On Saturday, April 11, 2015 at 12:02:23 AM UTC-4, wrote:
"Its also worth mentioning that Vne is not based on load factor, like Va, but on flutter, which is why its True and not Indicated. "

Actually flutter is dependent on equivalent airspeed not true airspeed.

VD is defined based on EAS (eg FAR 23.335), and Vne is defined based on VD (23.1505).

But EAS doesn't take into account air density, which is primarily a function of altitude (and a some temp thrown in). So Vne has to be corrected for air density, which is the TAS.

--bob