Would my Alfa's V6 run on Jupiter?
Discussion
Just a bit of fun, not a serious question!
Forget the car, imagine an NA engine on a stand...
I guess the simple answer is no, Jupiter is a gas giant and as such the engine would fall to the centre and be generally crushed by pressure and temperature.
But expanding upon the premise, if Jupiter had a solid surface, it still wouldn't run unless you changed the fuel system to inject oxygen rather than fuel.
Moving on to a hypothetical planet. One that has a surface and atmosphere the same as earth but everything else being the same as jupiter it still wouldn't start due to the extreme cold.
Changing Hypo Planet's temp to the same as earths, it still wouldn't run would it? Give jupiter has 2.4 x the gravity of earth, atmospheric pressure would make a mess of it pretty quickly... It would be like strapping a hoofing great turbo or 2 to it.
And then there would be issues with the oil system, the weight of the reciprocating parts etc... (or is this where mass comes into play?)
Why else wouldn't it work or break?
Forget the car, imagine an NA engine on a stand...
I guess the simple answer is no, Jupiter is a gas giant and as such the engine would fall to the centre and be generally crushed by pressure and temperature.
But expanding upon the premise, if Jupiter had a solid surface, it still wouldn't run unless you changed the fuel system to inject oxygen rather than fuel.
Moving on to a hypothetical planet. One that has a surface and atmosphere the same as earth but everything else being the same as jupiter it still wouldn't start due to the extreme cold.
Changing Hypo Planet's temp to the same as earths, it still wouldn't run would it? Give jupiter has 2.4 x the gravity of earth, atmospheric pressure would make a mess of it pretty quickly... It would be like strapping a hoofing great turbo or 2 to it.
And then there would be issues with the oil system, the weight of the reciprocating parts etc... (or is this where mass comes into play?)
Why else wouldn't it work or break?
Petrol freezes at about -44 to -60 Celsius which is cold but not THAT cold - several places on this planet have recorded lower temperatures. Convert to LPG and you'll get down to about -150 Celsius. Probably be better with an air-cooled engine to be honest!
Extreme gravity - presumably at some point the valves will get too heavy for the springs to hold them shut?
Zero gravity - your engine will be merrily spinning round at a few thousand RPM...
Extreme gravity - presumably at some point the valves will get too heavy for the springs to hold them shut?
Zero gravity - your engine will be merrily spinning round at a few thousand RPM...
Zombie said:
mybrainhurts said:
If you farted in zero gravity, how far would it propel you and what speed would you achieve?
Given that everything in the universe is moving could you actually determine how fast you would be going? - There is no static reference point.Halmyre said:
Speak for yourself, piccolo-sphincter.
Just like the sausage thread last week, a bit of maths tells you everything you need to know about flatulence propulsion as a method of directing oneself across the infinite void....
So yeah, a top speed of mm's per hour, I doubt longer and/or bigger farts wouldn't do much to that speed.
Fugazi said:
Halmyre said:
Speak for yourself, piccolo-sphincter.
Just like the sausage thread last week, a bit of maths tells you everything you need to know about flatulence propulsion as a method of directing oneself across the infinite void....
So yeah, a top speed of mm's per hour, I doubt longer and/or bigger farts wouldn't do much to that speed.
But,
On the basis of 10 farts per day, you'd be doing 10mm per hour, 3.65m/s by the end of the year...
Can that be taken to it's logical conclusion - after 76 odd years you'd be doing 277.4m/s?
Or do other factors come into play?
Kinetic energy = 1/2mv^2
Which suggests, the faster you go, the more energy is required to get there?
Or will you just max out at 3m/s?
(In my defence I have been drinking tonight...)
Zombie said:
PMSL!
But,
On the basis of 10 farts per day, you'd be doing 10mm per hour, 3.65m/s by the end of the year...
Can that be taken to it's logical conclusion - after 76 odd years you'd be doing 277.4m/s?
Or do other factors come into play?
Kinetic energy = 1/2mv^2
Which suggests, the faster you go, the more energy is required to get there?
Or will you just max out at 3m/s?
(In my defence I have been drinking tonight...)
Now this is where it gets interesting, without going into too much detail I'll try to explain. You can travel faster than the exhaust speed of a jet and to understand why it's probably easier to think about this scenario as conservation of momentum. If we consider the person farting to be a rocket: i.e. they contain a propellant which is ejected at But,
On the basis of 10 farts per day, you'd be doing 10mm per hour, 3.65m/s by the end of the year...
Can that be taken to it's logical conclusion - after 76 odd years you'd be doing 277.4m/s?
Or do other factors come into play?
Kinetic energy = 1/2mv^2
Which suggests, the faster you go, the more energy is required to get there?
Or will you just max out at 3m/s?
(In my defence I have been drinking tonight...)
dV = Ve*ln(m0/mf)
dV change in speed
Ve Speed of exhaust jet
m0 total mass including propellant
mf final mass after propellant is used
So although the ratio between the mass of the person before and after and the fart will be a fraction above 1, it is still generates a positive value for dV and so the person farting will slowly start to travel at speeds above that produced by a fart. Given enough time and fart producing foodstuffs, I'm sure you could build up some very high speeds
Ps: This is starting to become remarkably like one of the questions found on the What If? and Wait, but why? websites...
Edited by Fugazi on Tuesday 24th May 13:01
I don't know about the Alfa running, but seeing as Jupiter will crush a flying submarine I'd have my doubts lol
https://what-if.xkcd.com/138/
https://what-if.xkcd.com/138/
http://jalopnik.com/a-nascar-team-is-building-the-...
Looks like an inline six ICE engine might get launched into space !
Quite an interesting article and concept actually
Looks like an inline six ICE engine might get launched into space !
Quite an interesting article and concept actually
John_S4x4 said:
http://jalopnik.com/a-nascar-team-is-building-the-...
Looks like an inline six ICE engine might get launched into space !
Quite an interesting article and concept actually
Hadn't seen that, thanks for the link.Looks like an inline six ICE engine might get launched into space !
Quite an interesting article and concept actually
You'd have thought that there would be a better design than a flat head but the thermal dynamic argument plus the maintenance requirements seem to mean it makes sense. To a degree. - If they're burning pure oxygen then they'll massively increase the engine's heat output - more oxygen = more fuel without the benefit of nitrogen to cool the escaping air. Then there's issues with pre detonation to consider.
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