At what altitude? 35K? 25K? 10K? Within 1000 feet of the surface?
LW 50:
Those are just the near end game values.
I prefer think of the 151 knots as KTS (knots true speed) as opposed to KT
AS. There probably wasn't much in the way of air involved at the approximate 60 degree AOA, even unblocked.
The 151 knot speed is a purely trigonometric calculation based on a report which furnished near end game ground speed and vertical speed. Nobody is blowing air on the trig tables. (Maybe some smoke however)
The 89 knots along the aircraft longitudinal axis would approximate a no wind a KTAS via KCAS inputs if the systems were functional to sense it, which corresponds to a fairly low KCAS down low. It could be somewhat more or less, however, depending on actual wind. The cosine of 16 degrees is .96 so its horizontal component is not reduced much.
I suspect the KCAS was higher with a headwind component in effect.
My only point was that the 151 knots was not necessarily Knots True
AIR Speed. I am not trying to offer anything remotely relating to cause.
Math is not hard…Math is not hard…Math is…