propelled guns. Just a completely different application of a round being shot. SPG's as a rule do not need super high velocity rounds like a tank does, but they must have a very precise form of location (and readjusting) fire because they usually can't see the target. Direct fire from an artillary piece is not very good setup, and one usually prays he never has to use that method (I have several times).</p><p> </p><p>I cannot tell you what's in the works for both arty and antitank, but I can say that the day of the sabot is numbered. They have a round right now that will go thru 4" of Chobham armor like a punch press at 4K yards effortlessly. Generated recoil is a very small fraction, and breech life will be longer than the life of the barrel. Also the chance of a fire inside the turret is reduced to close to zero. You also will never ever need to clean a bore vac again! (I well remember cleaning that 300lb. chuck of iron on an M109)</p><p> </p><p>Just a side note: </p><p>anti personell has almost always been with a 50 caliber machine gun or a beehive round when folks are closer than 300 yards. Kind of a given fact of life. But there was one odd ball exception to this rule. The antipersonell round for a 175 gun was to simply lower the barrel to a minus three degree (somewhere in that area anyway). Load a zone three charge without the round, and pull the lanyard. The ball of fire and blast will make anything have a second thoughts. I like beehive rounds</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 636961, member: 25383"] ammunition shot in most tanks is known as "fixed ammunition", and is primarly designed for direct fire (line of sight). There has been some experimentation in the past with tanks shooting indirect fire (last I heard was with the M60), but the real issue with that is that tanks do not use a perfect plain to shoot off of (three point suspension). That's why we have self propelled guns. Just a completely different application of a round being shot. SPG's as a rule do not need super high velocity rounds like a tank does, but they must have a very precise form of location (and readjusting) fire because they usually can't see the target. Direct fire from an artillary piece is not very good setup, and one usually prays he never has to use that method (I have several times). I cannot tell you what's in the works for both arty and antitank, but I can say that the day of the sabot is numbered. They have a round right now that will go thru 4" of Chobham armor like a punch press at 4K yards effortlessly. Generated recoil is a very small fraction, and breech life will be longer than the life of the barrel. Also the chance of a fire inside the turret is reduced to close to zero. You also will never ever need to clean a bore vac again! (I well remember cleaning that 300lb. chuck of iron on an M109) Just a side note: anti personell has almost always been with a 50 caliber machine gun or a beehive round when folks are closer than 300 yards. Kind of a given fact of life. But there was one odd ball exception to this rule. The antipersonell round for a 175 gun was to simply lower the barrel to a minus three degree (somewhere in that area anyway). Load a zone three charge without the round, and pull the lanyard. The ball of fire and blast will make anything have a second thoughts. I like beehive rounds gary [/QUOTE]
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Is a barrel's resonant frequency static?
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