Elche said
VMC Minimum Control Speed
VMCA Minimum Control Airspeed Airborne (Red line speed)
From CAAP 5.23-1(2): Multi-engine aeroplane operations and training
According to FAR 23.1545 (6) Red line speed is the maximum value of Vmc
CAAP 5.23 -2(2) refers to a Vmca with no definition, or means of determining this speed.
Is Vmca a speed invented by CASA FOI's without reference to the certification speeds?
How does a test pilot determine this Vmca?