Breaking the Sound Barrier - Page 2

lunamoth · 02-27-2007, 05:50 PM

Quote:

Originally Posted by wil

Mods...You think we oughta move the sound barrier discussion over to science or something and seperate these posts from this thread?

in the mpeg I saw the cone happen twice in a very short distance??

please explain was the barrier broke, jet slowed and broke again...surely didn't hit mach 1 and 2 in such short order...

truth or fiction indicates the condensation is from something other than the sound barrier??

A sensible request...done.

--luna

lunamoth · 02-27-2007, 06:06 PM

deleted

Quahom1 · 02-27-2007, 07:25 PM

Quote:

Originally Posted by wil

Mods...You think we oughta move the sound barrier discussion over to science or something and seperate these posts from this thread?

in the mpeg I saw the cone happen twice in a very short distance??

please explain was the barrier broke, jet slowed and broke again...surely didn't hit mach 1 and 2 in such short order...

truth or fiction indicates the condensation is from something other than the sound barrier??

Apparently at 750 knots sea level, the object approaching the sound barrier can be buffeted enough to hesistate in and out of the barrier until the engines push past. I believe that is what we just observed. I have also seen F-18s at wave top level moving so fast the water below erupted in mini geysers (just like in the movies). I also read that a pursuing fighter avoids the jet wash of the plane in front at supersonic speeds, else the engines can stall and the pursuing fighter can end up in a flat spin (unless one is flying the upgraded Mig-29/35from Russia) You should take a look at what this fighter can do! It's unbelievable!
Clip A Day - The Freshest Video Clips On The Net Served Up Daily: Amazing Russian Fighter Jet Pilot

v/r

Joshua

wil · 02-27-2007, 10:44 PM

Quote:

Originally Posted by Quahom1

Apparently at 750 knots sea level, the object approaching the sound barrier can be buffeted enough to hesistate in and out of the barrier until the engines push past. I believe that is what we just observed.

that makes sense as the 'cone' never quite developed in the first condensation but definitely held in the second.

It looks like their plan was to break the barrier right in front of the grandstands...that musta been deafening...

I've had'em roll over me in the hills of Nevada maybe 100' feet, maybe above the ground and the boom definitely followed the jet....we heard nothing stared at up at the underbellies of'em going by...and then got the wash of the wind and the boom...blew our little picnic all over the place...

seattlegal · 04-07-2007, 02:13 PM

Here's an interesting article I came acrossed on LiveScience.com
What is a Sonic Boom? Can I See One?

Quahom1 · 04-10-2007, 01:48 AM

Quote:

Originally Posted by seattlegal

Here's an interesting article I came acrossed on LiveScience.com
What is a Sonic Boom? Can I See One?

Interesting Seattlegal. However even in a wind tunnel (with perfectly dry air), infrared cameras can catch the breaking of the sound barrier as "waves" or "layers resisting the object's approach, finally being pierced and placed behind the object exceeding the speed of sound.

The water vapor at sea level is simply allowing human eyes see what infrared cameras can see.

However, again, the lower the atmospheric pressure an object is passing through, the faster the object must move in order to break the barrier...that is true enough. But Mach speeds are generally identified as being at 14.7 psi, or sea level pressure (which is 750-760 mph). regardless of altitude or atmospheric pressure of a particular object and its velocity.

I'm reminded of the "invisible man" (Kevin Bacon)...not so invisible once sprayed with water vapor.

v/r

Joshua

Quahom1 · 04-10-2007, 02:16 AM

Have to laugh. There was a time that any faster than a horse was considered "break neck" speed, yet the Cougar can move at 70 MPH. Then, it was said that anything faster than 100 mph would kill a man, yet hawks dive at over 300 mph. Then they said attempting to break the sound barrier was impossible, because man and machine would shake apart, yet chinese missles of the old dynasties were flying true to their targets, over 2000 years ago, at over 800 mph. Now we say nothing can exceed the speed of light, yet particles of quasi matter are captured doing just that.

Breaking barriers is not a matter of if, but rather a question of "when". The "how" doesn't matter, it always seems to be figured out, and adapted to...

v/r

Q

Oh, and God murmured (in chagrin), that there is NOTHING man can not accomplish, that he sets his mind to...

Nick the Pilot · 04-10-2007, 04:39 AM

Boy, Joshua, you should have been an airplane pilot.

Quahom1 · 04-10-2007, 06:07 AM

Quote:

Originally Posted by Nick the Pilot

Boy, Joshua, you should have been an airplane pilot.

I am...just not licensed...

Nick the Pilot · 04-10-2007, 06:14 AM

Oh dear....

(Nick moves slowly away from the computer screen, looking over his shoulder as he moves.)

Quahom1 · 04-10-2007, 06:24 AM

Quote:

Originally Posted by Nick the Pilot

Oh dear....

(Nick moves slowly away from the computer screen, looking over his shoulder as he moves.)

only ones to worry would be the local cows.

lunamoth · 04-10-2007, 06:26 AM

Quote:

Originally Posted by Quahom1

only ones to worry would be the local cows.

What in the world are you flying that would be a threat to cows?!

lunamoth · 04-10-2007, 06:28 AM

Quote:

Originally Posted by Quahom1

only ones to worry would be the local cows.

And am I mistaken or don't you live rather near the no-fly zone over the White House? Maryland has pretty busy air traffic doesn't it?

Quahom1 · 04-10-2007, 06:39 AM

Quote:

Originally Posted by lunamoth

And am I mistaken or don't you live rather near the no-fly zone over the White House? Maryland has pretty busy air traffic doesn't it?

Security perimeter is Five miles...and you got to let me answer the first question...

Universal Hovercraft Had to try it myself, and getting me one of these.

Plus I shag rides with brother and uncles that let me take the stick where there are ailerons to role...

Nick the Pilot · 04-10-2007, 06:54 AM

Hey, Joshua, did you know it is legal to buzz a cow but not a vehicle, structure, or human? You are off the hook! (When I used to give flight instruction, my students and I would get ... pretty ... doggone ... close ... to ... cattle as we practiced our simulated engine failures. I always reflected on how legal it was, even though it was so doggone dangerous.)

Oh, yeah, it is legal to buzz telephone polls too....