Mathematics formulas…..
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Mathematics formulas…..
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Last edited by Ray on Fri Apr 08, 2022 4:55 am, edited 2 times in total.
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- GunnyMack
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Re: Mathematics formulas…..
From your title I wasn't expecting this, good info none the less!
Now what I WAS expecting was
Pie r round corn bread r square
Now what I WAS expecting was
Pie r round corn bread r square
BROWN LABS MATTER !!
Re: Mathematics formulas…..
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Last edited by Ray on Fri Apr 08, 2022 4:55 am, edited 1 time in total.
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- vancelw
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Re: Mathematics formulas…..
For pi did you use 3.14159265359, 3.14 or 22/7?
I got a chuckle researching drilling markings the other day and reading discussions about plug gauge vs. Bore diameter.
I got a chuckle researching drilling markings the other day and reading discussions about plug gauge vs. Bore diameter.
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Re: Mathematics formulas…..
355/113 is really close...one of the first computer programs I ever wrote was a routine to start with n=0 and d=1, incrementing n until n/d>pi, saving ]((n-1)/d)-pi[, then if ](n/d)-pi[ was smaller, save it and discard the previous value. Then increment d and reset n=0, and repeat the process, saving the next "]((n-1)/d)-pi[" only if it was smaller than the previous saved one (the programmable calculator of the day back then only had three memory registers), and continue the process. It took a minute or so to get to 355/113, but on up into 4 or 5 digits I don't think it found a closer match.
Now days a computer could carry that into ten digits faster than you could say "pi", but I couldn't even begin to figure out how to do that on a 'windows' machine though...
I always thought it would be nice to teach my kids basic programming, but I don't even know if they make programming languages and compilers like the ones I used; you could use TurboPascal to do about anything, including embedding assembly language code if you wanted something really fast.
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Want REAL change? . . . . . "Boortz/Nugent in 2012 . . . ! "
- vancelw
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Re: Mathematics formulas…..
The problem with that is, you had to know the value of pi to find the fraction it was closest to.
Old gun makers didn't know the exact value of pi and had to do all calculations by hand. So using a modern value of pi might not get the results y oy seek when trying to convert gauge to diameter. The same goes for the specific gravity of lead. You'd need to use the value the old gun makers used
Old gun makers didn't know the exact value of pi and had to do all calculations by hand. So using a modern value of pi might not get the results y oy seek when trying to convert gauge to diameter. The same goes for the specific gravity of lead. You'd need to use the value the old gun makers used
"Make yourself an honest man, and then you may be sure that there is one less scoundrel in the world." - Thomas Carlyle
Re: Mathematics formulas…..
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Last edited by Ray on Fri Apr 08, 2022 4:55 am, edited 1 time in total.
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- Griff
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Re: Mathematics formulas…..
My head hurts after reading this... there was a reason I was an English major!
Griff,
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AND... I'm over it!!
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SASS/CMSA #93
NRA Patron
GUSA #93
There is a fine line between hobby & obsession!
AND... I'm over it!!
No I ain't ready, but let's do it anyway!
Re: Mathematics formulas…..
I like to use rhubarb for pi
Gettin old ain't for sissies!
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There just has to be dogs in heaven !
Re: Mathematics formulas…..
Where did those cylinders graduate from, and did they graduate magnum gun loud.Ray wrote: ↑Fri Oct 13, 2017 3:38 pmactually pi r square is needed to cipher that last method of measurement since it is cylindrical….but it was whole lot easier just to do the simple math re. length/ratio, cut a stub of the barrel, plug one end and fill with powder…..then a more suitable charger would be fashioned from tubing or antler/bone or even Physeter macrocephalus tooth with the same volume….
I use clear medical graduated cylinder sample tubes using the 15 gr. of powder guestimation per cubic centimeter which quickly gives me 60, 75, and 90 grains volume that I use most frequently….the tubes are used for both chargers and, with top screwed-on, for holding pre-measured charges….
D. Brian Casady
Quid Llatine Dictum Sit, Altum Viditur.
Advanced is being able to do the basics while your leg is on fire---Bill Jeans
Don't ever take a fence down until you know why it was put up---Robert Frost
Quid Llatine Dictum Sit, Altum Viditur.
Advanced is being able to do the basics while your leg is on fire---Bill Jeans
Don't ever take a fence down until you know why it was put up---Robert Frost
Re: Mathematics formulas…..
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Last edited by Ray on Fri Apr 08, 2022 4:56 am, edited 1 time in total.
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Re: Mathematics formulas…..
It was just some lab humor.
D. Brian Casady
Quid Llatine Dictum Sit, Altum Viditur.
Advanced is being able to do the basics while your leg is on fire---Bill Jeans
Don't ever take a fence down until you know why it was put up---Robert Frost
Quid Llatine Dictum Sit, Altum Viditur.
Advanced is being able to do the basics while your leg is on fire---Bill Jeans
Don't ever take a fence down until you know why it was put up---Robert Frost
Re: Mathematics formulas…..
Arf?
I remember that the "correct" amount of powder was to put the ball on a sheet of paper, and slowly pour BP over the top until the ball was completely covered. Beats me. On my old .54 Renegade the max load was 120 of Pyrodex P and I would load 30-40 for plinking and squills...
The Rotten Fruit Always Hits The Ground First
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Proud Life Member Of:
NRA
Second Amendment Foundation
Citizens Committee For The Right To Keep And Bear Arms
DAV
Re: Mathematics formulas…..
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Last edited by Ray on Fri Apr 08, 2022 4:56 am, edited 1 time in total.
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Re: Mathematics formulas…..
The Pyrodex P burns slower than FFFG.This was a 1980 kit. That load was mentioned in the instructions from T/C. As a matter of fact, Pyrodex R was the second choice in the book if you didn't want to use black. PDex was harder to ignite than black, and the "P" was easier to light off than the "R".... The T/C figures for 120 gr of "P" was 2,000 fps...BTW, 90 grains was more than enough for me. That 120 gr load was not that accurate, as is most max loads...
BTW, I have no idea what other loads other rifles are using. Just this one particular T/C .54 Renegade. I might be crazy, but I'm not stupid.
The Rotten Fruit Always Hits The Ground First
Proud Life Member Of:
NRA
Second Amendment Foundation
Citizens Committee For The Right To Keep And Bear Arms
DAV
Proud Life Member Of:
NRA
Second Amendment Foundation
Citizens Committee For The Right To Keep And Bear Arms
DAV