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/sci/ - Science & Math

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3027528 No.3027528 [Reply] [Original]

hey! first year on mech engineer here, as a assignment I have build a car, propulsed by a stirling engine made with recicled stuff, and with a chasis made out of paper. By car i mean like a toy, it has to cross the university hall only with a small burner and 100 ml of alcohol. any ideas or recomendations?

>> No.3027538
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3027538

OP here, wrong picture
btw not trolling

>>>> Stirling Engine

>> No.3027531

Is this what people do in university?

>> No.3027555

make the alcohol explode, giving the car enough force to travel across the hall... never said it had to be in one piece

>> No.3027563

>>3027528
I take it you get the stirling engine and don't have to build that yourself.

Pour the alcohol in a decapitated beer can, build a heat exchanger and hook the engine to the heatexchanger and drivetrain. Try to not set car on fire.

Or build an alcohol fueled jet/rocket engine and skip the stirling engine.

>> No.3027589

make the car as long as the hall!

>> No.3027600
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3027600

>>3027531
nope its just this course, the rest are mostly teoric

>>3027555
that would be awesome but dont really think is a good idea

>>3027563
yeah i have to build the engine with recicled stuff.

>> No.3027625

>>3027600
>>yeah i have to build the engine with recicled stuff.
>>first year on mech engineer here

what the hell
have you even done thermodynamics yet?

also "stirling engine" is pretty broad in terms of design...

>> No.3027634

>>3027555
... i dont think he will get a good grade for make a fire hazard going across the hall

>> No.3027659

A catapult.

>> No.3027661
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3027661

>>3027625
I know its hard, but we have a lot of time (like almost 2 months) and the theoric part its not that hard, its a simple sistem after all, but make it work is gonna be a hell

>> No.3027720

>>3027661

Realize that Stirling engines have very little torque, so you'll want your car to have very low rolling resistance or it won't even move!

>> No.3027738
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3027738

>>3027528
>engineer

>> No.3027751

It's spelled RECYCLED

Not recicled.

>> No.3027804

Use a catapult. It never said the thing had to arrive intact.

>> No.3027829

>>3027528
>mech engineer
What are you doing all that fancy shit for? Get back to your cubicle and start writing up the programs for the metal stamper! We've got deadlines to meet damnit!

>> No.3027839

>>3027528
1. buy an RC car and put batterys inside.
2. paint / glue the parts you were supposed to use on the car and make sure they cant see its an RC car.
3. ????
4. Profit/High grade

>> No.3027869
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3027869

>>3027720
i was thinking on using Pulleys

>>3027751
sorry im not a native english speaker

>>3027804
Not saying its a bad idea but i really have approve so im playing by the book

>>>pic my proyect so far

>> No.3027882

>>3027869
>so im playing by the book

That's no way to win.

But if you are going this rought, use graphite lubricant for the wheels, strip it down to as light as you possibly can.

Experiment with different types of alcohol to find the best mixture. 100% pure might not be the best.

>> No.3027928
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3027928

>>3027882
graphite lubricant seems a good idea gotta get some

>> No.3028125
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3028125

anyway thanks everyone fot the help!

>>>as is usual in /r/ here is your reward pic

>> No.3028463

use magnets!

>> No.3030276
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3030276

Make sure the front wheel is smaller than the back wheel, that way the car will be in constant downhill. Attatch engine for the lulz, and to make it seem real.

????
Good grade

:D enjoy