.. but keep in mind that most jets are designed to Vmo/Mmo, rather than Vne.
This is quite true, however a few types that some might think would not qualify for a hard limit Mne, have one.
Example.
DC-7 and Lockheed 1649 Constellation.
Even the B377 type certificate was amended later on to reflect changes to the original flight test data.
Looking at a Stratocruiser one might not imagine it could be flown fast, but looks could be deceiving.
It had very large engines and pointed downhill, the acceleration was quite rapid.
