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Chip: Special Di Besten Simulation
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FUEL
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FUEL.DOC
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1992-01-11
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FUEL.EXE (c) 1991,1992 Seth Osher v1.4
=============================
Additions for V1.4:
There are now CFG files for each plane:
737.CFG 747.CFG and 767.CFG.
Major changes in the algorithm that
yield slightly Much calculations.
I think I have corrected some very nasty
errors in V1.2 that seriously over estimated
the fuel.
=============================
Corrections and Additions for V1.2:
I have improved the fuel calulations and made them
more specific to individual flying habits.
There is now a file: FUEL.CFG which contains
you desired Rate of Climb and Rate of Decent,
in that order. FUEL reads them in and uses
them in its calculations. If the file
is not present, FUEL defaults to 1500 fpm climb
and 3000 fpm decent.
=============================
Corrections and Additions for v1.1:
The error where loads over 32000 lbs were reported
incorrectly has been fixed.
FUEL now calculates optimal altitude up to 42,000 for
the 747, and 40,000 for the 767.
FUEL now compensates for the exponential decay of fuel
weight. In v1.0 calculations for long flights would
inflate fuel flow and fuel use.
-----------------------------
Notes:
Calculations are based on 1000 ft/min average climb rate,
and 1000 ft/min descent rate.
Distances are in Nautical Miles.
Fuel Flow is average, it will be higher for about the first
1/3 of the flight and lower for the remainder.
=============================
v1.0
This program is based apon the FCQV2 spreadsheets. There was
a problem with its converion to Lotus format because of Lotus's
inability to handle circular cells. This program does not
include wind compensation, but it now finds the optimal cruise
altitude between 15000 and 35000 feet.
Usage:
FUEL type dist load
"type" is the class of aircraft: 737, 747, 767, or 320.
"dist" is the distance of the flight in miles.
"load" is the planes loading (not including is own weight
or the weight of the fuel.
The program output:
Aircraft Type, Flight Disance, Aircraft Loading
Recomended Fuel, Recomended Fuelflow (per engine)
Recomended Altitude, Probable Speed
Flight Time
For example:
FUEL 737 500 10000 (737, 500 mi, 10000lbs load)
outputs
Plane: 737, Dist 500, Load 10000 737, 500 mi, 10000 lbs loading
Fuel: 14217, Flow: 2151 Recomended fuel load 14217 lbs
recomended fuelflow 2151 lbs/hr
Altitude: 35000, Speed 444 Recomended altitude 35000, Cruise
speed 444 mi/hr (ground speed).
Estimated Time: 01:42 Aproximate flight time.
The calculations are base on a climb rate of 1000 ft/minute.
It is of note that the fuel use difference between 20000 ft and
35000 ft may be only 100 lbs, but FUEL will choose 35000 lbs.
This program is realease freely to the public domain by the author.
The author is not liable for anything, implied or stated.
Seth Osher
Compuserve 73750,3133