Less passengers - less fuel usage? It is out of real live . Co-pilot of small airplanes or a navigator of big airplanes or computer's system of despature service counting usage fuel by special tabs or program based on distance , flight level , time of flight , location of alternate airport but not by an amount of passengers .An amount of passengers could be changed a last moment before departure when aircraft is refueled already...
yes, it is supposed to go that way.
fewer Pax also change the needed runway distance and a/c range as well.
I think Sami knows how it goes in real life ;)
Of course less amount of passengers making an aircraft lighter but it is not really changing the usage : most changes happens depends flight level and time of flight and type of engine...
Quote from: alex11369 on April 23, 2010, 04:57:17 PM
Of course less amount of passengers making an aircraft lighter but it is not really changing the usage : most changes happens depends flight level and time of flight and type of engine...
Also, a part of the FMGC allows the pilot to set an economy rating to the flight. On a scale from 00 to 100, the plane knows whether it should sip or chug avgas.
Quote from: alex11369 on April 23, 2010, 04:57:17 PM
Of course less amount of passengers making an aircraft lighter but it is not really changing the usage
Most certainly it does: Less pax = less weight = less fuel. Differences in aircraft weight vs. fuel usage are significant on large jets, on smaller planes / props that cruise lower it is not that significant (that's modeled too).
And in reality passengers do not really increase in that sense after the fuelling has been decided, as that's done 1-1,5h before the dep... (unless there's something very abnormal, but haven't had such occurrence ever in my 7 year career that we'd need to refuel more because of suddenly increased payload after the plane is already fuelled)
(and to add, the flight levels, distance, engines and such stuff have been modeled in AWS since version 0.1 ;) )
Yes it is truth...