CJ you auld Bu***r, thought you would have followed my lead t'other day. Go to Dogpile and type V Speed Definitions. The 5th result should give you header of Vg Diagram with faa website www1.faa.gov/fsdo/orl/files/pp/pres.ppt
This is a presentation explaining how Vg is determined and is, as I understand it, the Design Manoeuvering Speed (Va) for a specific weight and configuration. Other leads give sites which amplify Va but am sure you are up to speed (groan!)with that.
The powerpoint presentation runs automatically so you will need to right click and "reverse" in order to stop and study the diagrams. They are fairly complex but if you can't do The Telegraph crossword then you'll have little hope with these so you can always give me a call on Montag. Have a Bon w/e mon brave
