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(...) Laws of aerodynamics (aero*dynamics*) are nothing but Newtonian physics. The whole governing equation of aerodynamics, the famous Navier-Stokes equation, is just a different representation of our well known F=ma. By the way, is it a miracle (...) (23 years ago, 4-Aug-00, to lugnet.space, lugnet.off-topic.geek)
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(...) Does your title of an astrophysicist amuse me? Have you worked with such people as Carl Sagan or Issac Asimov? I have not worked with these people but then again, neither have you so I think I will become skeptical of every aspect of outer (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) Jesse, I have a couple of things to write about. The first is regarding friction in space. I agree that there MUST be friction in space, otherwise anything held together with a nut or bolt would come apart. The second is in regards to your (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) Spare the attitude man, until you do, don't go wondering why people post harsh replies to your stuff. You come off as a know-it-all, even if someone who has education in a particular field counters your statement, you find a way to try to make (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) I appreciate the fact that you do agree with me but I must truthfully say that I never considered the fact that friction does indeed keep together the bolts on a space craft. Are there any other sceintific laws that either me or Paul failed to (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) Tim, in this statement, his words ARE insignificant because they are incorrect, even though he IS an astrophysicist. This is what Mister Paul Hertzog said to me, 'What the flipping space monster burgers are you talking about? Friction in (...) (23 years ago, 25-Jun-01, to lugnet.space)
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In lugnet.space, Jesse Alan Long writes: <snip> (...) I'm sure that there are TONS of other laws and theories that we aren't looking at when trying to design a "realistic" space craft. That's why I have my own Lego Universe - it allows me to be (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) By the way. Thanks for breaking out your paragraphs. It's much easier to read... -Duane (23 years ago, 25-Jun-01, to lugnet.space)
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(...) I believe Paul was poorly communicating a correct idea. The scientific law of friction is applicable everywhere, even in space. It is a law, and going to space won't make it go away. What you need to understand is how this law works. The (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) Well then, politely ask him for evidence, don't disrespect him by trying to diminish his experience in a field with smarta** remarks (eg. Does your title of an astrophysicist amuse me? Have you worked with such people as Carl Sagan or Issac (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) I've been reading the bundle of posts on the subject, so I am aware of the type of friction that he was talking about. I just wanted to make a tangental point since the "type" of friction had been dropped from the post. (...) I tend to agree (...) (23 years ago, 25-Jun-01, to lugnet.space)
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| | Should resist (Was: Couldn't resist)
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(...) Tim, (and all), I've come into this discussion late, and it occurs to me that this is the best part of it so far. It is great advice, which most everyone involved in this thread would to well to take. i.e. if you don't want to perpetuate (...) (23 years ago, 25-Jun-01, to lugnet.space)
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(...) And I would do well to consider spell-checking before I hit "send", but alas... Cheers, - jsproat (23 years ago, 25-Jun-01, to lugnet.space)
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(...) You're not seen as evil. It's just that if you're unsure of what you're saying, don't try to make out that it's absoulutely right, and people won't mind if your opinion differs from theirs. (...) Just to add to this, possibly blurring the (...) (23 years ago, 26-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Well the A-wing flight control system doesn't discriminate between air and space flight either so it's control surfaces move in space as well, producing little affect except a little momentum. I think as a Valkyrie has 2 widely spaced engines (...) (23 years ago, 26-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Yes, but the point is you'd roll by 90° to turn, not just bank a little bit. Jason J Railton (23 years ago, 26-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) The first problem I have, Jason, is that I am not sure that everyone else is right, either on these bulletin boards and I know for a fact that I am not probably right in my ways of thought in my life. Would an overheated engine become a (...) (23 years ago, 26-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Jeremy, Thanks for posting this. I think you got it exactly right. Steve (23 years ago, 26-Jun-01, to lugnet.space)
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(...) All I simply said was I got tired of the same basic designs in large space craft. I have seen these same, cigar shaped designs ever since the science fiction serials on television around six or seven decades earlier in our country. I like the (...) (23 years ago, 26-Jun-01, to lugnet.space)
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(...) That's neither here nor there. Simply build them. Some people will like them, some will dislike them. But that's not what I'm annoyed by... (...) Uh, yeah. Against my better judgement, which I'm having to temporarily shut down because it's (...) (23 years ago, 26-Jun-01, to lugnet.space)
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(...) And I thought I'd drifted off the subject... :-) I don't know of any form of reciprocating or rotating engine that could propel you through space, so engine oil seems a bit pointless. As for overheating, the only way to disperse heat in space (...) (23 years ago, 27-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I was only having some fun with the oil part of the letter, I knew that you probably did not use oil in outer space, I mean, after all, the general consensus in outer space would reflect that you would use environmentally friendly materials (...) (23 years ago, 28-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) The paragraph that I made in that letter, upon further review, did not need to be made into that letter but I guess I was simply angry at many aspect of my life and certain family members, friends, and other people. I, personally, am tired of (...) (23 years ago, 28-Jun-01, to lugnet.space)
