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You-n-Gs-town born &  bred You-n-Gs-town born & bred
2/16/2020 3:09 PM

Been watching a documentary on space, moon, vacuum conditions got me wondering about different things......

Would an ICE engine run on the moon if supplied with separate sealed air and fuel sources pressurized to the same levels that naturally occur on earth?

If so, would the vacuum have much effect at all, especially on the exhaust cycle?

Can you consider the exhaust system also sealed in this scenario if its capable of overcoming the vacuum with enough spent gases such that the vacuum only really ends up scavenging the last remnants of gases out of the tail pipe when the engine is killed that would normally be left behind on earth?

Would you hear it? Everyone probably says no because there's no air but wouldn't the spent exhaust gases provide enough of a medium to carry that sound, even faintly, to become audible if you were next to the bike?

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jeffro503 jeffro503
2/16/2020 3:15 PM

I'm not sure. But I am wondering why this is in the moto forum?

And there goes Jeffro. One of God's own prototypes. A super high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.

Pimpin' Ho's , Rollin' fatty's......drinkin' beers , beers , beers!! ~ Ja

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Millerrr973 Millerrr973
2/16/2020 3:49 PM
You-n-Gs-town born & bred wrote:

Been watching a ...more

I mean, it’s the same concept as a liquid rocket engine. You store liquid oxygen (lox) in one tank and a propellant (hydrogen, RP1, methane) in the second tank. You wouldn’t have any back pressure, the exhaust gasses would be “pulled” out by the vacuum of space. You could run the exhaust gases back into the tank to keep them pressurized. Similar to how SpaceX’s falcon 9 back purges with helium. But the exhaust gasses would generate a little bit of thrust.

I’d love to build a track on the moon or mars and send it. Maybe I’m the only one.

Oh, and you definitely wouldn’t hear it. The only reason you can hear anything on earth is because of the mechanical vibrations that are transmitted through the atmosphere. No atmosphere = no noise. The amount of exhaust gas would be negligible and would be going away from you.

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Millerrr973 Millerrr973
2/16/2020 3:50 PM

I’d just ride an Alta on the moon. No need for modification. 🌙⚡️

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plowboy plowboy
2/16/2020 4:02 PM

40 years ago I smoked my weight in really good hash. Mostly I went to concerts, screwed chicks, and listened to hard rock. Sometimes I sat down and thought about stuff. I'm pretty sure I figured out perpetual motion, world hunger, peace on earth...all the major stuff. Then I ate burritos and woke up as empty headed as a hobo stew pot. If a bear farts in the woods, if there's no one there to smell it, does it make a sound?

If it ain't yer's don't take it, If it ain't the truth dont say it, If it ain't right don't do it...Marcus Aurelius

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2/16/2020 4:15 PM

If you're traveling at the speed of light in your car would your headlights do any good?

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TeamGreen TeamGreen
2/16/2020 4:22 PM
BMSOBx2 wrote:

If you're traveling at the ...more

They'd smear

I ripped a start from Egypt and I was happy about that.

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omalley omalley
2/16/2020 7:01 PM
jeffro503 wrote:

I'm not sure. But I am ...more

Most likely because the OP created a vacuum in a glass device filled with water and smoke...

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austin_bo austin_bo
2/16/2020 7:09 PM

Two wheels, tacos, and tubes

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sumdood sumdood
2/17/2020 12:14 AM
You-n-Gs-town born & bred wrote:

Been watching a ...more

Time to switch back to shitty weed

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