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Mach Speeds For Airbus @ Boeing  
User currently offlineMikey From United States of America, joined Jul 1999, 195 posts, RR: 1
Posted (15 years 7 months 3 weeks 6 days 20 hours ago) and read 5910 times:

does someone know what are the mach number and crusing altitude for the following aircraft A319 to A340, Boeing 717 to 777 and finally MD80's to MD11.


Ex LAX, LGB, SNA aviation photographer
10 replies: All unread, jump to last
User currently offlineNicolaki From , joined Dec 1969, posts, RR:
Reply 1, posted (15 years 7 months 3 weeks 6 days 17 hours ago) and read 5812 times:

717: M0.77 (At 34,200ft)
737(-700): M0.78 (At 35,000ft)
747(-400): M0.85 (At 35,000ft)
757: 0.80
767(-300): M0.80 (At 35,000ft)
777(-200): M0.84 (At 35,000ft)

A319: M0.82
A320: M0.82
A321: M0.82
A330(-200): M0.86
A340(-200): M0.86

Nicolas Bourbillon
Montreal, Canada

User currently offlineHeavyJet From , joined Dec 1969, posts, RR:
Reply 2, posted (15 years 7 months 3 weeks 6 days 14 hours ago) and read 5791 times:


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.

User currently offlineCv640 From United States of America, joined Aug 2000, 952 posts, RR: 5
Reply 3, posted (15 years 7 months 3 weeks 6 days 13 hours ago) and read 5788 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

User currently offlineAirCanadaSFO From , joined Dec 1969, posts, RR:
Reply 4, posted (15 years 7 months 3 weeks 6 days 11 hours ago) and read 5774 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.


User currently offlineGreeneyes53787 From United States of America, joined Aug 2000, 844 posts, RR: 0
Reply 5, posted (15 years 7 months 3 weeks 6 days 5 hours ago) and read 5747 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.


User currently offlineEIPremier From United States of America, joined Sep 2000, 1550 posts, RR: 1
Reply 6, posted (15 years 7 months 3 weeks 3 days 21 hours ago) and read 5694 times:

35,000 feet:

MD-80 is .76

B737-200 is .725, while the 300-500 is .745
737NG is .785

User currently offlineB737-700 From , joined Dec 1969, posts, RR:
Reply 7, posted (15 years 7 months 3 weeks 2 days 10 hours ago) and read 5685 times:

Wow, the 777-200 can actually go at 0.92 ????????? Now that's really fast.

User currently offlineModesto2 From United States of America, joined Jul 2000, 2898 posts, RR: 5
Reply 8, posted (15 years 7 months 3 weeks 7 hours ago) and read 5646 times:

I was in a United 744 that was doing .87 at FL370.

User currently offlineDeltaAir From United States of America, joined May 1999, 1094 posts, RR: 0
Reply 9, posted (15 years 7 months 3 weeks 5 hours ago) and read 5642 times:

Between ATL-MCO, we were doing Mach .90 in a 777. We were in Orlando in around 35 minutes.

User currently offlineSkystar From Australia, joined Jan 2000, 1363 posts, RR: 2
Reply 10, posted (15 years 7 months 2 weeks 2 days 19 hours ago) and read 5628 times:

Ok, just to clear some of this up.


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).


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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