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In lugnet.space, Jesse Alan Long writes: much clipped (...) Orbit is a balance between a spacecraft's velocity and the downward pull of gravity. The vehicle's velocity pulls it outward, like centrifugal force in a car turning a corner, and gravity (...) (23 years ago, 28-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I guess it would be based on the surface material properties. Different materials have different thermal emissivities, so picking one with a high value would be better for cooling directly to space. Of course these materials may be impossible (...) (23 years ago, 28-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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Narf! You're welcome. "Jesse Alan Long" <joyous4god2@yahoo.com> wrote in message news:GFnI8o.KF4@lugnet.com... -snip- (...) some fun, (...) (Perry (...) that is (...) even if (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Well, it's more about the angle the wing is inclined to the airflow. Just keep it tilted upward to the air flowing past you, keep your speed up, and you should get some lift. Newton says you're deflecting air downwards. Aerodynamics says a lot (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) What material would serve the best purpose for cooling off directly in space and would this material work in space to prevent the plasma that powers my space craft from overheating and making my space craft explode into a million pieces? Jesse (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I get 3.5 days, ignoring the motion of the earth toward the moon. Don't worry about the cookie - LUGNET provides free cookies for us all. :) Jeff J (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) You said in the last letter before this letter that some liquids (referring to the reaction to friction of certain particles in outer space) are viscious while some solids are very hard and smooth in reaction to friction in outer space. If (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Thank you for the demonstration about the vehicle and the turning into a curve, George. I finally grasp that concept in my mind. However, liquids, if you boil them, changes materials from liquids to gases, just to let you know, George. :.) (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Holy cow, it's that long?! Man, cool or not, forget that..., too long! Call me when the moon's an hour away. Now *that* would look cool, if it was the first time you'd looked up in a few days. Plus, the apparent gravity on the earth's surface (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I never spotted this before, but it's further proof that there's negligible friction in space. If there was, the Moon would have slowed down in it's orbit and fallen to Earth, and the Earth would slow down and fall into the sun. Actually, I (...) (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I didn't necessarily mean in space. I was just talking about liquids in general (on Earth, in an atmosphere). Clearly if you're trying to push your way through something, a gas is easier than a liquid, which is easier than a solid. But, this (...) (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I have two questions to ask now because of the replies to this bulletin board message I sent in response to many other messages on the Lugnet Space bulletin board room. The first question is for Kyle D. Jackson and Jeff Jardine and it is if we (...) (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I understand now in my mind that atoms are what makes the structure of all living organisms and the structure of all living organisms depends on the density and class of materials in the constructuion of space craft. It is obbvious to me that (...) (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I get 1 hour, 13 minutes. Or 2 hours, 26 minutes. If I could remember the derivitive of y = x^2, I'd be more precise. Steve (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) That'd be dy/dx = 2x. (I knew that calculus'd come in handy one day!) ROSCO (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Then it should be 2:26. Assuming that the relative acceleration between the Earth and the Moon is the sum of their local accelerations due to gravity. And assuming that acceleration is directly proportional to the force of gravity. Ie, when (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Calculus, yet another form of mathematics that I am unable to do in my life. Jesse Long (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Umm... It's not a poke. honest. Your value for the Earth-moon distance is off by a factor of ten. which means your answer should be 2.25ish days. And... The force of the moon's gravity doesn't really enter into this. We know Force = (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Actually, when calculating the acceleration and taking the distance into account, it's not so bad. For my first attempt at solving this, I tried converting gravitational potential energy into kinetic energy. The resulting integral was (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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I should probably try to solve the problem myself, it'll help as prep for my college entrance exam. ;-) (...) Hmm, not bad at all - that gives people time enough to *realize* it's happening, broadcast it all over the world, and let everyone go (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) As regard the math, I wouldn't know where to start, but surely even if the moon we're sitting on the earths surface the earth would still exert more force than the moon so you wouldn't be weightless. I don't know if you mean't, at the point (...) (23 years ago, 4-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Am I evil or annoying, Shiri? I am simply wanting to know and I want to know if you have built any LEGO sets of your own in your spare time. (We are evil! In-deed! Kaientai, WWF) Jesse Long (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Jesse, What does this have to do with the current thread? I also hope that you are joking (in which case you should be posting to .fun). Shiri is a good builder and a large contributor to the community. I'm a little confused as to where this (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) What's the deal with that Shiri person? She never has a bad thing to say about anyone, she's always got some positive contribution to make, and her posts are uniformly well-reasoned. I'm tired of her consistency and good-spiritedness--she's (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I