Sonic
Topic Author
Posts: 1505
Joined: Mon Jan 24, 2000 3:10 am

Same A/c, Same Engines, Larger Cost Per Km - Why?

Wed Jan 21, 2009 10:55 pm

Hello,

The SAS in-flight magazine (Scanorama) has details about aircraft of the airlines at least partly owned by SAS (such as Estonian Air, Air Baltic, etc.). Among the information provided there is operational costs. I noticed that cost per seat per kilometer for the same aircraft type and modification and same number of seats and with the same engines differs in different airlines quite much (by as much as 20% if I remeber correctly). Why is it so?

[Edited 2009-01-21 15:04:25]
 
nomadd22
Posts: 1566
Joined: Fri Feb 22, 2008 7:42 pm

RE: Same A/c, Same Engines, Larger Cost Per Km - Why?

Wed Jan 21, 2009 11:33 pm

The length of the flight. How often they refuel, which would affect their average fuel load. How much cargo they carry. Mostly the length of the flight. A plane making 400 mile hops is going to use a lot more fuel per mile than one making 4,000 mile trips.
Anon
 
greasespot
Posts: 2955
Joined: Sat Apr 24, 2004 10:48 am

RE: Same A/c, Same Engines, Larger Cost Per Km - Why?

Thu Jan 22, 2009 12:20 am

Plus they maybe the same family of engines but different dash numbers.....Like the previous company i worked for and the JT8D's

The b 737-200C could use the -9A, 15, and 17...Same family but not the same performance...

Sorry unknown if that carries on with the CFM56 series..

GS
Sometimes all you can do is look them in the eye and ask " how much did your mom drink when she was pregnant with you?"
 
474218
Posts: 4510
Joined: Mon Oct 10, 2005 12:27 pm

RE: Same A/c, Same Engines, Larger Cost Per Km - Why?

Thu Jan 22, 2009 1:32 am

Operating costs can very by 10% between the same aircraft type operated by the same airline. Operating cost differences of 3 to 5% quite normal . Things like flight controls rigging, leaking door seals, engine status and fuselage smoothness and gaps all effect the operating costs.
 
sunrisevalley
Posts: 4953
Joined: Tue Jul 06, 2004 3:26 am

RE: Same A/c, Same Engines, Larger Cost Per Km - Why?

Wed Jan 28, 2009 11:32 pm



Quoting 474218 (Reply 3):
Things like flight controls rigging, leaking door seals, engine status and fuselage smoothness and gaps all effect the operating costs.

plus there are weight variances between one aircraft and another, of the same model and version.
 
rivervisual
Posts: 40
Joined: Sun Jan 25, 2009 12:49 am

RE: Same A/c, Same Engines, Larger Cost Per Km - Why?

Wed Jan 28, 2009 11:58 pm

In addition, you need to consider if the cost per km includes staffing costs. Depending on the labor contracts the same aircraft/engines may have vastly different operating costs.

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