fuel burn rule of thumb

[hawkesmikey]

afternoon, i'm looking for rule of thumb fuel burns for;

b727-100 super27
b757-200
b767-200er


already have bbj, looking for first hour, second hour, and whatever is left of the flight burns, in lbs please. we have just got a new flight planning system and I need to check the figures are close, as we have had some problems in the past.

[Henry VIII]

762
Average 5000 Kg/hrs on a long range flight.

[hawkfinder]

Hi, are you the same Michael Hawkes that is living in Austria that is the son of Captain Ian Hawkes?

[DutchOne]

hahaha. :D

[oceancrosser]

B757-200 up to 3-4 hrs legs 3400 kgs / 7500 lbs
7-8 hrs legs 3700 kgs / 8100 lbs with about 80% payld