This is something to check before you start taking apart your "Start-up" procedure. Check that the Right Wrist is Fully Bent by the End of the Take-away and the Left Wrist is Vertical to the Ground. Extensor Action should then take your "Assembled" Power Package on a Steeper Plane Angle assuming that you're Tracing the Plane Line.
Is your Left Shoulder rotating under your Chin?
Something that you should keep in mind, is that a Flat Backstroke Shoulder turn can be too Flat. I mean that a Flat Backstroke Shoulder Turn is Flatter than a Rotated Shoulder Turn, but not by much, and, it's possible to Turn Much Flatter than a "Flat Backstroke Shoulder Turn".
Sounds like overrating the left arm flying wedge, something Tiger is doing.
I think the extensor action and working on your plane line on the back swing will fix it, I know it has for me. I work it so that I over do it by getting it steeper as I make my slight shift to the TSP going back. I always revert a little flatter than the practice though.
I have noticed that My dirver is not getting the distance as my irons are. I see that my right forearm (right-handed hitter) is what I would call flat on the down swing and pointing past the target/ball line. Any drills to alow me to start back on the plane line when starting down. It seems that as I start my hips it causes me to over roate the shoulders, causing me to come over the top and then the right forearm is pointing past the target line.
Overrotating the left arm flying wedge is exactly what I'm doing. Results in me throwing it back over the top. Since I'm hitting I've setup with a slightly closed clubface and it's fore left baby.
Like I said the only thing I can do right now to fix it to let my right elbow "fly", if it stays in tight and low I get really flat.
Flat by itself isnt bad but off plane is. The over rolling with the left side will have the butt end of EdZ's flashlights pointing outside the plane after the club switches ends on the backswing. If your Hitting read Single Wrist Action, you dont need to roll .
If you still think your plane angle is too flat then Im guessing that you are missing the UP that EdZ alludes to, in your Right Forearm Takeaway. Which makes me wonder if you are Fanning and Bending or just sort of "sawing" an in-line deal with the Right Arm. A Push Basic type takeaway which is for short shots only. See Punch Elbow and learn to "Fan and Bend" as described in Alignment Golf 1.
I often have to remind a student in early days to "pick the Flying Wedge up rather than drag it around and up'. The flashlights will show you fast if you are maintaining or throwing the plane away. Beware those hips turning too quickly in the backswing as that too allows a flatter off plane motion.
Ask why it is turning flat and you can fix the route causes. Awareness is king of mechanics and fee.
Overrotating the left arm flying wedge is exactly what I'm doing. Results in me throwing it back over the top. Since I'm hitting I've setup with a slightly closed clubface and it's fore left baby.
Like I said the only thing I can do right now to fix it to let my right elbow "fly", if it stays in tight and low I get really flat.
Sorry for the pdf its from my files........but its a great primer on the "Swivel (s)" and written by the man who penned the name "Startup Swivel"....... which you dont need if your Hitting. See Single Wrist Action.
thanks for the responses and pdf. All great stuff. I sometimes wonder if the high hand hitter setup(due to the uncocked wrist), sometimes leads to overrolling of the left arm flying wedge. Typically an onplane takeaway has lower hands at setup.
Not that it's impossible by any stretch, something that just has to be monitored more closely.