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- From: toby@stein.u.washington.edu (Toby Bradshaw)
- Newsgroups: rec.guns
- Subject: Re: Fluted barrel
- Message-ID: <1k6ceqINN96l@shelley.u.washington.edu>
- Date: 28 Jan 93 04:15:22 GMT
- Sender: magnum@mimsy.umd.edu
- Organization: University of Washington, Seattle
- Lines: 36
- Approved: gun-control@cs.umd.edu
-
- In article <9301261959.AA24576@appserv.Eng.Sun.COM> fiddler@concertina.Eng.Sun.COM (steve hix) writes:
- #The fluted barrel would be x% stiffer than an unfluted barrel of about
- #the same weight. The stiffness of a barrel (or other cylinder) increases
- #faster than the diameter increase. I used to know the function for
- #stiffness increase back when I was trying to decide between a skinny-tube
- #steel-frame bicycle and a fat-tube aluminum frame.
-
- Stiffness of a cylinder increases as the fourth power of diameter
- (twice the diameter, sixteen times the stiffness, check out a
- benchrest rifle) and decreases as the third power of length.
-
- #Fatter is better.
-
- Fatter is stiffer, and stiffer is better if the action can hold the
- weight of the barrel without bending (don't try this with a factory
- bolt action, especially one with a magazine cutout, or any single
- shot action). That's why BR rifles have sleeved factory actions,
- or custom actions of large diameter with minimum loading port.
- On big rifles, barrel blocks can be used to prevent action bending
- and rduce the effective length of the barrel (increases stiffness).
- Typical barrel diameter for 1000 yard BR is 1.350".
-
- Toby Bradshaw
- Department of Biochemistry and College of Forest Resources
- University of Washington, Seattle
- toby@u.washington.edu
-
- "A well-educated electorate being necessary to the prosperity of
- a free state, the right of the people to keep and read books, shall
- not be infringed." Do you think that banning legal possession of
- easily-concealed novels will stop criminals from reading?
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