The new "airplane on a treadmill" paradox

yabba said:
ahh, so maybe this is a lighter-than-air helicopter, and its main rotor is actually used to push it down to keep it hovering.

I think we should also consider that we're making an assumption that the train car is filled with air. It MIGHT be a train car that's been totally evacuated and have no air in it. AND maybe it's in space. (maybe the helicopter rotor isn't spinning (another unsafe assumption on my part!), but it doesn't need to because there's no gravity)
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If the train car was indeed a vacuum, then the rotor would accomplish nothing besides spinning and the copter would rest on the floor for the duration of the experiment. But the real question would be, where did the air go?
 
shoeless said:
If the train car was indeed a vacuum, then the rotor would accomplish nothing besides spinning and the copter would rest on the floor for the duration of the experiment.
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ahh, but you're assuming the train car isn't in space!
 
yabba said:
ahh, so maybe this is a lighter-than-air helicopter, and its main rotor is actually used to push it down to keep it hovering.

I think we should also consider that we're making an assumption that the train car is filled with air. It MIGHT be a train car that's been totally evacuated and have no air in it. AND maybe it's in space. (maybe the helicopter rotor isn't spinning (another unsafe assumption on my part!), but it doesn't need to because there's no gravity)
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That's my point though. I'm not allowing for assumptions. If it's not given as part of the problem statement, I'm not considering it as part of the logic analysis.

I do agree thought that your assumption is a good one, and one that I made. I'm just not allowing it into the equation.
Because that's how you get exam questions wrong ( whether your answer is right or not ).
 
I'm about to be vivisected by Elon Musk in his 20 minutes of daily downtime in a space cube orbiting Venus. How do I escape?
 
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dodgechargerfan said:
That's my point though. I'm not allowing for assumptions. If it's not given as part of the problem statement, I'm not considering it as part of the logic analysis.

I do agree thought that your assumption is a good one, and one that I made. I'm just not allowing it into the equation.
Because that's how you get exam questions wrong ( whether your answer is right or not ).
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I wasn't aware we were being graded on this
 
Theodore said:
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That's pretty impressive, especially considering two of those fans are oscillating so the timing has to be just right on the rest of the path to keep that plane going. Of course, that's a looped GIF, so it might have only made it around once, nullifying the impressiveness.
 
It's going to crash and break a tiny part you didn't think you would need a spare of. Of course this $2.00 part is vital to it's operation so you pack your shit up and go home. You leave mad and the kids leave disappointed. Soon after your kids drop their plans to become engineers and decide to major in supply chain management. The helicopter never leaves the shoe box again. The end.
 
The two ugly as fuck cretins from that myth buster show and their perky, young, pseudo hip cohosts in 3...2...1...
 
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