Unfortunately, flipping isn't defined in the TGM definitions section. If it were, I guess it would be someting like: "Loss of lag pressure prior to impact due to a bent left wrist".
However
There are several relatives to this swing fault, that may or may not share both of the conditions. For instance:
The "false flip" A left wrist that is bent at address, impact and throughout the back swing, but where there is still lag pressure. As long as the shaft end of the club is pointing ahead of the swing center. Not the left shoulder, but the real swing center. This is a "good" partner to the swiveling that Daryl mentioned. In all other respects than the clubshaft being inline with the left arm, one could say that the left wrist is geometrically flat. I played with a bent left wrist for some two years. I used a weak grip and had the fastest acc#2 release I've ever had. The 5 iron went at least as long as today, only with the height of a full 9 iron. I hit everything high and with a slight draw. I could hold a cement green with the long irons and a pinnacle ball with that swing. I could hit a 1 iron out of light rough. But it was high mentenance and one spring when I took out the clubs it was gone.
The "punch flip". A left wrist that is still arched or flat at impact, but in a process of bending. There will still be lag pressure. One cold argue that this flip will work as a 5th accumulator, but there will be an unbalance in the rhythm that must be negotiated. I push hard on pp#1 & pp#3 through impact. If I don't keep the left side moving I get this kind of flip. There's still a lot of lag pressure, but the divot is deep and sometimes there isn't plenty of lag pressure
THe "break down" flip: A bent left wrist due to a vertical or angled hinge action in the hands. This is possibly the worst of them all and the one I suspect that Homer struggled with when he started golf. I certainly know I was fighting it for the first years as a golfer. But the mother of the power leak is that the whole left side gets disconnected and the "rope" gets loose.
The "swivel flip". (the one that Daryl brought forward) I associate that with a pure swing where you freewheel through the ball and sweep the grass. It can still produce good distance and decent result even though there is less lag pressure, less spin and a less penetrating ball flight.
PS Daryl,
I'm wondering whether the "swivel flip" pattern you talk about is the same animal that is being criticised in a few other fora as being the TGM swing.
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