Why Boeing 747-400's Cruising Speed Is 1100km/h? — Civil Aviation Forum

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Why Boeing 747-400's Cruising Speed Is 1100km/h?

FlyboyOz From Australia, joined Nov 2000, 1893 posts, RR: 28
Posted (11 years 7 months 2 weeks 6 days 10 hours ago) and read 2795 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

Airbus Lover From Malaysia, joined Apr 2000, 3248 posts, RR: 10
Reply 1, posted (11 years 7 months 2 weeks 6 days 9 hours ago) and read 2737 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.

Twa902fly From United States of America, joined Dec 1999, 3053 posts, RR: 4
Reply 2, posted (11 years 7 months 2 weeks 6 days 9 hours ago) and read 2722 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

PolAir From United States of America, joined May 2001, 893 posts, RR: 2
Reply 3, posted (11 years 7 months 2 weeks 6 days 9 hours ago) and read 2710 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.

Lehpron From United States of America, joined Jul 2001, 7028 posts, RR: 22
Reply 4, posted (11 years 7 months 2 weeks 6 days 9 hours ago) and read 2699 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.

Siriwatthana From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 7 months 2 weeks 6 days 7 hours ago) and read 2664 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 !

Positive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 6, posted (11 years 7 months 2 weeks 6 days 7 hours ago) and read 2659 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.

Ptica2000 From Slovenia, joined Nov 2000, 142 posts, RR: 0
Reply 7, posted (11 years 7 months 2 weeks 6 days 6 hours ago) and read 2652 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.

Godbless From Sweden, joined Apr 2000, 2751 posts, RR: 17
Reply 8, posted (11 years 7 months 2 weeks 6 days 5 hours ago) and read 2637 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

MD From Finland, joined Oct 2001, 146 posts, RR: 0
Reply 9, posted (11 years 7 months 2 weeks 6 days 5 hours ago) and read 2631 times:

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

///

Schreiner From Netherlands, joined Oct 2001, 960 posts, RR: 2
Reply 10, posted (11 years 7 months 2 weeks 6 days 4 hours ago) and read 2612 times:

Jetstream is very active in that area.

Soaring the internet...

Adria From , joined Dec 1969, posts, RR:
Reply 11, posted (11 years 7 months 2 weeks 6 days 4 hours ago) and read 2613 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.

Donder10 From Canada, joined Oct 2001, 6659 posts, RR: 23
Reply 12, posted (11 years 7 months 2 weeks 6 days 4 hours ago) and read 2593 times:

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

FlyboyOz From Australia, joined Nov 2000, 1893 posts, RR: 28
Reply 13, posted (11 years 7 months 2 weeks 6 days 2 hours ago) and read 2573 times:

Wow! That's very interesting! Thanks

The Spirit of AustraliAN - Longreach

Siriwatthana From , joined Dec 1969, posts, RR:
Reply 14, posted (11 years 7 months 2 weeks 6 days 2 hours ago) and read 2559 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"

Godbless From Sweden, joined Apr 2000, 2751 posts, RR: 17
Reply 15, posted (11 years 7 months 2 weeks 6 days 1 hour ago) and read 2546 times:

Siriwatthana,

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

regards,

max

http://www.IntAviation.de.vu

Matt777 From Cayman Islands, joined Oct 2001, 503 posts, RR: 7
Reply 16, posted (11 years 7 months 2 weeks 6 days 1 hour ago) and read 2548 times:

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

Regards from Argentina Big thumbs up

Matt.

FlyboyOz From Australia, joined Nov 2000, 1893 posts, RR: 28
Reply 17, posted (11 years 7 months 2 weeks 5 days 17 hours ago) and read 2501 times:

Ok..thanks

The Spirit of AustraliAN - Longreach

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