Search the archive:
YaBB - Yet another Bulletin Board
 
   
 
Pages: 1 ... 3 4 5 
Send Topic Print
This will get ugly (Read 1480 times)
Reply #60 - Dec 17th, 2004 at 8:01pm

TacitBlue   Offline
Colonel
That's right, I have my
own logo.
Saint Joseph, Missouri, USA

Gender: male
Posts: 5391
*****
 
this may sound kinda' dumb, but I know your hearing isnt effected when traveling that fast. But I could never understand why. It seems to me that if you are going faster than sound, then you should pass whatever sounds are around you and not be able to hear them.
Again, I know it isnt true, but I dont understand it.
 

...
A&P Mechanic, Rankin Aircraft 78Y

Aircraft are naturally beautiful because form follows function. -TB
IP Logged
 
Reply #61 - Dec 17th, 2004 at 9:45pm

forfun   Offline
Colonel

Gender: male
Posts: 216
*****
 
Quote:
This was many years ago but I can remember it as if it were yesterday. We started the dive at 43,000 feet & pulled out at 20,000. Then we climbed back up & did it again. Magic. Wink

I had a better illustration of the sonic boom but I've lost it. If I find it I'll post it here.

PS. I found it. Play the applet at the bottom of this page. http://www.phy.ntnu.edu.tw/java/airplane/airplane.html

Cool
 

Now if something goes without saying, then why do people say it??&&&&http://www.homepages.mcb.net/bones/04fs/MP/9320.jpg
IP Logged
 
Reply #62 - Dec 18th, 2004 at 4:20am

Hagar   Offline
Colonel
My Spitfire Girl
Costa Geriatrica

Posts: 33159
*****
 
Quote:
this may sound kinda' dumb, but I know your hearing isnt effected when traveling that fast. But I could never understand why. It seems to me that if you are going faster than sound, then you should pass whatever sounds are around you and not be able to hear them.
Again, I know it isnt true, but I dont understand it.

If the aircraft is travelling faster than sound so is everything inside it, including the occupants & the air in the cabin or cockpit. This is relative to the world outside & in straight & level flight at a constant speed you would have no sensation of motion at all. Your environment is not affected by speed but acceleration. In just the same way you could get out of your seat & walk around the cabin of Concorde travelling at Mach 2. It's highly unlikely you would hear anything outside the aircraft even at subsonic speeds.

PS. In the original TV ads for Concorde they showed a glass of water (maybe it was something stronger) & a coin standing on edge on one of the passenger tables. This was filmed in flight with the machmeter in the cabin in shot. There was no sign of a ripple on the liquid in the glass & the coin remained stationary & upright even when the magic figure was reached on the machmeter. At the normal operating altitude of Concorde there would far less chance of turbulence than on an ordinary subsonic passenger jet.

I found this photo which is the way I prefer to remember this wonderful aircraft.
...
« Last Edit: Dec 18th, 2004 at 6:20am by Hagar »  

...

Founder & Sole Member - Grumpy's Over the Hill Club for Veteran Virtual Aviators
Member of the Fox Four Group

Need help? Try Grumpy's Lair

My photo gallery
IP Logged
 
Reply #63 - Dec 19th, 2004 at 6:13pm

TacitBlue   Offline
Colonel
That's right, I have my
own logo.
Saint Joseph, Missouri, USA

Gender: male
Posts: 5391
*****
 
Thanks for the explaination. I understand now.  Grin
 

...
A&P Mechanic, Rankin Aircraft 78Y

Aircraft are naturally beautiful because form follows function. -TB
IP Logged
 
Reply #64 - Dec 20th, 2004 at 10:10am

Woodlouse2002   Offline
Colonel
I like jam.
Cornwall, England

Gender: male
Posts: 12574
*****
 
I saw a great way of explaining how you hear Concorde when its supersonic the other day. Basically imagine a cone, with the point being at Concordes nose with the cone going off behind, getting wider and wider. Outside of this cone you'll hear nothing, inside the cone you'll hear the aircraft/sonic boom.
 

Woodlouse2002 PITA and BAR!!!!!!!!&&&&Our Sovereign Lord the King chargeth and commandeth all persons, being assembled, immediately to disperse themselves, and peaceably to depart to their habitations, or to their lawful business, upon the pains contained in the Act made in the first year of King George the First for preventing tumults and riotous assemblies. God Save the King.&&&&Viva la revolution!
IP Logged
 
Reply #65 - Dec 20th, 2004 at 10:47am

Hagar   Offline
Colonel
My Spitfire Girl
Costa Geriatrica

Posts: 33159
*****
 
Quote:
I saw a great way of explaining how you hear Concorde when its supersonic the other day. Basically imagine a cone, with the point being at Concordes nose with the cone going off behind, getting wider and wider. Outside of this cone you'll hear nothing, inside the cone you'll hear the aircraft/sonic boom.

Except inside the aircraft itself. I'm not sure how accurate that cone analogy would be anyway. The sound waves spread out like the wake of a boat. In all the photos & illustrations I've seen the main area of disturbance originates further back towards the tail. In most cases a listener on the gound would hear a distinct double boom.
 

...

Founder & Sole Member - Grumpy's Over the Hill Club for Veteran Virtual Aviators
Member of the Fox Four Group

Need help? Try Grumpy's Lair

My photo gallery
IP Logged
 
Reply #66 - Dec 20th, 2004 at 12:26pm

Woodlouse2002   Offline
Colonel
I like jam.
Cornwall, England

Gender: male
Posts: 12574
*****
 
You have to remember that with the wake of a boat you have two sets of waves, one coming off the bow, where the water is being parted, and one off the stern. The same will apply to Concorde. With the wake of a boat almost all the disturbance in the water is directly behind and within the waves given off by the stern of the vessel. With Concorde going through the sound barrier the nose is the part actually breaking the barrier, and so parting the air, you'll have another wave further down the aircraft and after that you'll have the sound disturbance.
 

Woodlouse2002 PITA and BAR!!!!!!!!&&&&Our Sovereign Lord the King chargeth and commandeth all persons, being assembled, immediately to disperse themselves, and peaceably to depart to their habitations, or to their lawful business, upon the pains contained in the Act made in the first year of King George the First for preventing tumults and riotous assemblies. God Save the King.&&&&Viva la revolution!
IP Logged
 
Reply #67 - Dec 24th, 2004 at 1:28pm

krylite   Offline
Colonel
ftg VA LH584

Posts: 89
*****
 
There seems to be the need to blame someone otherwise it could be said "Damien" did it and caused the strip to fall off in the path of the Concorde's tire i.e. a totally unpredictable accident or an act of God.

Though I have a question. Is anything or anyone responsible for checking the runway clear of obstructions before the next plane takes off, or was that titanium piece just too small to be obvious?
 

...&&Waiting for the Queen, PMDG!&&ega-GeForce FX5200 128mb DDR AGP8x
IP Logged
 
Reply #68 - Dec 24th, 2004 at 1:40pm

Craig.   Offline
Colonel
Birmingham

Gender: male
Posts: 18590
*****
 
kry, they have runway inspections throughout the day, a car will drive down the runway checking, but they only do a couple
 
IP Logged
 
Pages: 1 ... 3 4 5 
Send Topic Print