nathaniel 0 #1 December 18, 2003 clicky mach 1.3! nathanielMy advice is to do what your parents did; get a job, sir. The bums will always lose. Do you hear me, Lebowski? Quote Share this post Link to post Share on other sites
NZL60 0 #2 December 18, 2003 damn ! Interesting article.. wonder if she will create a sonic boom .. that outta fire the juices of all them free fly nuts out there Who said Kiwis can't fly? Quote Share this post Link to post Share on other sites
pilotdave 0 #3 December 18, 2003 Anything going supersonic will create a sonic boom... but you won't be able to hear it unless she passes you in freefall. The shockwaves won't reach the ground. Dave Quote Share this post Link to post Share on other sites
NZL60 0 #4 December 18, 2003 fascinating.. why wouldn't it reach the ground? size ? Who said Kiwis can't fly? Quote Share this post Link to post Share on other sites
koz2000 1 #5 December 18, 2003 Then why won't the FAA allow a plane to go over Mach above the land? According to them it's the sonic boom... Some interesting readings: http://www.nap.edu/html/commercial_supersonic/ch2.html http://www.bizjournals.com/wichita/stories/2003/11/17/story5.html Officials from Cessna Aircraft Co., whose Citation X flies at a maximum speed of Mach 0.92, making it the fastest business jet currently produced, says the market for supersonic business jets is limited because of sonic booms and rules that prevent supersonic travel over some continents, including the United States.______________________________________________ - Does this small canopy make my balls look big? - J. Hayes - Quote Share this post Link to post Share on other sites
Tripitaka 0 #6 December 18, 2003 i wonder is she will do some funky freeflying :) Quote Share this post Link to post Share on other sites
AndyMan 7 #7 December 18, 2003 I doubt very much she will create a sonic boom. Nor will she "brake the sound barrier". Remember your physics. She goes faster because as altitude increases, air preasure decreases. This much is obvious. What everyone ALWAYS forgets is that as air-preasure decreases, the speed of sound increases! So... the thinner the air, the faster she'll fall. but also, the thinner the air, the faster the sound barrier actually is! So while she's going to go faster then the speed of sound at ground level, it does not actually break the sound barrier, because where she's at the sound barrier is a lot higher. _Am__ You put the fun in "funnel" - craichead. Quote Share this post Link to post Share on other sites
pilotdave 0 #8 December 18, 2003 According to the article, she'll be doing 1150 km/hr, which equals about 1048 feet per second. The speed of sound at sea level, in standard atmospheric conditions, is 1116.4 ft/s. I don't know what altitude she'll reach terminal velocity, but it says she'll start to slow down at 100,000, so lets assume that's where she hits terminal. The speed of sound at that altitude (in a standard atmosphere) is 1003.2 ft/s. She'll be supersonic. Anything moving supersonic, or in fact transonic (where the speed is subsonic but some of the flow around the object is supersonic), will create shockwaves. A sonic boom is nothing more than what you hear when a shockwave enters your ear. Nobody will hear her shockwave because a shockwave forms in a cone shape. Falling straight toward the ground, the cone will face the ground, pointy side down. You'd have to be next to her for the shockwave to pass over you. A plane creates a sonic boom because it's flying horizontally. The shockwave passes over the ground. edit: The speed of sound does NOT depend on air pressure. It depends on some properties of air (which change with the composition and density of the air, which changes with altitude) and temperature. As temperature decreases, speed of sound also decreases. For the most part, up to 100,000 feet, the speed of sound decreases with altitude. Dave Quote Share this post Link to post Share on other sites
billvon 3,070 #9 December 19, 2003 >What everyone ALWAYS forgets is that as air-preasure decreases, >the speed of sound increases! No it doesn't. From the NASA website: The speed of sound depends on the state of the gas; more specifically, the square root of the temperature of the gas. The speed of sound (a) is equal to the square root of the ratio of specific heats (g) times the gas constant (R) times the absolute temperature (T). Quote Share this post Link to post Share on other sites
voodew1 0 #10 December 19, 2003 you people need to get out more, your brains are filled with useless info---mine on the other hand is filled with barley, hopps and bong resin!!!!! Just kidding but man where do you learn all this shit??? The pimp hand is powdered up ... say something stupid Quote Share this post Link to post Share on other sites
koz2000 1 #11 December 19, 2003 Didn't Col Joe K. break the sound barrier with his drouge-fall jump? For some reason, I thought he did....______________________________________________ - Does this small canopy make my balls look big? - J. Hayes - Quote Share this post Link to post Share on other sites
Tonto 1 #12 December 19, 2003 Quote mach 1.3! You cannot build a reputation on what you are going to do. - Henry Ford. tIt's the year of the Pig. Quote Share this post Link to post Share on other sites
pilotdave 0 #13 December 19, 2003 At the time it was believed he did. Modern aerodynamics experts don't believe it's possible though. And to answer the question about how (at least I) know about this sorta thing, I took classes on it and now have a degree in aerospace engineering. By the way, high speed aerodynamics is WAY easier than low speed aerodynamics, at least until you reach hypersonic aerodynamics. Once a shockwave forms, things become pretty simple. Dave Quote Share this post Link to post Share on other sites
LoudDan 0 #14 December 19, 2003 I was told there would be no math involved.... Coming soon to a bowl of Wheaties near you!! Quote Share this post Link to post Share on other sites
TomSpoon 4 #15 December 20, 2003 My hat is off to Cheryl. If she had balls. I'm sure they would be big brass ones. Quote Share this post Link to post Share on other sites
