Hi JT, Sorry for the delay - but only just returned and have access to books.
If I get airborne at VMCG with wings level ..
which might be foolish for most Types
All figures extracted for sea level conditions.
From FCOM A319 2.2.25 min V1 = 110 kts (this must be VMCG), Vr 113, V2 120
Min V2 VMU/VMCA from 35 to 50 tons = 119.
From 3.1.20 Min control speed VMCA = 108 kts.
So why can't I be airborne at VMCG?
There are two values quoted for VMCA in the FCOM:
V2 VMU/VMCA is for the take off case and VMCA is always above VMCG.
On approach; the VAPP minimum VMCA can be lower than VMCG.
Is this where the confusion comes from?