c5load
Topic Author
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 9:00 pm

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"
 
timz
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 9:10 pm

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]
 
musang
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 9:21 pm

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
 
c5load
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 9:47 pm

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"
 
saab2000
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 10:46 pm

When I sit in the jumpseat of the Airbus 320 series I usually see Mach .77 or .78.
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tb727
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 10:51 pm

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.
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aeroweanie
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What Are The Cruise Speeds Of Various A/C Types?

Fri Mar 26, 2010 11:53 pm

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
 
dw747400
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What Are The Cruise Speeds Of Various A/C Types?

Sat Mar 27, 2010 12:01 am

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.
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413X3
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What Are The Cruise Speeds Of Various A/C Types?

Sat Mar 27, 2010 1:44 am

.85 or .86 sometimes in the 744F
 
XFSUgimpLB41X
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What Are The Cruise Speeds Of Various A/C Types?

Sat Mar 27, 2010 5:22 am

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.
 
ThePinnacleKid
Posts: 497
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What Are The Cruise Speeds Of Various A/C Types?

Sat Mar 27, 2010 4:08 pm

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
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CosmicCruiser
Posts: 2097
Joined: Tue Feb 22, 2005 3:01 am

What Are The Cruise Speeds Of Various A/C Types?

Sat Mar 27, 2010 4:57 pm

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.
 
boeingfixer
Posts: 573
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What Are The Cruise Speeds Of Various A/C Types?

Sat Mar 27, 2010 5:21 pm

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

Cheers,

John
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cv640
Posts: 843
Joined: Wed Aug 30, 2000 8:10 pm

RE: What Are The Cruise Speeds Of Various A/C Types?

Mon Mar 29, 2010 1:50 am

No one has brought up the mighty DC-9, but it looks to be the similar to the MD80 series at M .76
 
DashTrash
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RE: What Are The Cruise Speeds Of Various A/C Types?

Tue Mar 30, 2010 8:44 pm

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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