Originally Posted by
carnival30
Hello everyone,
Please bear with me.
In our company flight plan, the format goes like this,
R/W limited t/o weight.........79.0 ( let’s say the max structural t/o is for today)
Max Ldg weight.....66.4
B/o fuel..................10.0
Ldg limited t/o weight.....76.4 (adding above two)
Max ZFW......62.7
Required fuel....13.5 (excluding taxi)
ZFW limited t/o weight....76.2 (adding above two)
planned zfw...61.0
planned t/o weight...74.5
landing weight....64.5
Now the problem I’m facing about how much extra fuel I can take for this flight. I know maximum time and easy calculation is just to subtract ldg weight from max ldg weight which gives us 66.4 minus 64.5= 1.9 tons. But in the above case we are limited by zfw limited t/o weight which is 76.2 (lowest of the three above) so should we minus this from planned t/o weight 76.2-74.5=1.7 tons. I am a bit confused here. If we take 1.9 tons then we are uplifting additional 0.2 tons here? So for the above what will be the correct answer? Thanks in advance.
THERE IS ONLY ONE WAY TO DO THIS.... Which is sorry.... THAT IS the RIGHT WAY!!
MZFW+TakeOff Fuel
MLW + Trip (Takeoff Roll to Landing Roll or Burnoff - Taxi)
MTOW
Performance Limited Takeoff weight from RTOW Charts or Software
Calculate the above four numbers --->> Choose the Smallest of Them all --->> Smallest number - ZFW + Taxi Fuel = The amount of fuel you can carry
If the amount of fuel you can carry is fixed due to destination weather or enroute weather or any other reason in that case -->> Smallest Number - Fuel + Taxi Fuel = YOUR Max Zero Wt
Period ...