Takeoff distance A330-300...

[Robini]

Hello everyone!
I´m searching for information about the takeoff distance for
an A333. Yeah of course it depends on many factors as wind,
runway length,temp.,contaminated runways and so on...
But if i say flight time about 6 hours and 0 degress celsius and
15 knots of headwind and 405 pax and RR Trent engines and dry rwy.
I´m very happy if anybody here could estimate the takeoff distance
for me :)

//Robin

[Robini]

Oh, sorry i forget one of the most important things, the runway length...
If i say full thrust takeoff.

[Doors to Automatic]

405 pax!?? I doubt it would get off the ground! :confused:

[Down Three Greens]

407 pax = say 4 x 91 = 37000
6 hrs flt time plus landing with 7 tonnes = 42000
Basic weight 128T roughly.

TOM = 207T

Config 3
Oat=0
airfield = 0ft
runway = 2000m
MTOM = 219.7T

Config 3
Oat=0
airfield = 2000ft
runway = 2000m
MTOM = 209.7T

Lowest figure available in fcom.

For interest we will be taking 407 Hajj'es on flight times up to 10hrs on an A330-300

Rgrds

DTG

[Robini]

Yeah, thanks but what would the takeoff distance be for an A333???
Pax: (winter only 405 pax and inc. baggage) 405*85= about 34,5 t
cargo: about 15 t
fuel:42 t
empty weight: 128 t

TOM: 219,5 t

As i said do you know what the takeoff distance would be in the
conditions that i said from the beginning?? :ok:

EDIT: Of course you´re right about the weight you´re a pilot of course :ok:

[Robini]

I´ve got one question for Down Three Greens or somebody else
who knows what he mean.
I did´nt understand what you mean with this:

Config 3
Oat=0
airfield = 0ft
runway = 2000m
MTOM = 219.7T

Config 3
Oat=0
airfield = 2000ft
runway = 2000m
MTOM = 209.7T

When you say runway is that the takeoff distance or the runway
requirement?
Is these facts based on full thrust?

// Robin

[OsPi]

The MTOM is limited to 219,7T at sea level or 209,7T if the airport is at 2000 ft with a 2000 m long runway.

I suppose you're still interested in GSE which is almost at SL (65') so your 207T are within the limits.

[Robini]

But at GSE (and i think every airport in sweden) you can only use
80% of the runway.
2000*0,8= 1600 m,and before you reach these 1600 meters you must
climb to (35 feet??)...I guess that´s impossible...
And my question was how long of a runway an A333 use if it use full
thrust in these conditions i wrote above, somebody who knows??

[Robini]

Somebody who knows??

[Robini]

I guess that i wrote a little bit strange, but i can make it easier for
you guys...:ok:
I´m very interested in performance, and the question was how long
the takeoff run distance :ok:(distance from start rolling to the lift off
moment) was for an A333 in just a normal winterday with full available thrust??Somebody who knows??
I hope that you understand now,if you don´t please write :ok:

[Robini]

Sorry if i nag on you guys, but i really need this info for tomorrow :sad:

[Robini]

Now i have checked this out :ok:

Pax: 405*75= 30,3 t
baggage: 405*15= about 6 t
cargo and other stuff: 15 t
fuel: 42 t
Empty weight 128t

TOM: just above 221 t...

[Robini]

How long is the TOD for the A330??

[Consol]

Robini,
I don't know if you're doing a school project or something but there is a little more to aircraft performance than I think you are reckoning on.
There is no simple answer. The take off distance will depend on a number of variables. We don't normally use the calculations to find the take off distance, rather we use the TODA (and TORA and ASDA + obstacles) to determine the weight we can take off at. Its economics. The only correct data is from a current aircraft manual (FCOM) performance section or its electronic counter part. In any case you will only know the exact met details just before the flight which will determine the take off weight possible. Also you don't have to use only 80 % of a runway for take off calculations. They are unfactored because you will either be commited to stop or go depending on when the failure happens.
So long as the runway length and conditions alow the weight we don't really worry about the exact spot we lift of from, its all safe and legal so long as you have calculated your take off weight from the correct data.
Sorry if this is not what you are looking for but I hope it helps.

[Robini]

Yeah thanks Consol you helped me a lot ;)
Somebody who knows about how long the TOD is for an A330
at these conditions i wrote above?

[Robini]

When im at GOT/ESGG i always see the A330 use 2000-2500 m of
the 3300 m runway, is that a flex thrust takeoff??

[Consol]

Thanks Robini,
Just to add to your last question. A flex thrust take off means reducing thrust because you have excess runway and climb gradient to what is required (being quite light or having a very long runway). It is done to reduce engine temperatures and prolong their life, again it economics. Of course it will use more runway but you have it to spare. As your original question is about getting a very large load airborne it is less likely to be relevant. If you are limited you will use TOGA (full) thrust. This is the most thrust you can produce. These figures are published in a manual with runway specific data and is used before each take off. As I said it is weight and met data you use, the runway length is a given that you cannot change. Using more flaps (Conf3) can shorten runway required but gives a lower climb gradient, this can often cost you more weight.
Performance is an interesting subject but maybe it would be better to study up on some of the theory and terms used. There are some good threads in the Tech forum which may help.
Sorry I can't give you specific figures, I do know a heavy 330 will normally lift off after 2000m plus but as I said many variables. Best of luck.

[Robini]

Thanks a lot! Now i dont have any problems;) ;) ;) ;)

//a happy Robin

[Virtual Reality]

Hi Robini, with the environmental data given by you in your 1st post, A333 (Heavy weight version) could take-off at MTOW (233 tons) from a 7900 ft runway length. Sorry not sure the t/off distance.

[Robini]

Hello!
I was in GOT today for some flightspotting, and i saw the A333 (OY-VKG)
took of and used about 2200 m is that full thrust (the engines sound was
very quiet...)??

[john_tullamarine]

the question was how long is the takeoff run (distance from start rolling to the lift off moment) ..[paraphrased a bit]

it might be a good idea to revisit your book of definitions .. TOR is a bit longer than the above ... as, for example, in FAR 25.113(c)(1) (http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr;sid=f6335df39ded2980f3dc9a6ad0a55bc3;rgn=div8;vie w=text;node=14%3A1.0.1.3.11.2.155.14;idno=14;cc=ecfr). Please be careful to distinguish between takeoff RUN and DISTANCE .. two different animals serving different needs.

[Robini]

Sorry i havent read this before :ok:
But i still dont understand, whats the distance called from
start rolling to the gear is just in the air??

[john_tullamarine]

.. generally "unstick distance" or something similar ... it doesn't have any great significance in the civil arena (but may well for military operations).

The idea of "takeoff run" is to provide a boundary to the use of clearway by ensuring that there is a high probability that an aeroplane will be off the seal a bit before the end of the physical runway length .. would be embarrassing to see a heavy kicking up grass and dirt.

Mind you, it does happen occasionally when the crew get the calcs wrong ... MEL 27 has seen its share of heavies in the grass when they mixed up 27 and 34 in the calcs ...

[Robini]

hehe yeah thats true ;)
But as i said,when i was in GOT today the A333 used 2200 m of the
3300 m ,is that a flex takeoff??
Im so sad beacuse im not a pilot, maybe never too... :(

[Robini]

1.When i was flying in the A333 from HKT to SHJ she used a little less
runway (we used about 2000 m) and she was going 20 minutes longer
than from GOT to SHJ...??

2.And the second problem is that the A332 flies from VXO (only 2100 m)
how is that possible??

//Robini