"Jose" wrote in message
...
So, how far over redline is it "ok" to operate an aircraft, and how
arbitrary is that red line (both on the tach and the airspeed indicator)
and how is it determined?

Jose
--
Nothing takes longer than a shortcut.
for Email, make the obvious change in the address.

IIRC, civil aircraft are tested to redline + 10% during the certification
process. That doesn't mean they won't safely fly at redline +11% or more,
but they have only been tested to redline +10%...