From four years ago.
The following are rough calculations, and I invite people to refine the very broad data that I have used.
Let's use February data as listed above - 296 movements over 7 tonnes, 3448 below 7 tonnes - this divides nicely by 4 (yes I know it was a leap year, but good enough for now) giving: 74>7000kg and 862<7000kg.
Note movements are defined as a takeoff or landing.
Using the formula: Movements (n) * time in sec (t) /3600 *fuel burn (lt/hr) gives the total fuel for the period.
Let's start with the movements over 7 tonnes. Most are probably GLEX and GIVs. TOGA fuel burn of 1000kg/hr(?) and from start of takeoff roll to "outta there" in 30sec. On landing, 500kg/hr(?) - and 30 sec for approach and landing. That averages at 750kg/hr for 30 seconds per movement - 937lt/hr.
Sooo... 74*30/3600*937 = 577 lt per week.
Now for less than 7000kgs.
20% turboprop (172 movements @ 350lt/hr for 35 sec) = 172*35/3600*350=585lt
40% piston twin (344 movements@ 100lt/hr for 45 sec) = 344*45/3600*100=430lt
40% piston single (344 movements @ 45lt/hr for 45 sec) = 344*45/3600*45=194lt.
Total fuel burnt in the skies around EN airport in one week is 1786 litres.
Now it's 6kms from Bell St to either Airport West Westfield or Keilor Park Drive. How many trucks travelling along the freeway will burn this amount of fuel?
A semi travelling at 100km/h will burn 50lt(?)/100km. That's 3 litres to travel the 6kms.
1786/3 = 595 trucks per week. That's 87 a day. 3 per hour.
So from these rough calculations it shows that just THREE (3) trucks per hour driving along the Freeway from Bell St to Airport West will burn the same fuel as all the aircraft using EN airspace.
Then there's the rest of the trucks, all the cars and all the other streets!
Please comment and correct the assumptions I have made above...
This is a powerful statistic and needs to be refined, vetted and publicised.
Can an ATC provide a further breakdown of the AC types using EN and thier frequency?