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Posted: 11/21/2012 3:15:06 PM EST
Link Posted: 11/21/2012 3:15:44 PM EST
87
Link Posted: 11/21/2012 3:15:59 PM EST
umm..... not a rimmed cartridge so I don't know.
Link Posted: 11/21/2012 3:16:59 PM EST
Link Posted: 11/21/2012 3:20:59 PM EST

Originally Posted By dpmmn:
why is the said 9mm loaded in a mag?

not loaded? Your statement hurts my brain.

I just put four components together to make it.
Link Posted: 11/21/2012 3:22:39 PM EST
Logic problem.

The answer is 1.


Link Posted: 11/21/2012 3:22:49 PM EST
Originally Posted By sburggsx:
umm..... not a rimmed cartridge so I don't know.


Tapered.

It will make a circle eventually.
Link Posted: 11/21/2012 3:23:57 PM EST
The case is tapered, but not knowing exactly what angle it's tapered at, I couldn't tell you. It'd be a huge fucking circle though!
Link Posted: 11/21/2012 3:25:45 PM EST

Originally Posted By Beretta92F:
The case is tapered, but not knowing exactly what angle it's tapered at, I couldn't tell you. It'd be a huge fucking circle though!

what if you didn't lay them horizontal (uses the taper), but vertical

oh the noes
Link Posted: 11/21/2012 3:27:13 PM EST
[Last Edit: 11/21/2012 3:34:32 PM EST by Bob243]
789.4


ETA, now that I am thinking about it more.. it may only be half that amount From the base up the side is a 89.544 angle.. there are two of them... so yea, it should only be approx 395
Link Posted: 11/21/2012 3:29:03 PM EST
Such an ambiguous request...

Define circle.
Link Posted: 11/21/2012 3:30:18 PM EST
[Last Edit: 11/21/2012 3:34:43 PM EST by RRA_223]
Originally Posted By TheJammer:
Such an ambiguous request...

Define circle.


three.


_
\/


Either that, or it would be "an infinite amount" as no man-made "circle" could have a perfect radius using shells.

I assume OP was trying to say "how many shells would it take of 9mm shells laying side-by-side to form a complete loop (or circle)?" like this:



except that 9mm luger has a rebated rim with only a slight taper to the case itself to create the arc - so it would likely take tens of thousands to make a really big circle.
Link Posted: 11/21/2012 3:34:42 PM EST

Originally Posted By TaylorWSO:

Originally Posted By Beretta92F:
The case is tapered, but not knowing exactly what angle it's tapered at, I couldn't tell you. It'd be a huge fucking circle though!

what if you didn't lay them horizontal (uses the taper), but vertical

oh the noes
How many rounds of 9mm standing next to one another would it take to circle the globe?

Link Posted: 11/21/2012 3:34:59 PM EST
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


Link Posted: 11/21/2012 3:35:31 PM EST

Originally Posted By Bob243:
789.4


ETA, now that I am thinking about it more.. it may only be half that amount From the base up the side is a 89.544 angle.. there are two of them... so yea, it should only be approx 395

I'll give it a try. Be back in a minute...
Link Posted: 11/21/2012 3:37:35 PM EST

Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


That's the idea. Looks like way more the 395.
Link Posted: 11/21/2012 3:37:48 PM EST
Originally Posted By rippersde50:

Originally Posted By TaylorWSO:

Originally Posted By Beretta92F:
The case is tapered, but not knowing exactly what angle it's tapered at, I couldn't tell you. It'd be a huge fucking circle though!

what if you didn't lay them horizontal (uses the taper), but vertical

oh the noes
How many rounds of 9mm standing next to one another would it take to circle the globe?



Approximating the diameter of a 9mm luger case, with the circumference of the earth being around 24,900 miles...

around 4,004,384,000 cartridges.
Link Posted: 11/21/2012 3:38:33 PM EST

Originally Posted By Lord_Grey_Boots:
Logic problem.

The answer is 1.



This
Link Posted: 11/21/2012 3:40:44 PM EST
[Last Edit: 11/21/2012 3:41:38 PM EST by fatalerror113]

Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


If you could get a picture from directly overhead, we could sketch out some geometry and calculate the radius of that arc.

