Originally Posted by
Happydays
If the nature of the conditions change dont you call it Vmc then, and not Vmca anymore ? What does Vmc mean then ?
No.
If you look at, for example, FAR 25.149, the terms used are actually:
VMC
VMCG
VMCL
VMCL-2
The term VMCA actually doesn't occur.
In fact, the term VMCA is how people usually refer to VMC in the context of FAR 25 (for example, we state VMCA in our certification reports, yet there's really no such thing in regs, to be pedantic); bear in mind that VMCL and VMCL-2 are later additions, and so it didn't use to be necessary to clarify "which VMC"
You need to distinguish between "certification Vmcx" and "actual Vmcx" - for EACH of the minimum control speeds (a, g or l) there is a certification level and a real level. "VMC" is just a shorthand for "VMCA" and doesn't signify real versus certified.
And, as our esteemed moderate always reminds us, the real value can sometimes be HIGHER than the certified one.