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Fuel Exp Per ASK Vs Stage Length  
User currently offlineptahturan88 From Turkey, joined Nov 2013, 17 posts, RR: 0
Posted (2 years 6 months 2 weeks 6 days 21 hours ago) and read 3070 times:

Hi guys,

I was graphing fuel exp per ASK (y-axis) vs avg kilometers flown (x-axis) for both PGSUS AND THY. There's a strong negative correlation for PGSUS whereas a strong positive correlation for THY. What does that tell? Is it about being a LCC?
I thought the usual one is a negative correlation.

What do you think? Thanks in advance.

2 replies: All unread, jump to last
User currently onlineandrej From United Kingdom, joined Jun 2001, 1213 posts, RR: 0
Reply 1, posted (2 years 6 months 2 weeks 6 days 18 hours ago) and read 2964 times:

Try comparing other LCC (vs. PGSUS) and legacy (vs. THY). IMHO looking at two different airlines will not give you proper output (value-added).

Quoting ptahturan88 (Thread starter):
I thought the usual one is a negative correlation.

Why should the fuel expense decline with increased avg. km flown fuel?

I would also look at ASKM/RSKM vs. Fuel Exp. ASK (does/what is the relationship between the fuel expense increases vs. (increased) ASKM and RSKM).



User currently offlinemandala499 From Indonesia, joined Aug 2001, 7561 posts, RR: 76
Reply 2, posted (2 years 6 months 2 weeks 6 days 5 hours ago) and read 2824 times:

OK, what aircraft ? 737NGs I assume?
It does have to do with:
1. Their speed/cost index policy
2. Their 1st choice altitude policy
3. Payloads
4. Holding & Alternate policy

That, gives you the fuel burn in kg/km...
Now, then we go to:
5. Where and who do they buy fuel from? (vendor pricing policy)
6. Do they conduct tankering (this reflects on effects of #3 and #4)
(and the list goes on)

If this is not aircraft type specific, THY's diverse fleet would give that positive correlation instead of a negative one, as with widebodies, the difference in fuel burn per hour changes a lot throughout the whole flyable grossweight change... etc etc etc...

When losing situational awareness, pray Cumulus Granitus isn't nearby !
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