I believe it might have been the CV-990... getting close to Mach .90. I also read that the L-1011 could get close to Mach .90 too, but it would be sucking a lot of gas in the process. In terms of regular ops the 747 can still cruise at mach .86.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia
I did hear B727 to be the fastest subsonic airliner but not about it went supersonic. First passenger aircraft thet went supersonic was DC8-43 (during test flight, of course), it landed safely with no damage, and the crew felt nothing when increasing speed but there was some effect when decreasing.
A couple planes have went supersonic, for example I think there was a 747SP that slipped out of trim and went into a spiral dive from FL 350. Recovered at FL 120, wings bent upwards a couple feet perminately.
I doan't know for sure but I do have one experience. I once went on a United flight on 757-200 from LAX-ORD. We got the
re in under 1 hour 30 min. THe pilot said we were going 840 (more or less) because we had close to 200 mph tailwinds. I don't know if that is considered going close to supersonic or not. But I know that I'd hate to be going the other dirrection with that headwind.
I don't know how accurate those airshow things are, but I have been in both a Lufthansa A340 and a Finnair MD-11 that showed the speed to be 690 MPH. I believe thats quite not supersonic at 30000 feet, but it sure is close.
Bar none it's the CV-990.
What you see on those screens are groundspeed.
If I had a 800 MPH tailwind I wouldn't be going supersonic in my 172 because the wind is pushing me and my sound and everything.
Mach is based on True Airspeed. So you can't use groundspeed.
After the CV-990 it's a tossup between the 747 and the L1011. I once went to the cockpit of a KLM 743 and saw 0.88 on the Mach with no glitch.
After that it's anyone's guess.......
The 777 can go as fast as .92 in level flight. Boeing test pilots took it up to .98 in a shallow dive during the testing period back in 1995. Long range cruise for the 777 is M0.84. I understand that on short hops between ATL and MCO, Delta pilots routinely take their 777s as high as .90. I hear the same about DEN-ORD and SFO-DEN 777 runs on United.
IndianGuy, Tu154 (M or whatever else) was never "near supersonic". I flew on it 60 or so times and it was never faster than 960 km/h. I said it in the previous topic too, and if you are not agree, please, provide your source of information.
Tu144 was to be faster than Concorde by design (M2.24 vs M2.02) but I've never heard it achieved this speed in a real flight. Did anybody hear?
??? Erik, I'll be really thankful to you (no sarcasm) if you tell me what your source is (and so prove me you are right) but, OK, what is the source? Who are these mysterious "they"? My sources are: (1) my own experience (see post above) and (2) PLENTY of Soviet literature with no statement that Tu154 is the fastest subsonic airliner. Believe me, if it was one, they'd not forget to mention it!
commercial airliners fly mostly in the range of 575mph-600mph. they simply are not designed to go any faster. indeed they can, but the plane would experience severe and life threatening consequences.
the concord was an original and one of a kind.
In August, 1996 I flown from Memphis to Amsterdam and I remember that the speed shown on the onboard monitor was 1019 km/h. I don't remember it in miles/h (I'm European) but I think it was a very high speed.
...and I'm pretty sure it was a ground speed, not a true airspeed. I had the same on May flying on UA777 from IAD to LHR. The reason is that both were transatlantic EASTBOUND flights with prevailing tailwinds. An excellent example is the first jet transatlantic passenger flight: both were BOAC Comet 4, and one that flew westbound was to make a refuel stop in Gander, while another one (G-APDB) made it non-stop flying eastbound.
The only subsonic airliner to reach supersonic speeds was a DC-8-40 (RR Conway-powered overwater variant) on a test flight before delivery to Canadian Pacific Airlines in 1961. The plane went supersonic briefly during a shallow dive, speaking volumes of the structural integrity of the 'eignt. This was a one-time occurrence, but to my knowledge the record still stands.
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery