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Author Topic: A330-200 Fuel Burn  (Read 2046 times)

Offline ZombieSlayer

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A330-200 Fuel Burn
« on: September 03, 2015, 12:23:29 PM »
This has long irked me and I have finally come across some independent data to back up my suspicion that there is no way the A330-200 burns more fuel than the A330-300. They have the same engines, yet the 332 is significantly lighter which should correlate to lower fuel burn on identical routes. The A330-200 will still have a higher fuel burn per passenger, but lower total fuel burn.

Please refer to Pg. 18 of this document:

http://www.team.aero/images/aviation_data_insert/Owners_OperatorsGuide_A330.pdf

A brief summary, observed fuel burn on LAX-LGA was 3.654 usg/nm for the 332, 3.882 usg/nm for the 333. On LAX-ARN, it is 3.778 usg/nm for the 332 and 4.042 ugs/nm for the 333.

This is the complete opposite of what is currently the norm in AWS.
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Offline Sami

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Re: A330-200 Fuel Burn
« Reply #1 on: September 03, 2015, 12:29:49 PM »
According to the source data used for the model A332 cruise fuel burn on cruise at FL370, midweight, is about 5600kg/hr, and for A333 about 4800 kg/hr. And 6300/5300 for a higher weight scenario.

A330-300 is lighter in terms of weight (MTOW), not the other way around like you said (looking at the baseline variants).

Checked the actual A330-300 flight manual, chapter Peformance-Cruise-Cruise Tables. Cruise at Mach 0.82, standard conditions, FL370, 200tn weight says the fuel flow is 2900kg/hr/engine -> total 5800kg/h. For a mid-weight scenario (160tn) the flow is 2473/engine -> 4946kg/h. Don't have the A330-200 manual here to check it's values, but these A333 ones are rather close to what the other source says (5300 vs 4800) - but the weight and level have a big effect here.
« Last Edit: September 03, 2015, 12:51:06 PM by sami »

Offline ZombieSlayer

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Re: A330-200 Fuel Burn
« Reply #2 on: September 03, 2015, 12:39:33 PM »
MTOW is the same for the 332 and 333 (at the max weight version of the 333, at least, shorter range 333 variants have lower MTOW), however MZFW is about 11,000lbs less for the 332, roughly 374,850lbs for the 332 and 385,875 for the 333 (so not "significantly" lighter, bur lighter none the less). Another item to take into consideration here is average mission. I would assume that the average stage length of the longer legged 332 would be longer, which would equate to higher fuel loads, higher actual take off weights, and therefore higher observed fuel burn on those flights.

the data presented in the provided link shows a lower fuel burn for the 332, and also Air Berlin claims a 5,300kg/hr burn for their 332's here http://www.airberlin.com/site/seatplan.php?seatTyp=A330_200_1
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Offline Sami

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Re: A330-200 Fuel Burn
« Reply #3 on: September 03, 2015, 12:47:41 PM »
Another item to take into consideration here is average mission. I would assume that the average stage length of the longer legged 332 would be longer, which would equate to higher fuel loads, higher actual take off weights, and therefore higher observed fuel burn on those flights.

That's not relevant at all, since AWS fuel burn is not a static single "kg/hr" value but it is calculated for each flight separately based on four climb segments to the maximum possible flight level (based on weight, climb rate, and route distance) and then cruise, and then four different descent segments. If the values set for the aircraft type are correct, the results are almost directly comparable to a real flight's fuel actual burn on the same sector. (used the A320 as a reference to compare the AWS and real life fuel burns)

But if someone can dig the A330-200 FCOM (volume 3), it provides the definiteve answer then, since it has the fuel burn tables. As mentioned I have only the -300..

The empty weight (OEW) of the A330-300 seems to be about 3 tonnes more than for the -200, which would suggest that the -300 should not burn less fuel (MZFW isn't really relevant) since the airframe is heavier. But the fuel burn values are modelled after the MTOW case, so that's the only really relevant factor and the basic variant of the -300 has some 15tn lower MTOW than the basic variant of -200.


edit; Found only a generic A330 manual that has the same values that my -300 variant's manual. So no luck in finding any other sources.
« Last Edit: September 03, 2015, 02:21:03 PM by sami »

Offline ZombieSlayer

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Re: A330-200 Fuel Burn
« Reply #4 on: September 03, 2015, 02:34:43 PM »
I think I found what you need, but cant read it on my phone. Will post when i get back to a pc.
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Offline ZombieSlayer

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Re: A330-200 Fuel Burn
« Reply #5 on: September 03, 2015, 04:48:03 PM »

edit; Found only a generic A330 manual that has the same values that my -300 variant's manual. So no luck in finding any other sources.

I assume this is the one you found

http://www.avialogs.com/en/aircraft/europe-and-consortiums/airbus/a330/airbus-330-fcom-flight-operations-volume-3.html

Lufthansa A330, seems pretty generic....still searching, though.
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Offline Sami

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Re: A330-200 Fuel Burn
« Reply #6 on: September 03, 2015, 05:30:12 PM »
That's not downloadable without paying. The one I mentioned was for Air Algerie (they seem to have only -200 in their fleet, but the performance chapter is identical to my -300 manual...hmm).

Offline ZombieSlayer

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Re: A330-200 Fuel Burn
« Reply #7 on: September 03, 2015, 05:43:29 PM »
It is not downloadable, but I was able to view all 400 odd pages of it online. Is there any specific area I should be searching for information in that document? Other than that, I have not had much luck finding an A330-200 specific FCOM and I have now been searching for 2 hours. The information has to be there, though. All the information I am finding points to average fuel burn on the 332 being between 5,000kg/hr and 5300kg/hr, although it is not Airbus "official" information. I am pretty sure airbus would not have sold almost 700 332's if they were essentially 20% less efficient than the 333, though, especially since until recently they only came with about another 1,000nm of useful range! It seems it would have been far more of a niche aircraft if that were the case.

I will keep searching and post any info I find here.
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Offline Sami

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Re: A330-200 Fuel Burn
« Reply #8 on: September 03, 2015, 06:43:04 PM »
Look for chapter 3.05.15, inflight cruise, and this kind of table.. (my vol 3 has ~1200 pages though and this is on page 895)

But probably it can't be found on the public internet, so if there's any other/alternative material, drop them here.

Offline ZombieSlayer

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Re: A330-200 Fuel Burn
« Reply #9 on: September 03, 2015, 09:07:10 PM »
I have M.80 and M.82 here. Several more if you need them. The charts start around pg. 640 in the Lufthansa 330 FCOM. (http://www.avialogs.com/en/aircraft/europe-and-consortiums/airbus/a330/airbus-330-fcom-flight-operations-volume-3.html)
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Offline Sami

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Re: A330-200 Fuel Burn
« Reply #10 on: September 04, 2015, 04:37:25 AM »
Hum, yes the only problem (just noticed) is that LH does not have any A330-200s in their fleet currently, and that extract doesn't specify the models or MSNs this is for. So probably the figures of a -300 since they are so close to the ones I pasted earlier (less than 50kg difference in the fuel flow lines; the FL370/200tn was 2899 in my file and here 2881..)

Offline hmellouli

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Re: A330-200 Fuel Burn
« Reply #11 on: January 29, 2016, 05:39:32 PM »
I might be able to ask our Airbus rep for data. Any specific information/tables, other than in flight performance? I don't think I can ask for manuals, but I'll see what I can get.

 

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