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modular pie-cosahedron

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intromodular pie-cosahedron

constructing a pie with the topology of a sphere from 20 triangular sub-pie modules attached with amazing magnets.
modular pie-cosahedron
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step 1layout and cut the pieces

we needed 20 equilateral triangles. choosing an altitude of 12 inches let us easily lay out two strips of them on a 24x48 inch sheet of 24 gauge steel. in order to get th…


step 2fold and rivet the sides

folding the pans was greatly simplified by a 18inch bending brake. when you have to repeat some step 3*20 times, it's definitely worth setting up the appropriate jig. her…


step 3attach magnets

at this point, we thought it was time to glue the magnets on. we wanted to use 6 magnets (aquired from amazingmagnets.com) to join each edge. interestingly enough, if you…


step 4baking a test pie

it was time to bake a test pie. the doubters needed to know for sure that the pie would stand up to inversion. the answer was that, "yes it did". more importantly, the e…


step 5baking 19 more pies

gathering ingredients to make 20x pecan pies is still exciting, even after all these years. we used the recipe on the back of the karo bottle and added 1.5 tablespoons of …


step 6re-epoxy magnets

once the pies were cool, we re-attached the magnets. it is a little hard to describe accurately the sensation of wrestling with magnets that are incredibly small, incredib…


step 7assemble pie and enjoy

we wrapped each sub-pie-assembly in saran wrap to make it easier to transport and put together. the saran wrap was cut off once the pies were in place and ready to be serve…


72 comments
1-50 of 72
Nov 24, 2008. 11:32 AMcanida says:
This project was featured on NPR's Here & Now on Monday, November 24 2008!

Oct 14, 2009. 12:21 PMkrazipanda says:
what happens when u wwant to eat it?

Aug 8, 2009. 9:26 PMkingalexl says:
omg!!! it's a pie d20!
Jul 30, 2009. 7:48 PM1spartan95 says:
Calling all geeks and pie lovers!!!!!
Nov 22, 2007. 8:36 AMbrainmist says:
I'd just like to say - and I'm not one to exaggerate - but you, sir/madam, are a GOD. That's right, I've said it...you are clearly a minor deity at least of the juncture of geometry and pie. Geopastry, maybe. Nevermind the figuring-out-how-to-do-it, the sheer audacity of the idea merits you applause!

*erects a small shrine to Geopastronus, God of Pie and Angles (tm)*

Nov 27, 2008. 2:14 PMadamvan2000 says:
Surely you mean....*waits for the drum-roll*
Pie-angles?
:OD

~adamvan2000
Jan 9, 2009. 5:11 AMevanwehrer says:
:OD <-------has a big nose!!!

Jul 30, 2009. 7:45 PM1spartan95 says:
Or if you tilt your head to the right it's Homer Simpson!
Jul 17, 2009. 10:12 AMtechshop1 says:

You have way too much time on your hands. Wish I had time to play like that.
Enjoy it while you can.
Looks like a fun project - Great job!
Jun 11, 2009. 8:24 AMMillenniumMan says:
PIE is exactly 3!
Sorry, had to get the fat nerds attention away from the buffet table and back to the conference table.

Now, let's try to divide the pie by PI.
Jun 22, 2009. 5:24 PMAzayles says:
PIE divided by Pi is 0.95492965855137201461330258023509blahblahblah

Seems the nerd baiting worked :P
Nov 21, 2007. 4:30 PMmememememememe says:
But pie are squared!
Jun 3, 2009. 10:36 PMtanmanknex says:
hahaha!!! ROFLPMP!!!:D
Nov 22, 2007. 9:10 AMpirateykris says:
This made me rofl. Brilliant :)
Nov 6, 2007. 4:05 PMItsTheHobbs says:
pie and math, i dont like either but anyways this is great, and a great idea too
Jun 3, 2009. 10:30 PMtanmanknex says:
you don't like pie??? How could you?!?!?! I'm taking that as a personal insult!!! (JK)
Jan 9, 2009. 5:14 AMevanwehrer says:
GASP!!!
Nov 25, 2008. 5:17 AMPKTraceur says:
Did you just make a D20 pie??!?!?!?!
May 19, 2009. 10:39 AMREA says:
this would be great for a huge D&D party!
Dec 19, 2008. 6:28 PMWeather_blue says:
The ultimate in gamer food. I just failed my save vs. hunger. :)
Apr 3, 2009. 9:43 AMhishealer says:
AND A PECAN PIE FTW!!!
Apr 14, 2009. 1:55 PMThekal says:
Your ONE triangle away from a FULL trio of triforces..

