Originally Posted by
glendalegoon
the turbulence penetration speed is 285 kias
turbulent air penetration 285 knots or .76
it is not that close to a stall and certainly ground speed is not airspeed indicated
The Problem is that the Radar Returns will be Ground Speed. And a Ground Speed of 280kts is close to or rather is a stall at 31kft (~170kts IAS), depending on exact weight.