Oh, but you'd have to make it more true, as I see you have some errors there.....
Link Posted: 11/21/2012 3:41:54 PM EST

Originally Posted By fatalerror113:

Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


If you could get a picture from directly overhead, we could sketch out some geometry and calculate the radius of that arch.

Snipe hunt.

The irregularities in the cases caused by the bullet crimp fucks the whole system up.
Link Posted: 11/21/2012 3:43:01 PM EST

Originally Posted By savageoneseven:

Originally Posted By fatalerror113:

Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


If you could get a picture from directly overhead, we could sketch out some geometry and calculate the radius of that arch.

Snipe hunt.

The irregularities in the cases caused by the bullet crimp fucks the whole system up.

Fuck.
Link Posted: 11/21/2012 3:43:15 PM EST
[Last Edit: 11/21/2012 3:46:16 PM EST by Bob243]

Originally Posted By rippersde50:

Originally Posted By TaylorWSO:

Originally Posted By Beretta92F:
The case is tapered, but not knowing exactly what angle it's tapered at, I couldn't tell you. It'd be a huge fucking circle though!

what if you didn't lay them horizontal (uses the taper), but vertical

oh the noes
How many rounds of 9mm standing next to one another would it take to circle the globe?


1,281,145,665.3 assuming at equator
eta answer previously is correct... I forgot to factor in pi
Link Posted: 11/21/2012 3:44:26 PM EST
[Last Edit: 11/21/2012 3:54:54 PM EST by SW-14]
My count is 363 364 on a 21.5255 inch radius circle.





*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.
Link Posted: 11/21/2012 3:46:14 PM EST


fancy compuder type stuff goin' on in this thread!
Link Posted: 11/21/2012 3:49:19 PM EST
[Last Edit: 11/21/2012 3:50:27 PM EST by Bob243]


What was your base and neck diameter and C.O.A.L ?
Link Posted: 11/21/2012 3:49:32 PM EST
Fucking nerds! Your hurting my brain!
Link Posted: 11/21/2012 3:52:06 PM EST
[Last Edit: 11/21/2012 3:52:26 PM EST by SW-14]
Originally Posted By Bob243:


What was your base and neck diameter and C.O.A.L ?


I used these dimensions (in mm):

Link Posted: 11/21/2012 3:52:18 PM EST

Originally Posted By fatalerror113:

Originally Posted By savageoneseven:

Originally Posted By fatalerror113:

Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


If you could get a picture from directly overhead, we could sketch out some geometry and calculate the radius of that arch.

Snipe hunt.

The irregularities in the cases caused by the bullet crimp fucks the whole system up.

Fuck.

Close as I'm gonna get. Here toy go.


Link Posted: 11/21/2012 3:53:08 PM EST

Originally Posted By RRA_223:
Originally Posted By rippersde50:

Originally Posted By TaylorWSO:

Originally Posted By Beretta92F:
The case is tapered, but not knowing exactly what angle it's tapered at, I couldn't tell you. It'd be a huge fucking circle though!

what if you didn't lay them horizontal (uses the taper), but vertical

oh the noes
How many rounds of 9mm standing next to one another would it take to circle the globe?



Approximating the diameter of a 9mm luger case, with the circumference of the earth being around 24,900 miles...

around 4,004,384,000 cartridges.
I'll be reloading a while.

Link Posted: 11/21/2012 3:54:16 PM EST


THis guy wins.
Link Posted: 11/21/2012 3:57:21 PM EST

Originally Posted By rippersde50:

Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.


That's the idea. Looks like way more the 395.

Huh, looks like Bob243 wasn't too far off.
Link Posted: 11/21/2012 3:58:26 PM EST
Originally Posted By SW-14:
My count is 363 364 on a 21.5255 inch radius circle.

http://img.photobucket.com/albums/v249/SW-14/9mmcircle1.jpg

http://img.photobucket.com/albums/v249/SW-14/9mmcircle2.jpg

*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.


And that's why shit crashes into Mars!

Forgot 1!!!!




Just flipen ya crap. Nice drawing!
Link Posted: 11/21/2012 4:00:35 PM EST
[Last Edit: 11/21/2012 4:30:32 PM EST by DrFeelgood]
Using the following:

9.96 mm rim
9.65 mm case neck
19.15 mm case length

...it takes 388 cases to form a circle with a 1.5 mm gap in one place. The circle has a radius of 615.27119 mm (24.2232752 inches) and a circumference of 3865.86288 mm (152.199326 inches).

