MD-90 From United States of America, joined Jan 2000, 8422 posts, RR: 13 Posted (9 years 5 months 2 weeks 3 hours ago) and read 4844 times:
All data taken from the 2001/2002 edition of The International Directory of Civil Aircraft, which a.net uses for its own aircraft data section. All of the numbers, are, of course, in knots, which does vary and isn't actually as good of an indicator as the maximum mach operating speed, but that was available for only a few aircraft. The knots figure should be a good way to compare aircraft, even though altitude and temperature both affect airspeed expressed in knots.
I draw 2 conclusions:
a). Older jets are faster than newer jets due to gas costs.
b). As a plane is stretched, it gets slower.
Flat out max speed:
549 - 727-100/200
545 - 707-120B and 707-320B and 720B
540 - 747SP
538 - 747-300
530 - 747-200B
530 - DC-10-30
509 - 737-100/200
395 - Piaggio P.180 Avanti
MD-90 From United States of America, joined Jan 2000, 8422 posts, RR: 13 Reply 4, posted (9 years 5 months 2 weeks 1 hour ago) and read 4691 times:
Well, the list was getting really long so I omitted the bizjets for clarity. Besides, these forums are always so heavy iron centric that even a Global Express is hard pressed to attract much interest. But Maiznblu_757, I think your chart records airspeed at a certain altitude, which is why it only shows the Citation X going 475 knots. Ohhh it can go fasterrrr...
Bekol From Hong Kong, joined Jun 2001, 44 posts, RR: 0 Reply 7, posted (9 years 5 months 1 week 6 days 17 hours ago) and read 4403 times:
I have read that the B747SP can reach up to Mach 0.92 (forgot the sources).. But I don't know if it's max cruise speed or normal cruise speed.. Also, md-11 are also very fast, flying at M0.86 at normal.. I am use it's faster than B747-400 (M0.84-85) as I flew on one before in the cockpit and the captain told me that the MD-11 (of swissair) was flying above us at a faster speed. I love the airbus as well but A330/A340 normal cruise speeds are just about M0.78-0.82)
Dw747400 From United States of America, joined Aug 2001, 1245 posts, RR: 1 Reply 10, posted (9 years 5 months 1 week 6 days 15 hours ago) and read 4187 times:
As you said in the first post, knots are a fairly poor indicator of speed. And some of those numbers do not seem right. For example, the 777-300 is actually faster than the 777-200 (.85 compared to .84).
Thrust From United States of America, joined Sep 2003, 2674 posts, RR: 11 Reply 14, posted (9 years 5 months 1 week 5 days 12 hours ago) and read 3790 times:
Look in the earlier Boeing jets, like the 707, the 727, the 737-200, and the 747. Also, the Douglas DC-8 too. The 707 and the DC-8 cruised at Mach 1, The 737-200, the 727, and the 747 all flew faster than 570 miles per hour. The 747 and the 737-200 cruise at 575 mph. The 727 cruises somewhere from 570-575. The newer jetliners like the 757 and 767 cruise at 530 mph typically, as well as the CFM-56 powered 737s. The 777, however, while slower than the 747, 727, 737-200, and 707 and DC-8, has actually altered one of your claims, MD-90. The 777 cruises at 555 mph, almost reclaiming the speed of the 757 and 767's predecessors. Stretching an aircraft I imagine would make it slower, because it increases the weight of the plane. Maybe the Boeing 7E7 will be even faster than the 777.
Dw747400 From United States of America, joined Aug 2001, 1245 posts, RR: 1 Reply 17, posted (9 years 5 months 1 week 5 days 7 hours ago) and read 3549 times:
None of the airliners you mentioned are supersonic, nor are your relative speeds correct. Below are typical cruise speeds for the aircraft you mentioned. Not sure of the mach numbers for the 707, 727, and DC-8, but I'd bet money the 747 is faster.
Dw747400 From United States of America, joined Aug 2001, 1245 posts, RR: 1 Reply 19, posted (9 years 5 months 1 week 5 days 5 hours ago) and read 3455 times:
I can't vouch for a specific airlines operating policy, but Boeing states clearly, both on their website and through a number of other sources, that the 737NGs cruise at .785. Older models cruise at .74 to .75.
I've also had this verified by pilots at US Airways and Southwest.