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- Path: sparky!uunet!elroy.jpl.nasa.gov!ames!nsisrv!mimsy!a.cs.okstate.edu
- From: rhoten@a.cs.okstate.edu (rhoten r p)
- Newsgroups: rec.guns
- Subject: Re: Stupid question time, again...
- Message-ID: <9212241612.AA19077@relay1.UU.NET>
- Date: 24 Dec 92 18:40:31 GMT
- Sender: magnum@mimsy.umd.edu
- Organization: Oklahoma State University, Computer Science, Stillwater
- Lines: 45
- Approved: gun-control@cs.umd.edu
-
- In article <1992Dec22.184105.19382@cbfsb.cb.att.com> osan@cbnewsb.cb.att.com (Mr. X) writes:
- #Hi Folks!
- #
- #I have a question that has been nagging at me for quite some time. Why is it
- #that large artillery guns can toss projectiles out the muzzle at velocities
- #so much higher than a shoulder arm? Is there any absolute reason why you could
- #not build a .30 rifle that spits a projectile down range at 10K fps, muzz. ?
- .....
- I don't really think artillary shells have that high a
- muzzle velocity. I recommendan excellent book
- _Interior Ballisitcs of Guns_, edited by Herman Krier
- and Martin Summerfield, Vol. 66, Progress in Astronautics and
- Aeronautics, published by the American Institute of Aeronautics and
- Astronautics, 1979.
-
- In one of the included papers by Krier and Adams some sample
- figures are given for the 175-mm M113 gun system-
- a projectile of about 148 lbm, 352 inch bore length, maximum breech
- pressure of about 50 kpsi and muzzle velocities of around 3000 fps.
- About like your typical .308 except for the bore length
- and projectile size!
-
- In a paper on high muzzle velocity guns, some interesting
- laboratory results are described, including heating a
- chamber full of hydrogen with an electric arc discharge
- (18,000 fps), chambers with step-down piston
- systems (22,670 fps for a 2.5-g projectile!) and chambers
- sealed with disks that didn't rupture until maximum pressures
- were reached.
-
- Finally, for a historical note, the book _Respectfully Yours,
- H. M. Pope_ (for those who don't know the name H. M. Pope,
- we was the finest barrel maker of all time - died in 1950)
- there is a letter to Pope from F. W. Mann (the most famous
- "gun nut experimentor" of all time) dated Oct. 30, 1916
- ordering a smoothbore 30 caliber barrel for high velocity
- tests with steel bullets Mann turned on his lathe. He
- claimed having gotten to 6000 fps, but was ruining
- barrels because of gas blowby, and wanted a fine
- Pope barrel for better sealing.
-
- r. p. rhoten
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