waito
Nicely graphed, though the rounded time values on the X-axis are a bit irregular.
At the risk of stating the obvious, while the ROD (fpm) remained more-or-less constant during the descent, the flight path angle wrt the ground must have become shallower towards the end of the dive (i.e. the aircraft was beginning to pull out), since FPA is simply the resultant of horizontal and vertical velocity.
For example:
At 4000' (07:40:22) V/S 40,000 fpm (395 kts); GS 120 kts -> FPA -73°
At 2000' (07:40:25) V/S 40,000 fpm (395 kts); GS 210 kts -> FPA -62°
All values approximate, but the difference is marked enough to accommodate any slight variation.
Last edited by DaveReidUK; 11th Jan 2021 at 06:24.
Reason: calculator right way up now :-)