am simply wondering why Shiri hates me. I was joking in part of the letter, which also means I also probably watch too much wrestling. I also have never seen any of the work that Shiri has made and simply wanted to know if Shiri (not sure (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Shiri is a woman who hangs out in the Castle sub-theme more than Space. You can check over there to see what she's made. I haven't made a castle in years.... (...) Sounds like severe weather indeed. However, you need to pay closer attention to (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I think it is safe to say that Shiri (she's of the female persuasion) does not hate you. I doubt that she hates anybody, actually. Since this seems to be the "isn't Shiri great" subsection of the thread, let me add my kudos, she does a lot of (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I read them in an electronic mail account but not necessarily the messages. I simply type on Lugnet, then they send me a copy of the letter and I post the letter, then I take the Yahoo copy of the letter and I delete that copy of the letter (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I like the LEGO Castle set but I do not have the time (today) to speak with her. Maybe I can later? Please tell Shiri I said hello, is that acceptable, Larry? Thank you, Larry. Jesse Long (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) The reason I asked was because the way that you read can influence how you reply. With the web interface, following a thread is easy. With mail it's still easy, but not quite so easy. With a newsreader, I unfortunately don't have any (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I assure you, my boy, Shiri *is* a woman. I should know. ;-) <snipped the forecast> (...) Math is confoozing. In my mind. :-) -Chris (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I think that unless we can find a specific point at which Shiri is not a man, then we cannot demonstrate conclusively that she is a woman. Either Shiri occupies a spectrum of man-ness and woman-ness with no distinction, or a distinction (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Whoa, that's something I never thought of before! It kind of raises an interesting idea, too. If this is always a trend for the satellite (i.e., "moon") of any planet with large amounts of liquid on the surface, then maybe over time there is a (...) (23 years ago, 7-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Evolution of Earth and moon (was: Couldn't resist)
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(...) Actually, you have this backwards. The friction of Earth's oceans against its solid parts is slowing the Earth's rotation down. This translates into a loss of angular momentum for the Earth. But angular momentum must be conserved. The angular (...) (23 years ago, 7-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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Hi, Long time no see, John! Have you just been lurking about? (I'm finally back from Europe myself.) Coming to Brickfest? How's JHU? (...) Weren't there other methods used recently as well? I'm not sure that any would be as accurate as a laser, (...) (23 years ago, 8-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Have you met Shiri before in your life? Jesse Long (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I would say yeah, he has, after looking at this (URL) =) ~Nathan (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I think they met once or something... (URL) (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) How sweet. ;.) Love, unfortunately, has eluded me for every moment of my life. :.( Jesse Long (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Would there be any difference in the accuracy of laser vs. radar? I'm not enough of an EE geek to know, but thought "no" because they're just different wavelengths of the same thing, right? Or does the wavelength difference (it IS many orders (...) (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) Not quite. There's a good comparison here (URL) talking about speed radar versus laser. Basically the laser is more accurate, but requires more accurate aiming by the operator. ROSCO (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) More accurate at measuring *speed*. We were talking about distance. Careful reading of both articles reveals no claimed difference in accuracy for distance measurement, since it's the same technique being used. (the speed difference is because (...) (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) I've posted a few times this year, but mostly I've been lurking. And trying to build something that truly satisfies me. I keep buying more parts and experimenting... patience now... (...) Welcome home. Is the dissertation in the can? (...) (...) (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) Isn't the theory behind rainbows (or light spectrums in general) that the different wavelengths refact by differing amounts, and so white light is "spread" into a spectrum of colours? If that's the case then radar and laser energy would (...) (23 years ago, 12-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) My first inclination is that there should not be a difference. When measuring distances with light, the accuracy *can* be limited by the wavelength. I think one can measure accurately down to roughly half the wavelength of the light used. I (...) (23 years ago, 12-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) I think most of this sounds reasonable, but I'd guess that laser still follows the inverse square "law". ROSCO (23 years ago, 12-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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In lugnet.space, Jeff Jardine writes: <snip> (...) I'll address this point to fill in a bit of a hole, as a lot of the other concerns are past me. Yes, radio waves are affected by gravity which is why they travel along the surface, so in a sense (...) (23 years ago, 13-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) I thought that the whole point of a laser is that it doesn't - it's a directed beam of parallel waves of light. The inverse square law is for a diverging beam. As distance from the source increases, the area the beam is spread over increases (...) (23 years ago, 16-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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Why is it that whenever YOU think, MY head hurts? I really wish this were clear enough to follow, because it sounds semi-interesting, but as it is, I'm just painfully confused. Take care, Soren (22 years ago, 25-Jan-03, to lugnet.space, lugnet.off-topic.geek)
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