Self-Carving Exploding Pumpkin

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St0ney
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Thu May 19, 2011 12:38 pm

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Mad Science



Self-Carving Exploding Pumpkin

Would also work for a watermelon
[youtube][/youtube]


Materials Needed:

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a) A Med Sized REAL PUMPKIN or Watermelon with a Simple Carved design - like a Jack O Face
(Cut the Lid - NOT the Bottom)
DON'T USE A FOAM PUMPKIN !!!
It will start a Fire !

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b) 50 ml hydrogen peroxide (H2O2)

c) 20 ml water


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d) 7 pea-sized chips of calcium carbide (CaC2) You Can Buy on Ebay.

Click here to Buy

or Click Here

e) 1 empty tuna can
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f) a Long (Bic) Candle Lighter

g) oven mitt (to avoid getting burned)

h) You should wear ear protection.

i) Bucket of Water or Fire Extinguisher in case there's a Fire.

Steps:

1) Gut and Thin Pumpkin Walls.

2) Carve The Pumpkin with a Easy Design like a Jack O Face.
Place cut-outs pieces back into the Kin

3) Place a Small Hole in the Back of the Pumpkin Low, so you can light the gas with a Long (Bic) Candle Lighter. - Test that Lighter will fit through the Hole.

4) Pour hydrogen peroxide inside Pumpkin and swish the Kin around to get the peroxide on the walls.

5) Place the Chips of calcium carbide in the empty tuna Can, and Place inside the Pumpkin (Bottom Center).

6) Be sure the face of the pumpkin is facing away from you and that your audience is a safe distance from the demonstration.


7) Pour the Water over the calcium carbide (in the Can) and quickly Replace the pumpkin Lid. (An Explosive Gas will Form inside)

8) Allow about a 20 to 30 seconds for the acetylene (gas) to build up.


9) While holding down the lid of the pumpkin (with an oven-mitted hand), spark the lighter.

10) BOOM and Done.


DISCLAIMER:
Try at your Own Risk !

The Person doing this agrees to hold harmless St0ney or Stoneykins.com in any event, whether accident or injury, regarding the performing of this demonstration.

This demonstration should be performed by an adult
If the pieces of the pumpkin face are not loose, either the pumpkin will explode or else the explosion will be contained and the pumpkin will be uncarved.
I got one foot in the grave, the other on a banana peel !
The Pumpkin Carving Group - Facebook Group
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St0ney
The Boss with the Hot Sauce
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Thu May 19, 2011 12:40 pm

Yep there's Fire involved !!

[youtube][/youtube]


[youtube][/youtube]
I got one foot in the grave, the other on a banana peel !
The Pumpkin Carving Group - Facebook Group
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Doh
Evil Scientist and Inventor
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Thu May 19, 2011 4:36 pm

Gosh darn it St0ney!!! Do not teach me how to make another explosive.....I've already had the ATF looking for me once...long ago. (statute of limitations people)
Une étreinte est une étrangler vous n'avez pas encore terminé.
"Do not trust to hope...it has forsaken this land."
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St0ney
The Boss with the Hot Sauce
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Fri May 20, 2011 9:28 am

Sorry - LOL

It is a pretty cool effect,

And think for those who do carve in front of others. this would be a nice add on to the Carving Demo. I'll do it for my daughters Girl scout troop in OCT.

I will need to run a few test on my own, to see how far the pieces are blown out.
Safety First, But will say that many Science teachers do this in the classroom,
the kids are normally about 10 feet away.

Also having everyone 10 foot away, Hides the fact that the kin is Pre-Carved. ;)

I would Pre-Carve the Kin - way ahead of time, and Have the can and calcium carbide already prepared, this way I would just need to add the water then Light it.
I got one foot in the grave, the other on a banana peel !
The Pumpkin Carving Group - Facebook Group
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