"In the world of spuds today"
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MaxuS the 2nd
- Corporal 2
- Posts: 674
- Joined: Sat Jan 19, 2008 3:59 pm
Ahh, I was wondering whether it was 16 sides or 60 sides..... A hexdecagon is 16 sides.
Everything was done to an accuracy of +/- 10<sup>-9</sup>. Even when multiplied by 16 (for the number of triangles in the shape) hardly enough error to throw the results that far off.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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Brian the brain
- Moderator
- Posts: 3497
- Joined: Mon Dec 05, 2005 2:06 am
- Location: Holland
- Been thanked: 6 times
In the world of spuds today, I updated my thread on the 500 psi bbmg Machine Pistol I made and got ZERO response...
Hahaha
I do however feel satisfied with this new toy
http://www.spudfiles.com/forums/deathra ... 13762.html
Hahaha
I do however feel satisfied with this new toy
http://www.spudfiles.com/forums/deathra ... 13762.html
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
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SpudBlaster15
- First Sergeant 3
- Posts: 2400
- Joined: Wed Oct 18, 2006 11:12 pm
- Has thanked: 2 times
- Been thanked: 10 times
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 6:51 pm, edited 1 time in total.
Based on my interpretation of the situation, it is also impossible, which is the only reason I considered posting it. I might get around to posting all the calcs tomorrow, but I don't have a lot of time right now.
The shape was a hexdecagon inscribed in a circle.
The radius of both was 10 units, making the area of the circle 314.15926535... units<sup>2</sup>.
By calculating the area of one of the 16 triangles composing the sexdecagon and multiplying by 16, we came out with something like 322 units<sup>2</sup>
This was all done using coordinates of the points, eliminating any measuring inaccuracy (and also making it take a lot longer to do). We used d<sup>2</sup>=(x2-x1)<sup>2</sup>+(y2-y1)<sup>2</sup> to find the lengths of the various lines, Pythagorean theorem to confirm those calculations, and then the simple a=(bh)/2 to find the area of the triangle. I did the whole thing 3 times, and with 2 differing methods, and the whole thing was checked over by the teacher and anyone else who would take a look at it. No one found any source of the obviously massive error.
The shape was a hexdecagon inscribed in a circle.
The radius of both was 10 units, making the area of the circle 314.15926535... units<sup>2</sup>.
By calculating the area of one of the 16 triangles composing the sexdecagon and multiplying by 16, we came out with something like 322 units<sup>2</sup>
This was all done using coordinates of the points, eliminating any measuring inaccuracy (and also making it take a lot longer to do). We used d<sup>2</sup>=(x2-x1)<sup>2</sup>+(y2-y1)<sup>2</sup> to find the lengths of the various lines, Pythagorean theorem to confirm those calculations, and then the simple a=(bh)/2 to find the area of the triangle. I did the whole thing 3 times, and with 2 differing methods, and the whole thing was checked over by the teacher and anyone else who would take a look at it. No one found any source of the obviously massive error.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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SpudBlaster15
- First Sergeant 3
- Posts: 2400
- Joined: Wed Oct 18, 2006 11:12 pm
- Has thanked: 2 times
- Been thanked: 10 times
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 6:51 pm, edited 2 times in total.
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super spuder
- Corporal
- Posts: 558
- Joined: Fri Apr 06, 2007 9:05 pm
- Location: Ontario Canada
yea it has been a long time since i have posted on here. i kinda lost interest in spud guns for a few months. i didn't have any money cause i didn't have a job, but i got one now and the money flow is happening. My favorite pneumatic gun broke cause i forgot to put the bumper behind the piston. My advanced combustion is out of propane and i am too lazy to get more propane. My marble mini gun project prototype failed miserably, so that ended that project. Right now i am working on a BBMG. It should be done in a few weeks, depending on how much time i have to work on it.
trying to decide on a new project, probably something small.
Here's the shape, exactly as it was drawn:
Good guess dewey, but, taking a look at that, I think I've found the problem: 3<sup>2</sup> + 2<sup>2</sup>=13 and 4<sup>2</sup> + 1<sup>2</sup>=17. I measured one of the triangles with a base of ~4.123, while some of the triangles had a base of ~3.61. :facepalmheaddeskcombo:
Which means it actually has an area of ~300.3 units<sup>2</sup>.
I guess the simplest things can fool the best of us...
Good guess dewey, but, taking a look at that, I think I've found the problem: 3<sup>2</sup> + 2<sup>2</sup>=13 and 4<sup>2</sup> + 1<sup>2</sup>=17. I measured one of the triangles with a base of ~4.123, while some of the triangles had a base of ~3.61. :facepalmheaddeskcombo:
Which means it actually has an area of ~300.3 units<sup>2</sup>.
I guess the simplest things can fool the best of us...
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
Hehe self ownage, its always fun to see.
In the world of spuds today, I fired an 8 pound dart ~360 yards at 350 psi with the SCTBDC. It likely would have gone a lot farther (read 600 yards), but the breach exploded, the disk failed 100 psi early, and the sabot was so tight that it melted in the barrel...
Ya gotta love high pressure
There is a video, but it doesn't show much other than the BOOM and one frame of the dart leaving the end of the barrel.
And before anyone asks, I found the dart (which is 5 feet long and dark black), then paced of the distance, then checked it with Google Earth to be sure. The choice of such a heavy projectile was to allow me to actually see it flying. A 1 pound dart in 2" bore could easily reach 1 mile.
*Cue random cries of bullshit*
Ya gotta love high pressure
There is a video, but it doesn't show much other than the BOOM and one frame of the dart leaving the end of the barrel.
And before anyone asks, I found the dart (which is 5 feet long and dark black), then paced of the distance, then checked it with Google Earth to be sure. The choice of such a heavy projectile was to allow me to actually see it flying. A 1 pound dart in 2" bore could easily reach 1 mile.
*Cue random cries of bullshit*
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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elitesniper
- Sergeant
- Posts: 1090
- Joined: Sat Oct 13, 2007 8:40 pm