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Airliners Breaking The Sound Barrier  
User currently offlineVimanav From India, joined Jul 2003, 1515 posts, RR: 14
Posted (10 years 11 months 14 hours ago) and read 9127 times:

I once read of a B727-100 during the course of an uncontrolled descent (more of a nose dive) actually broke the sound barrier. Are there other such instances of commercial airliners (apart from Concorde and Concordeski) managing such a feat.

rgds//Vimanav


Sarfaroshi kii tamannaa ab hamaare dil mein hai, Dekhnaa hai zor kitnaa baazu-e-qaatil mein hai
18 replies: All unread, jump to last
 
User currently offlinePl4nekr4zy From United States of America, joined Aug 2003, 465 posts, RR: 3
Reply 1, posted (10 years 11 months 14 hours ago) and read 9102 times:

I once read that a 747 (-200, I think) almost reached the speed of sound in a nose dive during a test flight.


"Don't forget to bring a towel!"
User currently onlinePW100 From Netherlands, joined Jan 2002, 2350 posts, RR: 11
Reply 2, posted (10 years 11 months 14 hours ago) and read 9105 times:

A specially modified DC-8 broke the sound barrier in a shallow dive before Concorde or TU-144 did so. I believe it actually was the first commercial transport to do so.

PW100



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User currently offlineSuspen From United States of America, joined Aug 2003, 156 posts, RR: 1
Reply 3, posted (10 years 11 months 10 hours ago) and read 8954 times:


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I thought there was also a DC-10 that broke the sound barrier in a controlled experiment with lots of ballast onboard?



Tower: "Cessna xxxx, state your intentions", Cessna: "To become airline pilot"
User currently offlineAA61hvy From United States of America, joined Nov 1999, 13977 posts, RR: 57
Reply 4, posted (10 years 11 months 10 hours ago) and read 8959 times:

You showed a SP not a DC10


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User currently offlineN766UA From United States of America, joined Jul 1999, 8182 posts, RR: 24
Reply 5, posted (10 years 11 months 10 hours ago) and read 8912 times:

Well maybe if AA61hvy would bother to read the caption he'd notice that the 747SP pictured actually broke the sound barrier....


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User currently offlineNorthStarDC4M From Canada, joined Apr 2000, 2987 posts, RR: 37
Reply 6, posted (10 years 11 months 7 hours ago) and read 8843 times:
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actually it was an UNmodified Dc-8-43 that went past mach 1 in a controlled dive during flight testing. The aircraft was later delivered to Canadian Pacific as CF-CPG... so there, Canada had the worlds 1st supersonic airliner hehe.

The Cessna Citation X CAN go past mach 1, its certified to Mach 0.97 so it must have the capacity to exceed that by .06 mach, aka 1.03, to meet FAA certification standards.

A China Airlines 747SP may of gone past mach 1 in that uncontrolled dive, bu the aircraft was HEAVILY damaged, i say MAY because there were no external reliable information sources and the aircrafts own flight data recorder wasnt properly functioning at the time.



Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.
User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 7, posted (10 years 11 months 6 hours ago) and read 8781 times:

As someone already mentioned a DC-8 was the first airliner to exceed Mach 1. A Rolls-Royce-powered DC8 achieved fame in August 1961 by becoming the first commercial jetliner to exceed the speed of sound. The milestone was passed while a team was verifying the performance of a leading edge improvement in an aircraft destined for Canadian Pacific. Over Edwards Air Force base the DC-8 dived from 52,000 feet. It achieved a top speed of 660.6 MPH(Mach 1.012) at 41,088 feet.

User currently offline767ALLTHEWAY From United States of America, joined Nov 1999, 659 posts, RR: 0
Reply 8, posted (10 years 11 months 6 hours ago) and read 8737 times:

Hey what about the Convair 880/990? I know those were awfully fast jets, did they ever break it or ever come close?


"Courage is not the absence of fear, but rather the judgement that something else is more important than fear"
User currently offlineMxCtrlr From United States of America, joined Nov 2001, 2485 posts, RR: 35
Reply 9, posted (10 years 11 months 6 hours ago) and read 8720 times:

AFAIK, the B-707 (PA), B-727-200 (TW), DC-8 (as mentioned above) and B-747 (China Air) have all broken the sound barrier successfully. Of course, after they did this feat, they all spent extensive time in the hangar getting fixed but they at least held it together! I walsy said Boeing and Douglas build tanks and this proves it!

