QUOTE (turbonium @ Nov 10 2007, 12:11 PM)

Come on, postie - the flag does move in many other clips. I'm quite sure you know that. But those flag movements usually occur while an astronaut is holding the flag, or twisting the flag pole, etc. - so the pro-Apollo camp always claims that the flag movement is due to the astronaut moving it.
Of course the flag moves in other clips in the situations you've described! I thought it was clear from context that we are talking about an astronaut moving past a stationary flag and causing it to move. I've not seen that anywhere else. I'm sure if any other CTs had, I would have heard about it. (That's not to say such a clip doesn't exist of course, just that I've neither seen it not heard of it).
QUOTE
But in this case, the flag waves, but it is never touched.
What caused it to move is open to debate - I mention several possibilities in my previous post. I think the best way forward is to decide whether the clip could have been filmed in an atmosphere. If it can be shown that the motion of the nylon flag is impossible (or exceedingly unlikely) in an atmosphere, then we can pretty much deduce it was in a vacuum. Whether you choose to believe that vacuum was on the moon or in one of NASAs vacuum chambers depends on your point of view of course...

QUOTE
Also, note that the astronaut in this clip is jumping/running along at a fairly fast pace. Certainly, it's faster, and "bouncier", than how the astronauts move around most of the time! Even from several feet away, his quick, energetic "bunny hop" is easily capable of creating enough wind to make a thin nylon flag flutter a little bit at one loose corner!
Yes, it's possible to
start a flag fluttering in this manner, I'm not disputing that! It's the subsequent motion of the flag that's the giveaway to the flag being in a vacuum. It does not "flutter" - the small motions are pendulum-like in nature. They are very even. They continue slowing down for about 20 seconds before the flag becomes stationary. Damping of a 3'x5' nylon flag is MUCH more pronounced in an atmosphere. The scenario you seem to be suggetsing requires a puff of wind that keeps on blowing very gently against the flag for several seconds after the astronaut has passed by, each time causing the corner of the flag to move ever so slightly, without creating the ripples and random motion that you would expect wind to do. Remember, this wind is some kind of eddy current, swirling around in the wake of the astronaut, which just happens to be strong enough to cause a small initial displacement, and yet has the peculiar quality of causing the corner flag to continue to move almost pendulum-like, with no effect on the part of the flag closer to the flagpole? If you can recreate this here on Earth I will be impressed! I've come nowhere near despite giving it a good go, but I know that inability to do something isn't proof it can't be done, so please do try it yourself. Perhaps you can Youtube the results? If I get chance over the weekend I'll do the same.
QUOTE
Hey, I'm fine with that - we're all entitled to our opinions. I have my own opinions on such matters, too, but I have no desire to start mudslinging.
Turbs, I'm sorry if it came over that way. No offence intended, so I'll withdraw the "pseudo-science" label.
QUOTE
Are you really suggesting that a flag can't wave like this from wind blowing against it?!? That it's actually impossible?
I think I clarified this bit above - a small gust of wind can start the initial movement, but in an atmosphere, I think the odds of seeing the motion that we see (for a 3'x5' nylon flag, which is what i've tried this with), are... well, let's say "vanishingly small" rather than impossible
QUOTE
It waves slightly to begin with, and then it gradually settles down, until it's completely still again - all within about 20 seconds or so. If there was no atmosphere, it would keep waving as much as the first couple of times, for at least a longer period of time - not in continually smaller and smaller waves - like we see in the video.
There is some damping that is not atmospheric - internal friction caused by the nature of the material itself. How long do you propose the flag should continue moving for in a vacuum? Do you have any experimental evidence to back this up? 20 seconds doesn't seem unreasonable to me, though I must admit I don't have a vacuum chamber handy to test this.
QUOTE
Btw, just what do you think could have created this supposedly "very even and pendumum-like" effect? An effect that is somehow impossible for any type of a wind to have created?
I hope I've explained myself clearly on this one. What caused the initial displacement of the flag is irrelevant (to the hoax) IF it can be shown that the subsequent motion could not occur in an atmosphere.
The "very even, pendulum-like effect" is caused by the Laws of physics - once the flag started moving (by whatever cause), it was always going to move in the other direction again due to gravity. The even, pendulum-like nature of the motion is a good pointer to there not being an atmosphere, which would otherwise very heavily damp the motion (lightweight flag + large surface area + atmosphere = heavily damped!)
QUOTE
I've got some news for you, postie - a gust of wind isn't always meant to describe a "turbulent wake. In this case, it just means any air current which can be created by body movements. Like the air currents that quick "bunny hops" can create, as we see the astronaut do in the video.
I think you'll find it would still be turbulent! I thinks most gusts do have a certain amount of turbulence to them. Especially the chaotic motion caused by great lump in a spacesuit bunny-hopping along.
QUOTE
No. The flag behaves exactly like it should in an atmosphere - the waves get progressively smaller and smaller, until it stops moving. As I said, I don't have a flag as yet, but I will make sure to get one soon, just to prove to you that creating this effect with wind is easily repeatable.
Great! Look forward to it.
QUOTE
It's impossible for wind to make a flag wave like that? That's a real doozy of a claim you've got there, postie!
Maybe they sent me a flag that refuses to wave properly. Curse you, eBay!!!