Fsbuild-2 Flight Planner

Hello,

I did some testflying with the Digital Aviation Fokker70 to get data for a new DAF70.prf file. The existing F70.prf file in FSBuild does not give good numbers for the DA F70, usually to high.

The climb data for 30.000kg and 36.000kg GRWT are different. The FF is nearly the same in each altitude, but the ROC is different. This results in a longer climb for the higher weight and thus more fuel.
Example:
- 36t up to FL350 -> appr. 16,5 min
- 30t up to FL350 -> appr. 12,3 min

Which data should I put in [CLIMB], the 36t, 30t or a average?
Is there a possibility to have a matrix in the [CLIMB] section similar to the [CRUISE] section?

Thanks a lot
Peter

Hi Ernie,

thanks for your info.

What I did, was climbing with A/P in ECON mode. This means, the speed is held constant according the schedule (250/280/M0.7) by changing pitch, resulting in a certain ROC. But this resulting ROC will vary with weight. The FF is nearly the same for all weights and depends only on the altitude.

My only question mow is how FSBuild is calculating the fuel burn for the climb. The [CLIMB] section in the prf file has ROC and fuelburn. Which of the parameters are taken for the calculation in the flightplan? Is the ROC?
In this case I will put lower figures in the prf file, to be on the safe side.

You are right, the 4 min difference in climb is appr. 200kg more fuelburn, so it is indeed not to much.

I also understand, that a matrix like in the cruise section makes no sense, since the FF is more or less the same.

Thanks for the insight of FSBuild calculation.

Peter

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Peter