Full Spoilers - no effect to reduce speed

[globenomaden]

Hi,

I was on an idle descent on VPATH at -1300 fps and 213 knots (see screenshot). Spoilers down to full did not have any effect of reducing the speed so far. Tried this several times on other VNAV PATH descrents an always no effect. Had to bring down the gear and Flaps 2 to reduce the speed. for me it seems there is some tuning necessery. Thanks

[Pils]

VPATH descents are not idle descents on Collins PL 21 avionics. It's following a geometric path defined as by the default descent angle, and what is required to meet any constraints, not whatever path would result in an idle thrust as is usual in commercial airliners. You may need to adjust your expectations. However, it has been acknowledged that the airframe likely needs more drag, but there's no current plan for if/when this'll be implemented.