December 22, 20232 yr When Simbrief generates an OFP does it consider runway length and runway state (wet/dry) when setting a TOW as the new PMDG EFB does? Because, when setting up a flight in the PMDG 737 departing from the short NZWN 16/34 runways for 3.5 hour flights to cities on the Australian east coast, the PMDG EFB comes up with a MTOW that is way lower than the Simbrief TOW - more so if the runway is wet. Bruce Edited December 22, 20232 yr by brucewtb typo Bruce Bartlett Frodo: "I wish none of this had happened." Gandalf: "So do all who live to see such times, but that is not for them to decide. All we have to decide is what to do with the time that is given to us."
December 22, 20232 yr I don't believe the Simbrief planner considers any TOLD data limits--e.g. critical field length, tire limit speed, engine-out climb gradient, landing distance etc. I think it only checks that the required gross weight with the planned payload and required fuel load doesn't exceed MTOGW or MLW limits. As in the real world, the planner has to consider takeoff and landing performance and may find that max takeoff gross weight is further limited and adjust the load or wait for conditions to change. Bob Scott | President and CEO, AVSIM Inc ATP Gulfstream II-III-IV-V Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090 Samsung 55" JS8500 4K TV@60Hz, 3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090 Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus, TM TCA Officer Pack, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case
December 22, 20232 yr Hi Bruce, Flight Dispatch will calculate performance and for NZQN and they will use conservative assumptions in the Boeing OPT in order to provide the flight crew some wiggle room based on actual conditions. Dispatch will use plus 1 degree, minus 1mb and to the nearest 5kts lower wind from the forecast and run that in the OPT (EFB) and apply the calculated regulated take-off weight from those assumptions to the flight plan. The crew will then manage the actual, you can have 1kt of wind change at NZQN and lose 800kgs of performance. So in answer to your question, given you won’t have Boeing OPT, you will need to work backwards, go into the aircraft, calculate using the EFB your RTOW (what your take off weight can be) and then exit and flight plan using that limiting weight. Regards, Mark
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