I Hope you understand my maths and reasoning here, if anyone thinks I have gone wrong let me know.
We have all seen these fuel supplements we are now being charged with, Excel is £25 per person Manchester to Dalaman return, with Thomas Cook it is £40 per person, and they both use B757's but are the recharges legit or are we being ripped off?
So I thought I would do some calculations:-
A Boeing 757-200 has a maximum fuel capacity of 43490 litres and a range of 7222Km,
Distance between Manchester and Dalaman is approx 3100Km (see
http://www.landings.com/)
Using the above figures I calculate that if the plane runs empty it is averaging 6 Litres per Kilometre, I know there would be a reserve but I haven't included that as i don't know it therefore my calculation is slightly more expensive.
So if we say each leg takes 18600 ltrs this is 37200 ltrs for the return.
At the end of April Aviation fuel was £394 per tonne, see
THIS
Jet fuel has a specific gravity between .66 and .88 so as a precuation we take the higher figure, this meansl that one tonne of fuel is equal to 1136 litres, hence the fuel for each trip 16.4 tonnes at £394 per tonne, total cost £6461.
Times the above by two for the return trip and we have £12922 for both legs.
If we now go back to the surcharge and say an average of 200 passengers are on the return flight, Excel passengers are contributing £5000 towards the fuel costs and Thomas Cook it is £8000 or 39% and 62%, reverse engineer these figures to make an increase from last year by using the following
This year fuel is £394/tonne compared to £218/tonne last year, that is an increase of 80.47%, last year both legs would have cost £7150 a difference of £5772
My conclusion, Excel have applied a surcharge that doesn't cover the total cost so they appear to be fair, however thomas Cook have used it to pass on more charges and make an extra £2228 profit, cheak or what
Dave
I think my calc is +/- 10%