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What Are The Cruise Speeds Of Various A/C Types?  
User currently offlinec5load From United States of America, joined Sep 2008, 917 posts, RR: 0
Posted (4 years 5 months 6 days 23 hours ago) and read 4865 times:

I'm curious to know the cruise speeds of different aircraft. Really I just want to know major jetliners (Boeing, Airbus). I know in the C-5 we cruise at ~.77 Mach. What is the fastest jetliner cruise speed and what is the slowest?


"But this airplane has 4 engines, it's an entirely different kind of flying! Altogether"
14 replies: All unread, jump to last
 
User currently offlinetimz From United States of America, joined Sep 1999, 6819 posts, RR: 7
Reply 1, posted (4 years 5 months 6 days 23 hours ago) and read 4868 times:

You're probably asking what speeds do they cruise at-- not what speeds can they cruise at?

And you're asking about Mach, not TAS or IAS?

[Edited 2010-03-26 14:11:33]

User currently offlinemusang From United Kingdom, joined Apr 2001, 864 posts, RR: 7
Reply 2, posted (4 years 5 months 6 days 23 hours ago) and read 4852 times:

The limitation on 737 classics (i.e. -300, -400, -500) is .82. On the odd occasions when I've had to consult the FMC, i.e. considering real time weight, C of G, speed and density alt., I don't recall ever seeing more than .78 allowed.

Increasingly I fly slower if I can get away with it for fuel reasons, and consequently often find myself at .71.

Even at .77 I get the impression we are holding people up!

regards - musang


User currently offlinec5load From United States of America, joined Sep 2008, 917 posts, RR: 0
Reply 3, posted (4 years 5 months 6 days 22 hours ago) and read 4824 times:

Quoting timz (Reply 1):
You're probably asking what speeds do they cruise at-- not what speeds can they cruise at?

And you're asking about Mach, not TAS or IAS?

Correct, typical cruise speeds. Mach please. One of my friends in the Air Force claims that the KC-10 Extender cruises about .85, did the DC-10 normally do this?



"But this airplane has 4 engines, it's an entirely different kind of flying! Altogether"
User currently offlinesaab2000 From Switzerland, joined Jun 2001, 1610 posts, RR: 11
Reply 4, posted (4 years 5 months 6 days 21 hours ago) and read 4792 times:

When I sit in the jumpseat of the Airbus 320 series I usually see Mach .77 or .78.


smrtrthnu
User currently offlineTb727 From United States of America, joined Jun 2005, 1588 posts, RR: 9
Reply 5, posted (4 years 5 months 6 days 21 hours ago) and read 4790 times:

We have a nice high MMO on the 727 at 0.90M. The fastest I have done is 0.87M but the fastest we are ever planned for is 0.85M. Normally we are at 0.79-0.80M for fuel economy. The airplane doesn't like anything slower although occasionally we see 0.76M and even though it's not a big difference, it feels like we are crawling sometimes.

Early Learjets, although they look fast, are only good up to about 0.78M, I wouldn't trust that thing over that due to flutter and the weak tail so we did 0.76M for cruise. Falcon 20's can do 0.85M-0.88M but typically we we cruising them at 0.74M when down low.



Too lazy to work, too scared to steal!
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1608 posts, RR: 52
Reply 6, posted (4 years 5 months 6 days 20 hours ago) and read 4744 times:
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The numbers I have collected over the years:
A300: M=.80
A310: M=.80
A320: M=.78
A330: M=.82
A340-200 and -300: M=.82
A340-500 and -600: M=.83
A350: M=.84
A380: M=.85
737-100 and -200: M=.73
737 Classics: M=.745
737NGs: M=.787
747-100 and -200: M=.84
747-300 and -400: M=.85
747-8: M=.855
757: M=.80
767: M=.80
777: M=.84
787: M=.85
MD80: M=.76
MD90: M=.76
717: M=.77
MD11: M=.83
HS Trident: M=.86
Caravelle: M=.73
VC-10: M=.83


User currently offlinedw747400 From United States of America, joined Aug 2001, 1259 posts, RR: 1
Reply 7, posted (4 years 5 months 6 days 20 hours ago) and read 4736 times:

Quoting c5load (Reply 3):
One of my friends in the Air Force claims that the KC-10 Extender cruises about .85, did the DC-10 normally do this?

Though most airlines cruise DC-10s around M.82 (if I recall correctly), M.85 would be perfectly reasonable for the airframe if fuel burn wasn't a prime consideration.

The 747 varies a lot depending on weight, temperature, model, and airline procedures. 747-400s seem to be happiest between M.82 and M.86, with Boeing listing M.85 as a typical cruise speed. The VC-25A often cruises in excess of M.88.

Not sure about commercial 737s, but our BBJs typically do between M.80 and M.82, though to get max range we need to slow them down a bit. Our 767 typically runs at M.80.

The speed champion of civil aircraft, at least for a while longer, is the Cessna Citation X. Most operators plan between M.85 and M.90. Under certain conditions, we've run them as fast as M.92.



CFI--Certfied Freakin Idiot
User currently offline413X3 From United States of America, joined Jul 2008, 1983 posts, RR: 0
Reply 8, posted (4 years 5 months 6 days 18 hours ago) and read 4692 times:

.85 or .86 sometimes in the 744F

User currently offlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4195 posts, RR: 37
Reply 9, posted (4 years 5 months 6 days 15 hours ago) and read 4634 times:

Depending on cost index put in the FMS, weight, altitude, and such, in the 757/767 it's anywhere between .77 to .82...most typically being around .78.


Chicks dig winglets.
User currently offlineThePinnacleKid From United States of America, joined Feb 2005, 725 posts, RR: 8
Reply 10, posted (4 years 5 months 6 days 4 hours ago) and read 4456 times:

I know the OP was talking Boeing/Airbus equipment.. and "mainline" planes.. but as long as RJ's have a large chunk of the US domestic landscape... might as well throw in my numbers...

ERJ-135ER-LR/145EP-LR's - MMO 0.78 - typical cruise is 0.76-0.77
ERJ-145XR - MMO 0.80 - typical cruise is 0.78-0.79



"Sonny, did we land? or were we shot down?"
User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2255 posts, RR: 15
Reply 11, posted (4 years 5 months 6 days 3 hours ago) and read 4438 times:

Quoting AeroWeanie (Reply 6):
MD11: M=.83

Keep in mind that this is only the avg econ mach not max. We've done .85 a number of times when ATC request best forward speed.


User currently offlineboeingfixer From Canada, joined Jul 2005, 530 posts, RR: 0
Reply 12, posted (4 years 5 months 6 days 3 hours ago) and read 4422 times:

Our 727-200's are flight planned with .80 going east and .82 going west.

Cheers,

John



Cheers, John YYC
User currently offlinecv640 From United States of America, joined Aug 2000, 952 posts, RR: 5
Reply 13, posted (4 years 5 months 4 days 18 hours ago) and read 4008 times:

No one has brought up the mighty DC-9, but it looks to be the similar to the MD80 series at M .76

User currently offlineDashTrash From United States of America, joined Aug 2006, 1527 posts, RR: 2
Reply 14, posted (4 years 5 months 2 days 23 hours ago) and read 3824 times:

DHC-8-100: 245
DHC-8-200: 275
DHC-8-300: 265
CE-750: .88-.92. LRC: .80
N-265: Mmo= .82, cruise usually around .74 for economy
757-200 transatlantic, usually around .76


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