Vimanav From India, joined Jul 2003, 1498 posts, RR: 19 Posted (10 years 4 months 6 days 4 hours ago) and read 7849 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.
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NorthStarDC4M From Canada, joined Apr 2000, 2907 posts, RR: 39 Reply 6, posted (10 years 4 months 5 days 22 hours ago) and read 7565 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.
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Positive rate From Australia, joined Sep 2001, 2143 posts, RR: 1 Reply 7, posted (10 years 4 months 5 days 20 hours ago) and read 7503 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.
MxCtrlr From United States of America, joined Nov 2001, 2485 posts, RR: 37 Reply 9, posted (10 years 4 months 5 days 20 hours ago) and read 7442 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!
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Suspen From United States of America, joined Aug 2003, 156 posts, RR: 1 Reply 10, posted (10 years 4 months 5 days 19 hours ago) and read 7409 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.
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Positive rate From Australia, joined Sep 2001, 2143 posts, RR: 1 Reply 11, posted (10 years 4 months 5 days 11 hours ago) and read 7281 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.
CitationJet From United States of America, joined Mar 2003, 2319 posts, RR: 3 Reply 15, posted (10 years 4 months 5 days 7 hours ago) and read 7119 times:
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.
Jacques60 From France, joined Jul 2003, 120 posts, RR: 0 Reply 16, posted (10 years 4 months 5 days 6 hours ago) and read 7060 times:
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 !!