b747 200/400

[brs planespotter]

this is hyperthetical question!you have a b747-200 and b744 both fueld too max and both depart heathrow.obviously weather/headwinds,i am guessing the 200 would be able too do 12hrs non stop,the 400 maybe 15?i would imagine the airbus a340 would be in the same catergory?thanks guys and gals!brs:ok:

[TSR2]

What's the question?

[brs planespotter]

how far in hours they can both fly

[Jofm5]

There is no such thing as a silly question only a silly answer.

from what I understand there are many parameters that may effect the duration/fuel consumed/distance equation - these are not limited to:-

Weather - tail/headwind.
Weight - Pax & cargo on board.
Altitude - density will effect the drag.
Ambient Temprature.

Etc etc. - I am not in a position to answer your question as I am in no way familiar with the aircraft types - but you should be able to google the stated from the manufacturers website(s) which will be based upon a standard set of parameters.

[warmkiter]

in a B744 you can put roughly 150 000 kg of fuel if a 12 000kg tailtank is installed, so this gives you about 15hours of flight time. you can calculate the average fuelflow with a rate of 10 000kg an hour.

all planes have different tankoptions, so even if its the same plane/model, you can not say how much endurance it has. the operator chooses to buy the preferable range and the manufacturer builds in the necessary tanks.

so you can have planes with extra centertanks(airbus) or tailtank (B744) and so on....

cheers

L

[Rhys S. Negative]

The figures below come from Aviation Week magazine's annual 'source data' edition.

type / best cruise Mach / still air range (mi)
B747-200B / 0.84 / 6560
B747-400 / 0.85 / 7225

A340-200 / 0.82 / 9210
A340-300 / 0.82 / 8640
A340-500 / 0.83 / 9960
A340-600 / 0.83 / 8810

If you say that 0.82M is about 540mph at typical cruise altitude, and 0.85M = 560mph, you could produce some figures for maximum endurance (neglecting climb and descent).

HTH, Rhys.

[betpump5]

I'm guessing you just want a basic answer as I'm sure you are aware of many factors that could affect the flight time.

A 744 with no cargo/pax with full fuel could potentially fly for 20 hours. Just look at the Qantas delivery flight in the 80s that completed a non-stop LHR-SYD flight. I believe quite a few seats were ripped out on this flight as well.

The basic figures I would give are 12 hours for a 742 and 16 hours for a 744.

[warmkiter]

just for your info

wind, Mach, TAS and so on have nothing to do with endurance

endurance is time,means how long can you keep the plane flying

range is the distance how far can you fly, thats where your factors are concerning...


cheers