power
courage
wisdom

...fail.
Mar 15, 2009. 7:13 PMspiffytessa says:
The awesomeness of this has left me speechless.
Nov 24, 2008. 12:44 PMkelseymh says:
Step 2: Nice T-shirt, dude! I can't quite tell if it's supposed to be vacuum corrections to e-e scattering, or Drell-Yan. Either way, sweet...
Nov 24, 2008. 1:32 PMkelseymh says:
Truly, truly hilarious. I wonder just how many crackpots have already posted their theories about bees navigating via quantum entanglement :-/

BTW, I see that your "Berkeley" location is now UCI. Congrats on the faculty position! I didn't know Irvine was that open to cross-disciplinary work (artificial vision and Drosophila epigenetic atlases; quite the mix).

Nov 24, 2008. 4:38 PMLithium Rain says:
WHAT?!

You mean they DON'T?!

All I've ever known is a lie...

Jan 9, 2009. 5:10 AMevanwehrer says:
The cake is a lie!!!
Jul 30, 2009. 7:46 PM1spartan95 says:
No, it's a truth that you deny!
Dec 3, 2008. 3:12 PMMr.NHRA says:
lots of pie.
Dec 1, 2008. 7:20 PMmynameisjonas says:
baking for the geometrically inclined.
Nov 29, 2008. 6:32 PMlittletom34 says:
The only thing that could've made that pie cooler would have been pecan numbers....

5 stars!
Nov 24, 2008. 8:35 PMChrissyStarr says:
This is crazy-good and WAY tops the fractal pie. Since you seemed to have solved the gravity issue, how about a mobius pie next year?
Nov 24, 2008. 1:52 PMdarkmuskrat says:
we mustn't let this technology into the hands of our enemy comrades :P
Nov 24, 2008. 1:19 PMPlasmana says:
That is the most amazing pie I ever saw!
Oct 23, 2008. 3:43 PMyutzwagon says:
Wow. Talk about gamer food...
Jun 24, 2008. 7:01 PMFlumpkins says:
Coolness.
Feb 5, 2008. 12:15 AMOrannis says:
A d20 made from pie?
This is so incredibly awesome. Should make this one day...
Jan 3, 2008. 2:10 PMGorillazMiko says:
What the heck!? This thing is insanely awesome!
Nice job.
Jan 3, 2008. 8:54 AMShifrin says:
Wow this is Awesome!
Dec 6, 2007. 2:15 PMcwant says:
Do you actually use a pie on the bottom face? I'm not sure I'd want to eat that piece!
Nov 28, 2007. 6:19 AMSecondSun says:
Isn't this technically a "pie holder" not a pie?

Its fun bit hard to eat....lol
Nov 26, 2007. 4:04 PMkid123 says:
Freakin SWEET... literally
Nov 23, 2007. 9:12 AMPiMan314 says:
PiMan approves!
Nov 23, 2007. 7:53 AMvoxitage says:
That's one delicious dreidel!
Nov 23, 2007. 7:40 AMPKM says:
Step 2, last picture- all you need is a huge drill on the other hand and a creepy little girl following you around...

I saw the pans were riveted, and thought "ah, you don't have to line with foil to protect the pie against the welding slag like those saps who made the... fractal pie.. wait, you are those saps! More maths and less welding FTW"

I am completely at a loss to imagine what you will bake next, the furthest reaches of my creative cooking are really huge snacks. Mmm, gargantuan Jaffa cake.

+

Dec 12, 2006. 7:43 PMjongscx says:
though not as geometrically profound, any plans for a perfectly spherical pecan pie? I don't know how you'd do it, whether zero and an oven or a big spinny (spin-y, not spine-y) thing and a blowtorch...

just a thought...
yeah, could you make a toroidal pie by using centrifugal "force" inside a circular section of pipe?
Nov 21, 2007. 10:47 PMOpus the Poet says:
Or you could use a Bundt pan. Remember the best solution is the simplest solution.

Opus
1-50 of 72

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