c5load From United States of America, joined Sep 2008, 917 posts, RR: 0 Posted (3 years 1 month 3 weeks 5 days 4 hours ago) and read 3502 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"
timz From United States of America, joined Sep 1999, 6466 posts, RR: 8 Reply 1, posted (3 years 1 month 3 weeks 5 days 4 hours ago) and read 3505 times:
You're probably asking what speeds do they cruise at-- not what speeds can they cruise at?
musang From United Kingdom, joined Apr 2001, 754 posts, RR: 7 Reply 2, posted (3 years 1 month 3 weeks 5 days 4 hours ago) and read 3489 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!
c5load From United States of America, joined Sep 2008, 917 posts, RR: 0 Reply 3, posted (3 years 1 month 3 weeks 5 days 3 hours ago) and read 3461 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"
Tb727 From United States of America, joined Jun 2005, 1374 posts, RR: 4 Reply 5, posted (3 years 1 month 3 weeks 5 days 2 hours ago) and read 3427 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.
AeroWeanie From United States of America, joined Dec 2004, 1600 posts, RR: 52 Reply 6, posted (3 years 1 month 3 weeks 5 days 1 hour ago) and read 3381 times:
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 From United States of America, joined Aug 2001, 1244 posts, RR: 1 Reply 7, posted (3 years 1 month 3 weeks 5 days 1 hour ago) and read 3373 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.
413X3 From United States of America, joined Jul 2008, 1983 posts, RR: 0 Reply 8, posted (3 years 1 month 3 weeks 4 days 23 hours ago) and read 3329 times:
XFSUgimpLB41X From United States of America, joined Aug 2000, 3952 posts, RR: 36 Reply 9, posted (3 years 1 month 3 weeks 4 days 20 hours ago) and read 3271 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.
ThePinnacleKid From United States of America, joined Feb 2005, 672 posts, RR: 9 Reply 10, posted (3 years 1 month 3 weeks 4 days 9 hours ago) and read 3093 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
CosmicCruiser From United States of America, joined Feb 2005, 2211 posts, RR: 16 Reply 11, posted (3 years 1 month 3 weeks 4 days 8 hours ago) and read 3075 times:
cv640 From United States of America, joined Aug 2000, 948 posts, RR: 6 Reply 13, posted (3 years 1 month 3 weeks 2 days 23 hours ago) and read 2645 times:
No one has brought up the mighty DC-9, but it looks to be the similar to the MD80 series at M .76
DashTrash From United States of America, joined Aug 2006, 1314 posts, RR: 4 Reply 14, posted (3 years 1 month 3 weeks 1 day 4 hours ago) and read 2461 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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