airmale
Posts: 7125
Joined: Fri Sep 17, 2004 4:48 pm

Climb Speeds Vary For 747; Why?

Thu Dec 05, 2002 12:35 am

Last evening I saw a PIA 742 doing a high speed climb en route to Jeddah, its a daily service and I have seen it uncountable times in many of which the climb has been so slow and loud, like the aircraft is straining to stay airborne, rather scary. So why was this plane going really fast?
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Mr.BA
Posts: 3310
Joined: Sun Sep 24, 2000 12:26 pm

RE: Climb Speeds Vary For 747; Why?

Thu Dec 05, 2002 12:38 am

Hi Airmale,

When you say you saw a PIA B742 doing a high speed climb to Jeddah, do you mean just after take-off?
Boeing747 万岁!
 
airmale
Posts: 7125
Joined: Fri Sep 17, 2004 4:48 pm

RE: Climb Speeds Vary For 747; Why?

Thu Dec 05, 2002 12:43 am

Yes, it was less than five minutes into climbing.
.....up there with the best!
 
Mr.BA
Posts: 3310
Joined: Sun Sep 24, 2000 12:26 pm

RE: Climb Speeds Vary For 747; Why?

Thu Dec 05, 2002 12:51 am

I can't think of any significant difference in speed JUST after take-off. A heavier B747 will climb faster in terms of speed and at a lower rate of climb than a lighter B747.
Boeing747 万岁!
 
Leezyjet
Posts: 3540
Joined: Sun Oct 14, 2001 7:26 am

RE: Climb Speeds Vary For 747; Why?

Thu Dec 05, 2002 6:41 am

Take off/climb speeds vary on all a/c for a number of reasons such as :-

take off weight of the aircraft, temperature, pressure, altitude of airport above sea level, weather, runway contamination, obstacles such as mountains/cranes etc, any restrictions on the a/c due to tech problems...the list goes on.

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"She Rolls, 45 knots, 90, 135, nose comes up to 20 degrees, she's airborne - She flies, Concorde Flies"