#51
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Re: think about this...
I have seen this contraption work.
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#52
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Re: think about this...
In a perfect world, that contraption should stand perfectly still, no?
P.S. Damn thread hijacker - not everyone understand the plane problem yet! |
#53
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Re: think about this...
[ QUOTE ]
[ QUOTE ] [ QUOTE ] doubtful, that fan doesn't look very powerful. if it did move, it would move backwards. [/ QUOTE ] pretend it's powerful enough [/ QUOTE ] Can we pretend it runs on batterys too? [/ QUOTE ] yes, whatever |
#54
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Re: think about this...
[ QUOTE ]
[ QUOTE ] [ QUOTE ] doubtful, that fan doesn't look very powerful. if it did move, it would move backwards. [/ QUOTE ] pretend it's powerful enough [/ QUOTE ] i have zero college training, but the forces should balance, no? no movement of the skateboard (assuming the sail and fan are secured to the board) [/ QUOTE ] I can't believe you're seriously answering this. It's plugged into a friggin outlet. It's not going anywhere. Holy [censored]! |
#55
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Re: think about this...
[ QUOTE ]
[ QUOTE ] [ QUOTE ] doubtful, that fan doesn't look very powerful. if it did move, it would move backwards. [/ QUOTE ] pretend it's powerful enough [/ QUOTE ] i have zero college training, but the forces should balance, no? no movement of the skateboard (assuming the sail and fan are secured to the board) [/ QUOTE ] Don't think of the sail as an opposing force, but rather as a redirecting force. If you blow into your cupped hands, you are redirecting the wind, not canceling it. |
#56
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Re: think about this...
[ QUOTE ]
your conveyor system, in essence, removes the wheels. [/ QUOTE ] this is not right youre right the wheels purpose is to remove friction, but the axles dont care how fast or slow the wheels spin, and the plane is essentially floating. now all you need is some thrust |
#57
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Re: think about this...
[ QUOTE ]
[ QUOTE ] [ QUOTE ] [ QUOTE ] doubtful, that fan doesn't look very powerful. if it did move, it would move backwards. [/ QUOTE ] pretend it's powerful enough [/ QUOTE ] i have zero college training, but the forces should balance, no? no movement of the skateboard (assuming the sail and fan are secured to the board) [/ QUOTE ] I can't believe you're seriously answering this. It's plugged into a friggin outlet. It's not going anywhere. Holy [censored]! [/ QUOTE ] The question was "will it move?", not "how far will it move?" |
#58
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Re: think about this...
[ QUOTE ]
In a perfect world, that contraption should stand perfectly still, no? P.S. Damn thread hijacker - not everyone understand the plane problem yet! [/ QUOTE ] this entire thread is making me wish I paid more attention in the fluid mechanics course I took. I think now that your OP has been reworded, Ray, that I understand what the situation you're actually describing is |
#59
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Re: think about this...
[ QUOTE ]
[ QUOTE ] your conveyor system, in essence, removes the wheels. [/ QUOTE ] this is not right youre right the wheels purpose is to remove friction, but the axles dont care how fast or slow the wheels spin, and the plane is essentially floating. now all you need is some thrust [/ QUOTE ] Ah, I misunderstood what he meant by "removes the wheels" - this is correct. |
#60
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Re: think about this...
[ QUOTE ]
I think now that your OP has been reworded, Ray, that I understand what the situation you're actually describing is [/ QUOTE ] [img]/images/graemlins/confused.gif[/img] I didn't reword the OP at all - I only generalized that it could be basically any kind of plane, and specified there is no wind. |
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