Plane Speeds Were Not Possible.....Only A Fiction

[Carsten Wiethoff]

Maximum operating velocity of 360 knots??? That’s only 414 mph. Economical cruising speed is 461 kts, far above your figure of 360.

The maximum operating speed (Vmo) of any Boeing 767 is 360 knots indicated airspeed. That is the speed, at which the overspeed warning in the cockpit goes on. At ground level, indicated airspeed is equal to true airspeed.
At higher altitudes Vmo is Mach 0.86. At, say 35000 feet, Vmo is only 295 knots indicated airspeed, but because of less air density this translates to
a much higher true airspeed.
So Peter's quote was exactly correct.

If you need a reference, try the type certificate: http://rgl.faa.gov/Regulatory_and_Guidan...E/A1NM.pdf