Edit for case length, just a typo.

EATA: I forgot about the 0.3 mm rebate of the rim so based on that geometry, I get 382 cartridges with a .665 mm gap in a circle of radius 605.93230 mm (23.8556024 inches) and a circumference of 3807.18495 mm (149.889171 inches).


Ugh, I blew it again. New analysis below.
Link Posted: 11/21/2012 4:05:25 PM EST
Originally Posted By SW-14:
My count is 363 364 on a 21.5255 inch radius circle.

http://img.photobucket.com/albums/v249/SW-14/9mmcircle1.jpg

http://img.photobucket.com/albums/v249/SW-14/9mmcircle2.jpg

*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.


Oh cool! We could make some sort of cute calendar out of them! Cause Fuck February.
Link Posted: 11/21/2012 4:07:26 PM EST

Originally Posted By sabergeron:
Originally Posted By SW-14:
My count is 363 364 on a 21.5255 inch radius circle.

http://img.photobucket.com/albums/v249/SW-14/9mmcircle1.jpg

http://img.photobucket.com/albums/v249/SW-14/9mmcircle2.jpg

*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.


Oh cool! We could make some sort of cute calendar out of them! Cause Fuck February.

Thats a hell of an idea
Link Posted: 11/21/2012 4:19:22 PM EST
Originally Posted By SW-14:
Originally Posted By Bob243:


What was your base and neck diameter and C.O.A.L ?


I used these dimensions (in mm):

http://upload.wikimedia.org/wikipedia/commons/thumb/4/41/9x19mm_Parabellum.svg/740px-9x19mm_Parabellum.svg.png



OUCH!!!! Brain Freeze!
Link Posted: 11/21/2012 4:25:15 PM EST

Originally Posted By DrFeelgood:
Using the following:

9.96 mm rim
9.65 mm case neck
19.15 mm case length

...it takes 388 cases to form a circle with a 1.5 mm gap in one place. The circle has a radius of 615.27119 mm (24.2232752 inches) and a circumference of 3865.86288 mm (152.199326 inches).

Edit for case length, just a typo.

EATA: I forgot about the 0.3 mm rebate of the rim so based on that geometry, I get 382 cartridges with a .665 mm gap in a circle of radius 605.93230 mm (23.8556024 inches) and a circumference of 3807.18495 mm (149.889171 inches).


I don't have enough ammo to complete the circle. Someone else needs to step up.

Or...they could send me the ammo, and I'll do it for them. I could use some 9mm anyway. That's my only box of FMJ.
Link Posted: 11/21/2012 4:25:18 PM EST
Originally Posted By DrFeelgood:
Using the following:

9.96 mm rim
9.65 mm case neck
19.15 mm case length

...it takes 388 cases to form a circle with a 1.5 mm gap in one place. The circle has a radius of 615.27119 mm (24.2232752 inches) and a circumference of 3865.86288 mm (152.199326 inches).

Edit for case length, just a typo.

EATA: I forgot about the 0.3 mm rebate of the rim so based on that geometry, I get 382 cartridges with a .665 mm gap in a circle of radius 605.93230 mm (23.8556024 inches) and a circumference of 3807.18495 mm (149.889171 inches).


Yep, now that I'm actually doing the math I'm getting about the same numbers. Radius of 605.63225806451612903225806451613 mm (haha) and 382 rounds.
Link Posted: 11/21/2012 4:29:58 PM EST

Originally Posted By DrFeelgood:
Using the following:

9.96 mm rim
9.65 mm case neck
19.15 mm case length

...it takes 388 cases to form a circle with a 1.5 mm gap in one place. The circle has a radius of 615.27119 mm (24.2232752 inches) and a circumference of 3865.86288 mm (152.199326 inches).

Edit for case length, just a typo.

EATA: I forgot about the 0.3 mm rebate of the rim so based on that geometry, I get 382 cartridges with a .665 mm gap in a circle of radius 605.93230 mm (23.8556024 inches) and a circumference of 3807.18495 mm (149.889171 inches).

Originally Posted By SW-14:
My count is 363 364 on a 21.5255 inch radius circle.

http://img.photobucket.com/albums/v249/SW-14/9mmcircle1.jpg

http://img.photobucket.com/albums/v249/SW-14/9mmcircle2.jpg

*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.

