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Joined: May 2005
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I think the bo-whoop trohpy should include a test...entry fee includes firing 5 each of unmarked shells (tested with identical velocity of course, but with markedly different burn-rate powders) and rating for recoil as part of the experiement to prove once and for all who's right.

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What?! And spoil all this fun?!

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Originally Posted By: David Furman
I think the bo-whoop trohpy should include a test...entry fee includes firing 5 each of unmarked shells (tested with identical velocity of course, but with markedly different burn-rate powders) and rating for recoil as part of the experiement to prove once and for all who's right.


They're allowing 1 & 1/4 ounce loads this year. If I win it with a higher pressure 1 ounce load, will Anna Nicole claim domestic abuse?


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Originally Posted By: EDM
Query: Does rate of burn really matter?

Assuming 1,100 fps at point of exit, 1,100 fps versus 2.5-foot barrel length means that the ejecta is going the barrel length to point of exit in 1/220th of a second (twice the 1/440th of a second of the ejecta going at 1,100 fps x 2.5 feet after exit at full speed). The average person's reaction time is about 3/10ths of a second or 66/220ths of a second. The travel time of the ejecta is about 66 times faster than the average person's mind works.


Good post. But human reaction time is not a measure of neurophysiological capacity to discriminate rates of acceleration. If I send identical letters to England - one by steamship, one by supersonic transport - both will be able to convey my meaning. The contents of the letter sent by steamship will not be degraded by virtue of having spent an extra week or so aboard ship.

Of course, communication can be degraded if the letterwriter and/or recipient are dunces. smirk

Sam

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Y'all need to try one of them Aubrey guns! whistle

FROM THE 1908 SEARS CATALOG: "Shooting qualities- As before explained, the shooting qualities of these guns are unequaled for long distance killing, long range shooting, for penetration, pattern or target. Both barrels are full choke bore, so firmly constructed that unlike other guns, there is no recoil or kicking. That which in other guns goes into recoil in the A J Aubrey gun goes to give greater force to the shot."

Last edited by Drew Hause; 04/15/10 03:01 PM.
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As lawyers like to say, the fact is: The ejecta all goes out the barrel in such a short time, different rates of acceleration are not detectable by the shooter. Therefore, the burning rate of the powder used is not a factor, only the weight of the powder charge. (maybe that's why burning rate of powder is not in the recoil formulas, nor is pressure, ya think?)

As always, nothing ever changes, neither minds nor more importantly, physics.
Good post, EDM.
Always fun

Last edited by Jim Legg; 04/15/10 03:22 PM.

> Jim Legg <

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something just ain't sinking in here. different rates of acceleration may not be detectable to the shooter. but the GREATER FORCE GENERATED BY THE GREATER RATE OF ACCELERATION IS!

go back to physics 101.

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Originally Posted By: fnb25
something just ain't sinking in here. different rates of acceleration may not be detectable to the shooter. but the GREATER FORCE GENERATED BY THE GREATER RATE OF ACCELERATION IS!

go back to physics 101.



You are referring to something like a "peak force", right? Two different energy curves produced by the two powders, each with the same total energy...yet the one that acts on the ejecta for a shorter duration requires a higher peak force in order to attain the same velocity?

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YES! thanks heavens somebody gets it. if something is accelerated 20% faster it will generate 20% more force. if the terminal velocity is the same as whatever you're comparing it to, the kinetic energy will be the same and even the momentum will be the same. but the FORCE will be 20% greater. how fast it occurs hasn't got a bloody thing to do with whether or not someone can feel it.

forget physics 101. 3rd grade math will do. all anybody has to be able to do is multiply 2 numbers together and tell that the result is a larger number than the comparison.

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OK, I agree with all of the peak pressure causes more felt recoil business. However, it doesn't apply to me because I use the slowest burning powder that will perform well in the weather in which I plan to use it. Don't we all?

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