SimBrief and fuel

[paul]

Has anyone done a long-ish flight and found Simbrief to be accurate? I've been truing to do EMA-LUZ and I just can't get anywhere near the fuel burn SB is predicting. It was so far off the other day I was predicted to be about a tonne below the ZFW of the aircraft on arrival!

[jireland246]

Nah it's super super inaccurate. Pretty much unusable. I've got my own excel fuel calc that works quite nicely. Easy to build on excel.

Assume climb GPH of 140, cruise GPH of 100, climb speed of 1600fpm, cruise speed of 260, and then I add a 60 minute fixed time regardless of flight (works out at 100 gallons). 5% variable fuel based on route distance (probs a bit low but :shrug:).

Just about to set off on a 1000Nm flight from LSZH-EGPE. Simbrief says I need 1100kg, my fuel calc 1600kg.

[qqwertzde]

I am using FSCaptain, which works really well.

Peter

[ccmh15]

I'm currently working on the performance data tables for the KA350i to be used within SimBrief, see here.

Unfortunately, as there are only very few cruise and zero climb charts available, I have to do a lot of test flights, and this will take a while.

Chris

[ccmh15]

So, it took a bit longer than expected, but finally the first draft of my performance data file for the MVKA is implemented into SimBrief.
It is now available for everyone to test (Airframe "B350 - KING AIR 350"). So far, only Best Rate Climb and Max Speed Cruise is available (rest will follow).

I just did a quick 90 minutes checkflight with 13.000 lbs TOW and near ISA, and the actual values are really close to the ones on the SimBrief OFP!

Open Items:

• Add additional profiles for High Speed Climb
• Add additional profiles for Normal Cruise and Long Range Cruise
• The calculated weights are not yet quite right
• TAS calculation still seems a bit too high
• Implement ISA correction data

To all SimBrief users here, please give it a try and report your results/suggestions/observed errors here.
Special thanks to Rodolfo for sharing a copy of the performance tables!

Cheers!
Chris

[RudiJG1]

Thanks, Chris. I'll be sure to try this out.