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Why Boeing 747-400's Cruising Speed Is 1100km/h?  
User currently offlineFlyboyOz From Australia, joined Nov 2000, 1969 posts, RR: 26
Posted (12 years 5 months 2 weeks 1 day 22 hours ago) and read 4568 times:

When I flew from HKG to SYD on Ansett B747-400, the cruising speed was 1100km/hr was shown on PTV and big screen.

I know B747-400's cruising speed is normally 930km/hr. How come the plane flew so fast? That is why I arrived in SYD one hour earlier!


The Spirit of AustraliAN - Longreach
17 replies: All unread, jump to last
 
User currently offlineAirbus Lover From Malaysia, joined Apr 2000, 3248 posts, RR: 9
Reply 1, posted (12 years 5 months 2 weeks 1 day 21 hours ago) and read 4510 times:

1100km/h is the ground speed contributed by the tail wind.

Actual airspeed might be 930km/h. i realized that too during flights to europe from asia.


User currently offlineTwa902fly From United States of America, joined Dec 1999, 3100 posts, RR: 4
Reply 2, posted (12 years 5 months 2 weeks 1 day 21 hours ago) and read 4495 times:

most likely a tail wind. I flew DEN-ORD in a 777 with crusing speed at 1060 km/h. which is above normal. we arrived early too.

-twa902fly
Chicago Illinois



life wasn't worth the balance, or the crumpled paper it was written on
User currently offlinePolAir From United States of America, joined May 2001, 893 posts, RR: 2
Reply 3, posted (12 years 5 months 2 weeks 1 day 21 hours ago) and read 4483 times:

One time when on LTU A333 from Tenerife to FRA we cruised at 1070km/h. We were late about one hour at takeoff, but captain told us to not worry, "I will catch up in the air". We landed in FRA about 15 minutes early.

User currently offlineLehpron From United States of America, joined Jul 2001, 7028 posts, RR: 21
Reply 4, posted (12 years 5 months 2 weeks 1 day 21 hours ago) and read 4472 times:

On Korean Air B744 from LAX to Seoul, we hit 1111km/h but it still took 12 hours. Where the jet stream related to this?


The meaning of life is curiosity; we were put on this planet to explore opportunities.
User currently offlineSiriwatthana From , joined Dec 1969, posts, RR:
Reply 5, posted (12 years 5 months 2 weeks 1 day 19 hours ago) and read 4437 times:

I flew from ORD - FRA with United B747-400 on tuesday.
speed : 1100km/h with tailwind ( jet stream)
tailwind : over 200km/h
altitude : 37.000ft - 39.000ft
We landed in FRA 45 min early !




User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 6, posted (12 years 5 months 2 weeks 1 day 19 hours ago) and read 4432 times:

I flew on a QF 767-300 from Adelaide- Sydney and our GS was 1050 km/h! That's pretty quick for a 767 and i thought that was quite impressive- must have been a hefty tailwind at our alt.

User currently offlinePtica2000 From Slovenia, joined Nov 2000, 142 posts, RR: 0
Reply 7, posted (12 years 5 months 2 weeks 1 day 18 hours ago) and read 4425 times:

I was flying FRA-SFO and I campared the ground speed I saw on PFD in cockpit and the one that was shown on a flight monitor in a cabin. I discovered that speeds were diferent.

User currently offlineGodbless From Sweden, joined Apr 2000, 2752 posts, RR: 16
Reply 8, posted (12 years 5 months 2 weeks 1 day 17 hours ago) and read 4410 times:

Siriwatthana,

I thought that UA only uses the 744 to FRA in the summer are they now used all year round? Or was your flight just an exception?

Back in 1995 I flew DFW-FRA on a LH A340 and we flew over 1000km/h too. And if the A340 can do that then every plane can...

Does anybody know when the tailwinds can gat dangerous for the plane?

regards,

Max

http://www.IntAviation.de.vu


User currently offlineMD From Finland, joined Oct 2001, 146 posts, RR: 0
Reply 9, posted (12 years 5 months 2 weeks 1 day 17 hours ago) and read 4404 times:


I flew AY MD-11 from JFK-HEL and we flew 1100km/hr.




///
User currently offlineSchreiner From Netherlands, joined Oct 2001, 960 posts, RR: 2
Reply 10, posted (12 years 5 months 2 weeks 1 day 17 hours ago) and read 4385 times:

Jetstream is very active in that area.


Soaring the internet...
User currently offlineAdria From , joined Dec 1969, posts, RR:
Reply 11, posted (12 years 5 months 2 weeks 1 day 16 hours ago) and read 4386 times:

I flew on a Srilankan A340 from Frankfurt ot Colombo and when we flew to the east(Frankfurt-Colombo) the airspeed was a little above 1000km/h but the way back the airspeed was 700-750km/h.the same thing happened on an Lauda Air B767-300ER flight to Miami from Vienna.The flight to Miami took longer than the one back.And if you look at te timetables you'll se that every plane that is flying to the east is faster than that one flying to the west.

User currently offlineDonder10 From Canada, joined Oct 2001, 6659 posts, RR: 22
Reply 12, posted (12 years 5 months 2 weeks 1 day 16 hours ago) and read 4366 times:

LHR-JFK takes abour an hour more than JFK-LHR.

User currently offlineFlyboyOz From Australia, joined Nov 2000, 1969 posts, RR: 26
Reply 13, posted (12 years 5 months 2 weeks 1 day 15 hours ago) and read 4346 times:

Wow! That's very interesting! Thanks


The Spirit of AustraliAN - Longreach
User currently offlineSiriwatthana From , joined Dec 1969, posts, RR:
Reply 14, posted (12 years 5 months 2 weeks 1 day 14 hours ago) and read 4332 times:

Godbles,
United Airlines have two flight`s from ORD to FRA.
UA940/UA941 Boeing B777-200ER
UA944/UA945 Boeing B747-400

www.ual.de/com

regards,

Bertram

HS-TGR B747-400 "Siriwatthana"



User currently offlineGodbless From Sweden, joined Apr 2000, 2752 posts, RR: 16
Reply 15, posted (12 years 5 months 2 weeks 1 day 13 hours ago) and read 4319 times:

Siriwatthana,

Thank you for the information! That is really good news!

regards,

max

http://www.IntAviation.de.vu


User currently offlineMatt777 From Cayman Islands, joined Oct 2001, 503 posts, RR: 6
Reply 16, posted (12 years 5 months 2 weeks 1 day 13 hours ago) and read 4321 times:

976 UA
767-300Er
JFK-LHR with a tail wind
PTV showed 1028 km/h groundspeed....

Regards from Argentina  Big thumbs up
Matt.


User currently offlineFlyboyOz From Australia, joined Nov 2000, 1969 posts, RR: 26
Reply 17, posted (12 years 5 months 2 weeks 1 day 5 hours ago) and read 4274 times:

Ok..thanks


The Spirit of AustraliAN - Longreach
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