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#121
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Lancair crash at SnF
On Apr 26, 11:41*am, Steve Hix
wrote: In article , *Stefan wrote: WingFlaps schrieb: In everyday's language, the word velocity stands for the _magnitude_ of the vector. Nope. Not even at high school. The magnitude is "speed". Maybe where you live. Not where I live. BS. This is stated in any basic physics text book -even Wiki knows it: "In physics...The scalar absolute value (magnitude) of velocity is speed." What part of "everyday's language" wasn't clear? I can see you have trouble with English too. If my mediocre English is offending you, then feel free to converse in German, French, Italian or Spanish with me. I know all those languages better than English, which obviously isn't my native language. How many languages do _you_ speak? There are those who might argue that he doesn't actually speak any competently. Stefan was doing quite well actually, I realized that his problem was in understanding that the magnitude of velocity is called speed. Do you? Cheers |
#122
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Lancair crash at SnF
On Apr 26, 3:16*am, B A R R Y wrote:
As we nit-pick this to death, what are the choices after a stall just a few hundred feet above the ground while turning? In a 172 in a gliding steep (=45 degree bank) turn at 65 knots? Very high I'd say and I've done it at altitude as a demonstration. But there are those who just don't believe/know it and it happens with depressing frequency. This why I argue against the "impossible turn"... Cheers |
#123
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Lancair crash at SnF
Hi,
OK, too much noise here, let's just refrain from replying to personal attacks shall we. Anyway, speed is the magnitude of the velocity vector. In a constant speed turn, speed is (obviously) constant, but the velocity is continuously changing. This is by definition. It doesn't matter how you or anyone else uses these terms. Speed is just a number, Velocity is speed plus a 'direction' variable. Since acceleration is the rate of change of velocity (dv/dt), the above mentioned aircraft in the constant speed turn is accelerating. Hilton |
#124
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Lancair crash at SnF
On Apr 26, 12:37*pm, "Hilton" wrote:
Hi, OK, too much noise here, let's just refrain from replying to personal attacks shall we. OK but sometimes you have to paint the troll for the peanut gallery. Anyway, speed is the magnitude of the velocity vector. *In a constant speed turn, speed is (obviously) constant, but the velocity is continuously changing. *This is by definition. *It doesn't matter how you or anyone else uses these terms. *Speed is just a number, Velocity is speed plus a 'direction' variable. *Since acceleration is the rate of change of velocity (dv/dt), the above mentioned aircraft in the constant speed turn is accelerating. Yes. I just hope you don't have to explain it again and again like I had to because it got really tedious. Cheers |
#125
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Lancair crash at SnF
In rec.aviation.student WingFlaps wrote:
Technical comment : Is there anyone here who thinks velocity is not used by pilots as a vector (apart from Stefan)? I say the common parlance for the magnitude of velocity is SPEED that is why you have an ASI in your plane and a speedometer in your car. Anyone disagree? I suggest that we are in a piloting forum, a technical environment, and pilots do know the difference, e.g. they understand and use basic physics and vector addition all the time... But I could be wrong and if so I apologize for using technical terms correctly. I have never heard the term "velocity" used to explicitly indicate speed and direction outside of a physics classroom. The pilots I talk to almost never use the word at all. Stefan is absolutely correct that in non-technical discussion the word is synonymous with speed. Until Stefan mentioned that he was not a native English speaker I would not have guessed. I'd also like to suggest that from my point of view your reaction to the confusion was *way* out of line. The correct response is simply to note that you are using "velocity" in its technical sense as a vector and not its lay sense as a synonym for speed, then continue the discussion from there. Berating him for bad English is simply uncalled for, although it is of course par for the course on Usenet. -- Michael Ash Rogue Amoeba Software |
#126
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Lancair crash at SnF
Senoirs manage energy cuz they dont have nuch!
KAE has brought this to us : His energy management routine was one of the best parts of an airshow. |
#127
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Lancair crash at SnF
Senoirs live in bus shelters we hate U!
B A R R Y wrote on 4/25/2008 : I'd rather hit a bus shelter or light poles @ 40-50 MPH than go in inverted after a stall/spin @ 200-300 AGL. |
#128
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Lancair crash at SnF
duh wing flaaper!
It happens that Dylan Smith formulated : I thought the engine had stopped? The prop will often keep turning after the engine has stopped |
#129
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Lancair crash at SnF
On Apr 26, 12:58*pm, Michael Ash wrote:
I'd also like to suggest that from my point of view your reaction to the confusion was *way* out of line. The correct response is simply to note that you are using "velocity" in its technical sense as a vector and not its lay sense as a synonym for speed, then continue the discussion from there. Berating him for bad English is simply uncalled for, although it is of course par for the course on Usenet. I simply started getting ****ed off when I had to state it for the third time and he continued to try to put words into my mouth. Go back over the thread and see it. Also I did not berate him, if you read the thread you would see the following exchange Stefan: What part of "everyday's language" wasn't clear? Me: I can see you have trouble with English too. Is that what you call berating him? Perhaps you did not read the thread ? Cheers |
#130
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Lancair crash at SnF
In rec.aviation.student WingFlaps wrote:
On Apr 26, 12:58?pm, Michael Ash wrote: I'd also like to suggest that from my point of view your reaction to the confusion was *way* out of line. The correct response is simply to note that you are using "velocity" in its technical sense as a vector and not its lay sense as a synonym for speed, then continue the discussion from there. Berating him for bad English is simply uncalled for, although it is of course par for the course on Usenet. I simply started getting ****ed off when I had to state it for the third time and he continued to try to put words into my mouth. Go back over the thread and see it. Also I did not berate him, if you read the thread you would see the following exchange Stefan: What part of "everyday's language" wasn't clear? Me: I can see you have trouble with English too. Is that what you call berating him? Yes. Perhaps you did not read the thread ? I read it. It is possible in this case to disagree for reasons other than ignorance. -- Michael Ash Rogue Amoeba Software |
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