HeavyJet From , joined Dec 1969, posts, RR: Reply 2, posted (12 years 7 months 2 weeks 5 hours ago) and read 2611 times:
Nicolaki,
It looks like you posted close to LRC speeds for the Boeings and max speeds for the Airbus fleet.
I can tell you the 747-400 is faster than .85 mach. I can also tell you the 767-300 is capable of .84 mach as I flew it around all the time at that sped.
The A300-600 max speeds are 335/.82 mach so I suspect the A319/320's max speeds are around .82 as you stated.
Cv640 From United States of America, joined Aug 2000, 948 posts, RR: 6 Reply 3, posted (12 years 7 months 2 weeks 5 hours ago) and read 2608 times:
I jump seat home and to work often with Northwest and usually ride on the 757 and A320/A319. The 757 always seems to be at .80-.82, depending on whether they're running late or not. The Airbuses are always at .78.
Occasionally I have been on Fed Exs A300 and A310, they seem to be between .78-.80 all the time.
I have never been on a 717, but the Dc-9 cruises at .75and the MD80 between .76-.78.
As for the rest I'm not sure, one thing to remember is that an airline has the last say in cruise speed. The Mmo is the limiting factor, but most airlines, especially with the newere computer controlled aircraft, set the speed that is the best for economy, so who knows, what one airline uses can be diffrent for another.
Hope this helps
AirCanadaSFO From , joined Dec 1969, posts, RR: Reply 4, posted (12 years 7 months 2 weeks 3 hours ago) and read 2594 times:
LRC for the 777 is M.84
But the 777 can go as fast as .92 in level flight, and Boeing test pilots took it to .98 in a shallow dive once. Boeing designed the 777 to cruise faster than the A340.
The 747 can go as fast as .92 in level flight as well, and I believe it cruises at .88. Correct me if I'm wrong.
At Air Canada, our A319s and 320s cruise at .78, our 330s and 340s cruise at .82.
Greeneyes53787 From United States of America, joined Aug 2000, 844 posts, RR: 0 Reply 5, posted (12 years 7 months 1 week 6 days 21 hours ago) and read 2567 times:
Cruise speed and top speed are different. Some 747s, I understand, are capable of a thirsty .91 mach level flight with a moderate load. Further, I recall that their wings are swept back more than airbusses and other Boeings. The only commercial aircraft made in the USA with an equal wing sweep, I recall, are the Convair 990 and 880 at approximately 39 degrees.
The Boeing 720 was basically designed to be able to maintain .90 mach on the level. Their sweep was 35 degrees, the aircraft were light (lighter than the 990) and the thrust capability was high proportionately.
Qantas operated a pretty hot 707 that was light but fast. Others need to tell the qualifying specs here. I have them, but I think others enjoy posting them more than I do.
EIPremier From United States of America, joined Sep 2000, 1533 posts, RR: 2 Reply 6, posted (12 years 7 months 1 week 4 days 13 hours ago) and read 2514 times:
35,000 feet:
MD-80 is .76
B737-200 is .725, while the 300-500 is .745
737NG is .785
Modesto2 From United States of America, joined Jul 2000, 2627 posts, RR: 6 Reply 8, posted (12 years 7 months 1 week 23 hours ago) and read 2466 times:
I was in a United 744 that was doing .87 at FL370.
DeltaAir From United States of America, joined May 1999, 1094 posts, RR: 0 Reply 9, posted (12 years 7 months 1 week 21 hours ago) and read 2462 times:
Between ATL-MCO, we were doing Mach .90 in a 777. We were in Orlando in around 35 minutes.
Skystar From Australia, joined Jan 2000, 1363 posts, RR: 3 Reply 10, posted (12 years 7 months 3 days 11 hours ago) and read 2448 times:
Ok, just to clear some of this up.
Airbus
A319/320/321. Max M0.82. Econ: M0.78 (up to M0.79)
A330/340. Max M0.86. Econ: M0.82 (actually, it really is M0.805 from what I have been told).
Boeing
747. Max M0.92. Econ M0.84-0.86 (depending on weight, some carriers will fly it on a standard M0.84 or an LRC schedule. Also dependent on cost index). Eg, heavy 744, init crz at FL310 at M0.86. Towards end of the flight, FL390, M0.84.
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