Speed brake always needed furing descent [VNAV]

[cmbaviator]

Hi,

I've noticed since v1.00 that during the descent with VNAV on, I always needed to extend the SB until FAF like at least 5-7 times. The wind is always blowing between 45-95kts in cruise and during the beginning of the descent. I can't recall if during all these flights, if i always had tailwind or headwind, tailwind if obviously more penalysing if wind is not taken into account. besides I was always on the high side : LW around 44.0 blocks (kg). never tested on a lighter weight.

I don't think it's an issue but more a FMC Vnav calculation limitation as it doesn't take into account the wind as we can't enter wind prediction in rte page and even if we can enter wind prediction for the descent in the forecast menu of the descent page, it don't think it takes it in account as there is no need to execute afterwards. Well fair enough I could just start the descent earlier one could say, but the issue is that DES NOW is not working, i don't know if its not yet implemented or its a bug.

I would be nice if you guyscan implement  the DES NOW button so that us VNAV nerds could start the descent earlier when there is an important TL wind component until you guys implement Wind prediction entries ( I do hope that you're planning wind prediction entries)

[Litjan]

Hi,

all of this is correct - no wind calcs yet, so you need speedbrakes in a strong tailwind situation... This WILL be fixed and also the DES NOW button.

Thanks for the report and your patience, Jan