Looks like we need some real world tests. Break out the 9mm!

Link Posted: 11/21/2012 4:36:04 PM EST
Since I neglected to see that the "lower" point of contact is actually the upper corner of the rim, I ran it again:

362 cartridges with a 4.05 mm gap in a circle with radius 575.73889 mm (22.6668854 inches) and circumference of 3617.47412 mm (142.420241 inches).

Just a 2D line drawing in Autocad 2000, but I'm confident with it now. Off to brine a turkey, since my brain power is clearly at a daily low.
Link Posted: 11/21/2012 4:40:23 PM EST
Originally Posted By SW-14:
Originally Posted By Bob243:


What was your base and neck diameter and C.O.A.L ?


I used these dimensions (in mm):

http://upload.wikimedia.org/wikipedia/commons/thumb/4/41/9x19mm_Parabellum.svg/740px-9x19mm_Parabellum.svg.png[/







mm....wtf this isn't Europe . Probably using a French program also.
Link Posted: 11/21/2012 4:49:44 PM EST
9mm: round of the nerds.

10mm: round for those who don't give a fuck.
Link Posted: 11/21/2012 4:55:25 PM EST
BRAIN FREEZE
Link Posted: 11/21/2012 5:12:35 PM EST
[Last Edit: 11/21/2012 5:14:12 PM EST by FrozInAK]
With the numbers in the picture.

362.863

The total angle of the taper on a 9x19 is .9921* with half of that per side in the perfect world. I used trigonometry to get the angle on one side and figured out how many sets of angles(360 / angleoftaper) to complete one circle, or 360*. Seemed too simple so I checked back here and someone was already on it.

SOrry, no fancy diagrams here.
Link Posted: 11/21/2012 5:37:07 PM EST
[Last Edit: 11/21/2012 5:39:21 PM EST by Bounce19712]
stooopid goawwddamndfck idis, whenever you figure by 9 you get xero.....there is nothing divisible by (mm. gdfI's.
Link Posted: 11/21/2012 5:44:00 PM EST
Originally Posted By SW-14:
My count is 363 364 on a 21.5255 inch radius circle.

http://img.photobucket.com/albums/v249/SW-14/9mmcircle1.jpg

http://img.photobucket.com/albums/v249/SW-14/9mmcircle2.jpg

*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.


Someone played with a slide rule in HS...
Link Posted: 11/21/2012 5:49:00 PM EST

Originally Posted By 220ST:
9mm: round of the nerds.

10mm: round for those who don't give a fuck.
Sorry. I should have asked:

Would it only take one 10mm round to destroy the moon?


Link Posted: 11/21/2012 5:56:02 PM EST
Originally Posted By FrozInAK:
With the numbers in the picture.

362.863

The total angle of the taper on a 9x19 is .9921* with half of that per side in the perfect world. I used trigonometry to get the angle on one side and figured out how many sets of angles(360 / angleoftaper) to complete one circle, or 360*. Seemed too simple so I checked back here and someone was already on it.

SOrry, no fancy diagrams here.


9mm laid side by side does not make a circle. If your calcs are right, it proves it.
Link Posted: 11/21/2012 6:19:36 PM EST
Originally Posted By SW-14:
My count is 363 364 on a 21.5255 inch radius circle.

http://img.photobucket.com/albums/v249/SW-14/9mmcircle1.jpg

http://img.photobucket.com/albums/v249/SW-14/9mmcircle2.jpg

*edit* Actually, make that 364. I forgot to include the original round I patterned in my count.


Soldworks?

Posted Via AR15.Com Mobile
Link Posted: 11/21/2012 6:32:48 PM EST
[Last Edit: 11/21/2012 6:35:08 PM EST by Woodsrider]
Originally Posted By savageoneseven:
A shitbunch.

50 rds. That's a 16" floor tom holding the glass tabletop up.



NM
Link Posted: 11/21/2012 8:46:49 PM EST
400 rounds on a 24x48 scrap of 1/2" plywood:


Realized that I needed a bigger piece (d = 2r, duh) so grabbed a spare piece of MDF and got to assembling. Here's 362 rounds in as near a circle as I can get by eye this late:


The difficulty of aligning them makes this a futile exercise for all practical purposes. I could just as easily have built a tight circle with 400 rounds as with 200 rounds.
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