MxCtrlr  Smile/happy/getting dizzy
Freight Dogs Anonymous - O.O.T.S.K.  Smokin cool



DAMN! This SUCKS! I just had to go to the next higher age bracket in my profile! :-(
User currently offlineSuspen From United States of America, joined Aug 2003, 156 posts, RR: 1
Reply 10, posted (10 years 11 months 5 hours ago) and read 8687 times:

Sorry for the confusion, AA61hvy, I was in a hurry when I posted that. The SP is the "supersonic 747" and I said there was "also" a DC-10, but judging from the other comments in this thread, my memory was incorrect and it was actually a DC-8.  Smile


Tower: "Cessna xxxx, state your intentions", Cessna: "To become airline pilot"
User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 11, posted (10 years 10 months 4 weeks 1 day 20 hours ago) and read 8559 times:

That China Airlines 747SP was really bent after it went supersonic. I remember reading it was missing a whole lot of rivets, the wings and engine pylons were all bent and it was barely still intact when it landed.

User currently offlineFLYSSC From United States of America, joined Aug 2003, 7401 posts, RR: 57
Reply 12, posted (10 years 10 months 4 weeks 1 day 18 hours ago) and read 8489 times:

Hey...Come on !!!! Stop trying to find a Supersonic Boeing or Douglas or whatever...!  Wink/being sarcastic

There is ONE and olny ONE supersonic jetliner. We all know that. And there will probably never be another one.

The most beautiful flying creature ever made.

Her Majesty Concorde...!


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User currently offlineL-188 From United States of America, joined Jul 1999, 29784 posts, RR: 58
Reply 13, posted (10 years 10 months 4 weeks 1 day 18 hours ago) and read 8455 times:

FLYSSC....

You are going to get some zingers from the russians over that crack


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Didn't it also fly before it's western Copy also Big grin



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineFLYSSC From United States of America, joined Aug 2003, 7401 posts, RR: 57
Reply 14, posted (10 years 10 months 4 weeks 1 day 17 hours ago) and read 8410 times:

she maybe flew before...but not for a long time...and had a short career and sad destiny, as SHE was only a (bad) copy of the Concorde...!  Acting devilish

User currently offlineCitationJet From United States of America, joined Mar 2003, 2413 posts, RR: 3
Reply 15, posted (10 years 10 months 4 weeks 1 day 17 hours ago) and read 8397 times:

NorthStarDC4M,
The Citation X has a Mmo = 0.92. The required pad for FAA requirements is 0.07. We had to fly to Md = 0.99 during envelope expansion and flutter testing. We used a T-38 as a chase plane (the one that was in the Pepsi commercials, N38CT owned by Chuck Thornton).
During the dive testing, we did exceed Mach 1.0, but were not required to by FAA regulation. As a result, we renamed a conference/meeting room at Cessna the "Mach 1". In it we have pictures of military/commercial supersonic aircraft. The Citation X is also pictured there.



Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.
User currently offlineJacques60 From France, joined Jul 2003, 120 posts, RR: 0
Reply 16, posted (10 years 10 months 4 weeks 1 day 16 hours ago) and read 8338 times:

Coincidence ?
In july 1969 I flew a DC8 (sorry don't remember the type) on CP AMS/YUL
and (at that time it was easy) had a chat with crew in flight and they were positive that this very aircraft had broken sound barrier !
Too bad I did not notice the registration !!


User currently offlineFLYSSC From United States of America, joined Aug 2003, 7401 posts, RR: 57
Reply 17, posted (10 years 10 months 4 weeks 1 day 14 hours ago) and read 8285 times:

----------------------------  Yeah sure...

User currently offlineConcordeBoy From , joined Dec 1969, posts, RR:
Reply 18, posted (10 years 10 months 4 weeks 1 day 13 hours ago) and read 8253 times:

Sadly, SU-GAP also broke the sound barrier during its final death dive as well  Sad

It's seen here with another deceased supersonic aircraft... what a sad picture.  Sad

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