Sign In
Create Account
Issue Information
-
#002732
-
Issue
-
0 - None Assigned
-
New Report
-
-
Issue Confirmations
-
Yes (0)No (0)
0
There is a problem in the fuel cost calculation.
I have two types of aircraft on my SFO-ORD route.
The 707-120 has a fuel flow of 34,720 and a fuel cost per leg of 61,760.
The DC 8-61 has a fuel flow of 35,360 and a fuel cost per leg of 57,736
Call me crazy, but I would think that the aircraft with the lower fuel flow should have the lower fuel cost.
Attached Thumbnails
The 707-120 as you use have a speed of 557mph while the DC-8-61 have a speed of 599mph.
As the DC-8-61 have less time in the air than the 707 that will cause you to burn more fuel on the 707 and making it have higher fuel cost althouhg the fuelflow is different per aircraft.
Some of the smaller engine aircraft seem to have an odd issue. Take for example the DHC-7 vs Q100 vs F-50
Aircraft Speed RT time Fuel Flow Fuel Cost
DHC-7 261 mph 3h48m 1248 $1048
Q100 273 mph 3h40m 2047 $1638
F-50 310 mph 3h18m 2246 $1582
What is the calculation? All three have 20 min turnaround times. So the actual flight time of the Q100 is 200 min, the flight time of the F-50 is 178 min. So the flight time is about 12% longer in the Q100 and the fuel flow is about 9% lower. The Q100 has a higher multiple of flight time and flue flow. However, the DHC-7 has four engines, and lower fuel flow. Is it reasonable to think the overall fuel flow on a 4 engine aircraft is less than a 2 engine aircraft?
0 user(s) are reading this issue
0 members, 0 guests, 0 anonymous users
