Author Topic: School Chemistry Project  (Read 331 times)

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Offline Foofoojack

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School Chemistry Project
« on: January 01, 2012, 10:07:13 PM »
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So around a month ago, my whole chemistry class was assigned a fairly large project - the whole class being split up in a number of independent groups.

So a group of me and 4 other people, have to construct a chemical reaction causing propellant, to propel a car.

The thing is, each person has a different job in the group, we have:

  • 2 group managers.
  • 1 chemical engineer.
  • 1 graphical design engineer.
  • 1 mechanical engineer.

I have the job of the mechanical engineer, the one who physically builds the car.

Here are some of the physical car requirements:

  • Must fit into a shoebox.
  • Must be less than 2 kilograms total mass.
  • CANNOT be constructed using any pre-existing model car or kit car.
  • Must travel 10 meters in a straight-as-possible line.
  • Must be able to carry 500mL of water or 500 grams of mass.

Furthermore, the car is going to be propelled by a black powder, consisting of the formulaic equation:

2 KNO3 + S + 3 C   --->  K2S + N2 + 3 CO2

Seeing as though it is a black powder, I'm lost at ideas of the physical car, the shape, form, product, material, of how it will be built.

Got any good ideas on how I could put it together? (Please try to be as serious as possible, and keep to only posting if you know what you're talking about.)

FYI, my father and step-father both work in the mechanical industry, so I have access to a lot of material.

Thanks!

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« Last Edit: January 01, 2012, 10:11:08 PM by Foofoojack »

Offline Cake Faice

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Re: School Chemistry Project
« Reply #1 on: January 01, 2012, 10:11:31 PM »
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My friend made an outer shell of his car with lego blocks and some wood + wood glue, but he made a compartment for a co2 cartridge. You could try the lego idea, make it black and snazzy and somewhat aerodynamic.

Offline Deacon

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Re: School Chemistry Project
« Reply #2 on: January 01, 2012, 10:36:51 PM »
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Wood is still a reputable way to go. skeletonize that shit

Offline Foofoojack

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Re: School Chemistry Project
« Reply #3 on: January 01, 2012, 10:41:01 PM »
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Wood and/or legos sounds pretty useful, but how would it be crafted to hold the black sulfuric powder?

Where would the powder go? What would hold it? What would make it secure?

Offline Deacon

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Re: School Chemistry Project
« Reply #4 on: January 01, 2012, 11:17:19 PM »
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Wood and/or legos sounds pretty useful, but how would it be crafted to hold the black sulfuric powder?

Where would the powder go? What would hold it? What would make it secure?

depends on your method of propulsion. black powder burns pretty quick.
How will you be using the black powder to propel your vehicle?

Offline Foofoojack

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Re: School Chemistry Project
« Reply #5 on: January 01, 2012, 11:34:38 PM »
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depends on your method of propulsion. black powder burns pretty quick.
How will you be using the black powder to propel your vehicle?

The black powder will propel through some sort of hole in the back of the car, inside of some sort of small container within the car itself, making it very compact and explosive. It'll be lit using whatever, and hopefully it'll go. I just don't know how/where to position the powder so it goes.

Offline Deacon

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Re: School Chemistry Project
« Reply #6 on: January 01, 2012, 11:42:15 PM »
+1
The black powder will propel through some sort of hole in the back of the car, inside of some sort of small container within the car itself, making it very compact and explosive. It'll be lit using whatever, and hopefully it'll go. I just don't know how/where to position the powder so it goes.

so, a black powder rocket engine
be careful
make many prototypes and stay the fuck back, you may end up with a bomb
try a small cylinder to contain the engine. one that fits into a hole in your chassis, so if something goes wrong the engine can be replaced without replacing the chassis

Offline Foofoojack

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Re: School Chemistry Project
« Reply #7 on: January 02, 2012, 01:21:12 AM »
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so, a black powder rocket engine
be careful
make many prototypes and stay the fuck back, you may end up with a bomb
try a small cylinder to contain the engine. one that fits into a hole in your chassis, so if something goes wrong the engine can be replaced without replacing the chassis

That's similar to what I was thinking, do you think PVC piping for a chassis and cylinder would contain it?

Offline Deacon

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Re: School Chemistry Project
« Reply #8 on: January 02, 2012, 01:27:10 AM »
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That's similar to what I was thinking, do you think PVC piping for a chassis and cylinder would contain it?

PVC is very versatile for a chassis, but you'd have to step the pressure rating up quite a bit to use as a motor housing. Don't forget, especially with black powder, anything like a rocket that is not constructed properly becomes (very quickly) a bomb.

Offline Deacon

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Re: School Chemistry Project
« Reply #9 on: January 02, 2012, 02:04:46 AM »
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DP. Also, Double post.

Did your group CHOOSE black powder as a method of propulsion, or is that a requirement?

Offline Foofoojack

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Re: School Chemistry Project
« Reply #10 on: January 02, 2012, 01:49:43 PM »
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DP. Also, Double post.

Did your group CHOOSE black powder as a method of propulsion, or is that a requirement?

That's what they agreed on, out of that, home-made fireworks, or a home-made battery.

Offline Seb

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Re: School Chemistry Project
« Reply #11 on: January 02, 2012, 03:02:49 PM »
+1
That's what they agreed on, out of that, home-made fireworks, or a home-made battery.

...aren't homemade fireworks illegal?
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Offline Foofoojack

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Re: School Chemistry Project
« Reply #12 on: January 02, 2012, 03:31:15 PM »
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...aren't homemade fireworks illegal?

Probably..

I don't know, I think that my previous propellant is clearly out of the equation though, seeing as it's gunpowder. (Yeah, I just now realized this.)

I'll have to think of some more ideas to get it moving..

Offline Deacon

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Re: School Chemistry Project
« Reply #13 on: January 02, 2012, 05:19:50 PM »
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Probably..

I don't know, I think that my previous propellant is clearly out of the equation though, seeing as it's gunpowder. (Yeah, I just now realized this.)

I'll have to think of some more ideas to get it moving..

Yeah this was my concern as well. Fucking lol.

So you need to carry a load, plus determine what provides enough thrust to move said load

Offline blαh2355

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Re: School Chemistry Project
« Reply #14 on: January 02, 2012, 05:32:54 PM »
+1
So you need to carry a load, plus determine what provides enough thrust to move said load
Dat metaphor