The Sonic Boom
 

Hey Guys,

Couldn't resist sharing this one with you all.

The Sonic Boom

Enjoy,

Souls.

P.S > To all you fast jet jockeys out there - what does it feel like when you do pass Mach 1?

NASA photograph

http://apod.gsfc.nasa.gov/apod/image...plane_navy.jpg

Now THAT is impressive!

I found on a USAF fact sheet that the change in pressure caused by sonic boom is only a few pounds per square foot, about the same pressure change we experience on an elevator as it descends two or three floors, in a much shorter time period.

Anyone interested in reading that fact sheet here's the link...

http://www.af.mil/news/factsheets/Sonic_Boom.html

T.B

Going Supersonic
 

Soulman- You asked 'What does it feel like? In modern fast-jets - a total non-event, just a reading on the dial. IMHO Subsonic high speed at low level is much more impressive than Mach 2 (or even Mach 3) at altitude!. :p

Few lb/ft^2 eh? An F-104 on delivery to the RCAF many years ago did a low supersonic pass and manouvered in such a fashion to shift some new construction at RCAF station Uplands a few inches on its foundations. Damage, I think, ran in the low millions of Canadian dollars which were worth something at the time.

After an excellent landing you can use the airplane again!

Theres a photo knocking about of a Phantom I think it was doing that at about 20 ft, might be on me spare hard disc will have a look.
Wonders never cease , found it, I have no idea how to post it though, also found a clip of a F14 doing a low supersonic pass, past a Carrier, spiffing shock wave.
;)

Soulman

in answer to your question - it's great to be able to break the sound barrier in a fast jet but - you feel nothing. At most you will get a movement of the dials due to pressure waves but there is no physical sensation at all. AD drivers will confirm that we do this mostly every day and it is not a major talking point on the sqn. I quite often was at mach 1+ at 250' in the F3 which is something that the other fast-jet drivers won't have done much.

regards

B

Tony

Please post once you locate that pic, there are some dear double ugly pics out there of the old dog doing some great tricks...like a high-speed pass between some hangers and an IFR run (I Follow Roads) at about 20' that I believe was in Israel. Ah, the good old days!

Cheers! M2

The pics (various) of these sort of events are impressive. Not to sure about them showing kites going supersonic though.

My understanding of this phenomenon <sp?> is that the effect is caused by the rapid condensation of the air as it transits the various wave shock fronts that travel along the aircraft's body. The sudden pressure changes, from high to lo, cause the condensation "clouds". . . don't they?

I've seen Canberras with these condensation clouds forming and the dear old Cranberrie is certainly not a supersonic kite. :hmm:

http://www.netcomuk.co.uk/~lesb/cancond.jpg

I have found that picky of the F4 doing the low level supersonic pass but I have no idea how to post it here.
I do not have a website to host it.
:confused:
.

Hi
Major Mad Max
I have saved a copy of the picture you are looking for but I dont know how to attach it to your personal message section or to post it. If you still want it let me know how I can do it please.
All the Best
Spit:confused: :confused: :ok:

B1-B F-4

Yers ORAC thats the one I have, come to think I prolly pinched it from here anyway. :rolleyes:

Thanks!
 

Hey Guys,

Thanks for all the feedback so far on Mach 1+ flight. It has been a very interesting thread - as justified by the pictures! :p

Keep em' coming! ;)

I hope to join the RAAF after High School (2005), so maybe I too will one day experience supersonic flight.

Cheers,

Souls.

I did part of my A-level physics coursework on this phenomena. The condensation around the aircraft occurs due to the aircraft "catching up" with it's own forward emmiting sound waves. This causes a compression where all the waves are being "squeezed" together and, in moist air only, condensation occurs. This is shown by the Tomcat flying beside a carrier, only metres above the ocean - a very well known video clip.

Sonic Boom Captured on Film
 

Hey Guys,

Some people in this thread have made note of the well known video clip of an F-14 Tomcat going supersonic during a fly past on the carrier. I did a search and found a fantastic website which has almost 20 movies (in .mpg & .avi) format of military jets in action. It features 4 movies of Tomcats passing Mach 1.

Fast Jet Movies

Hope you all enjoy it as much as I did! :p Let me know what you think.

Cheers,

Souls.

SPIT, I PM'd ya with my email address. Thanks much! :ok:

What a great thread, we need more pics and vids!

Cheers to you all! M2

Some of the videos on that website purport to be of supersonic passes. Having been on the deck of a CVS when a F-14 did pass supersonic, I can tell you that the result is very different. Three seakings trashed while rotors running on deck and extensive damage to the carrier. F14 pilot sent home from Gulf:rolleyes:

And your ears?
 

Hey Tourist,

Thanks for the info regarding your experience on witnessing a sonic boom, the details sound pretty scary! Apart from the damage to the carrier and the helicopters, how were your ears? :p

Have you recovered yet?!?

Souls.

I'm going to have to wave the BS flag on this one.

First, U.S. aircraft carriers are CV or CVN, the U.S. Navy has not used the CVS designation for over 30 years. Any active Navy pilot or sailor would know this and would not call the boat a CVS. I am assuming you meant a U.S. boat since they are the only ones flying F-14s. If you meant a Brit boat, the F-14 would not get that close without permission from the Brit's air traffic control.

Second, I have witnesses many close aboard F-14 and F/A-18 supersonic low passes from the decks of the USS Theodore Roosevelt, USS John F. Kennedy and USS Carl Vinson. Never has any of the carriers or aircraft on board received any damage. I will admit we never had a helo on deck with rotors turning, but there were helos in the air just off the starboard side at desk and island height.

Third, when standing at the deck edge watching the supersonic passes, you did not feel any significant change in the wind velocity or atmospheric pressure. The only discomfort or noticable effect was sound (the sonic boom). Without proper ear protection, they hurt. With proper protection, it was still very loud.