Well...at least they tried.

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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1mile50
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Well...at least they tried.

Post by 1mile50 »

Not a bad article, but not exactly technically accurate.

http://www.cnn.com/2012/11/20/tech/inno ... ?hpt=hp_t2
hunter2
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Re: Well...at least they tried.

Post by hunter2 »

He needs to talk to somebody before he writes another article. Fact checker?????
tfbit
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Re: Well...at least they tried.

Post by tfbit »

Reads like it was written by a middle-school kid that barfed all his "gun knowledge" into an article.
No matter what you read on the intarweb CCI450s and CCI41s ARE NOT BALLISTICALLY IDENTICAL with H110! I'm also not a intarweb lawyer so I don't argue with anyone who is.
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coyote223
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Re: Well...at least they tried.

Post by coyote223 »

hunter2 wrote:He needs to talk to somebody before he writes another article. Fact checker?????
The lamestream media doesn't know what a fact is,,, :P
ada
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Re: Well...at least they tried.

Post by ada »

The article stated “For one, to keep a bullet from breaking the sound barrier -- 1,100 feet per second at sea level…”

This statement implies that the speed of sound is a function of altitude. The author needs to take a basic Aerodynamics course – speed of sound is a function of temperature, not altitude. Yes temperature in an Standard atmospheric model changes with altitude, but the calculation of the speed of sound is a function of temperature.

“The speed of sound in a perfect gas depends only on the temperature of the gas”. – From “Introduction to Flight” (4th Edition), Chapter 4 – Basic Aerodynamics, page 141 (see equation 4.54).

“A perfect gas is one in which the intermolecular forces are negligible” – same reference, p. 62. Air qualifies as a perfect gas.
Quiet Riot
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Re: Well...at least they tried.

Post by Quiet Riot »

Even the Air Force complicates the issue with chart titles, though this chart shows exactly what you are saying.

"Standard Altitude Table for Speed of Sound"
http://www.hill.af.mil/shared/media/doc ... 14-038.doc
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