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Weight calculation

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EHM-1001 Robert:
Hi folks,

maybe some of you can answer this question. You may know, that inside the CFG file the maximum allowed weight of the aircraft (MTOW), and the empty weights are defined exactly in pounds. Next to it, the usual payload is defined, and you can set your amount of fuel when creating a flight.

Anybody knows about weight calculations? If the payload, and fuel load is over the MTOW weight, will the game reduce the payload automatically, and keep the fuel, or let the bird just fly overweighted? And if it cuts the payload, does it reduce all the "station-load" loads equally, or simply remove some of them? Or randomly reduce the given loads as local maximums?

It would be important to know for calculating the center of gravity, and tuning the fuel flow > adjusting the range of the aircraft...

Thanks.

EHM-0695 Scott:
FS does not adjust the load automatically. How much and where you put the weight, FS simulates it. If the FDE of the aircraft is balanced correctly, an overweight aircraft will not lift off (not enough power)... If it is out of CoG limits, the aircraft may not pitch easily or too easily causing erratic control movements.

EHM-0962 Zhen Yi:
Either it will not lift off or will lift off after lots of straining

EHM-1001 Robert:
I had strange results with manipulating the loads. I think, the plane was overweighted, but could take off within the range of specs.

Then the autopilot could not keep it on a given altitude. I could "hit" the resonance of the autopilot quite easily, which resulted an oscillation between +6000...-6000 fpm. ;D The strange was, that say, on FL100 it happened, but not on FL60, or FL50... :o

EHM-0962 Zhen Yi:
Well, could it be that when the plane reaches a certain altitude, the air gets thinner and hence provides less overall lift at the same speed. Hence, a higher speed is required to keep the aircraft afloat at these speeds, which could not be provided by the engines due to the overweight problems. Hence with insufficient lift and slightly changing air conditions, the airplane may suddenly experience a mini stall and dive down only to gain speed and have the autopilot force it to climb again.......not sure if this makes sense or even apply in the world of FS :P

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