OK, now we have a much clearer picture to work with:
Fin :race 440 Drake (This is OK, but for a 6.6 m2 fully planing on the Hypersonic, the 34 might be better/faster)
sail 6.6 North (Ok, this is a really good size for the Hypers!)
weight 82 kg (Ok, which size Hypersonic do you have 105/125/96/111/133 liters)
skill: never seems to leave beginner status
OK, now here's a real problem. The Hypersonics are not what I would consider "easy" boards to sail and they almost require some advanced skills.
I'm sure you've noticed that on the Hyper you need to manage the fore and aft trim (angle of the board to the water front to back) by shifting your weight. If you are used to uphauling a board with a longer nose, the biggest difference will be that you need to place your frint foot right in front of (touching actually) the mast foot, and your rear foot at least shoulders width (maybe more) back to get the board to float level front to back.
The Hypers are pretty stable at rest rail to rail due to the 76 cm width, but you do need to keep your weight in the right place rail to rail (across the board) to keep the deck flat. If you push down with your toes or shift your weight to leeward, the board will turn away from the wind. Conversely if you put weight on your heels or shift weight upwind, the board will turn upwind. Gotta find that critical place where the board is slightly nose high and level rail to rail, and stay there until you have some pretty good speed. Then things will get easier.
wind:8-10m/S (15.5 knots to19.4 knots should be about perfect for the Hyper with 6.6 m2 rig.)
Can you explain "rail to rail" trim and"get your weight up onto the rig"
Rail to rail "trim" is the attitude of the board away from level across the deck. When your board is level across the deck it has a 0 (zero) roll (rail to rail) axis trim. If you tip your board so the upwind rail ges down either by putting weight on your heels or shifting your weight upwind of the centerline, you now have an "upwind" roll (rail to rail) trim angle. As you roll the board more the board will tend to go upwind more.
Same applies if you lower the leeward (downind) rail. This give you a leeward (downwind) trim angle) and your board will tend to turn downwind until you flatten it back out to a 0 trim angle.
Are you using a harness yet?
Are you in the footstraps yet?
When you are in the harness on a high performance board like the Hypersonic, you need to learn to stop pulling with your arms, and "suspend" all of your body weight on the harness lines and harness hook.
This gets all your weight off the back of the board (your feet are still attached by the footstraps and doing the steering, but there's little or no weight on them) and puts all the force of the rig, plus your body weight as the counterbalance to the rig striaght down the mast to the mast foot. Your board is driven along by mast foot pressure.
Until you get hooked in and into the footstraps, none of this will make much sense.
If you are already hooked in and in the straps, then you need to move back on the board, to get the nose up and the board planing, then get all your weight on the harness to take the weight off the back of the board so it can plane more easily. You steer with your feet by controling the roll angle of your board.If you want to go upwind, push down with your rear heel and shfit your weight slightly upwind and your roll angle will change to upwind rail lowered and your board will head upwind.
Footing off to leeward is a little more difficult as you need to pull up with your front foot and the arch of your back foot at the same time you "unrake" your rig very slightly to move the CE of the sail a bit forward of the fin so the board wants to turn downwind.
Grateful for your replies
You are most welcome. We can work through these issues, but the Hyper is a very small platform and it will take alot of patience on your part.
If your board is "pearling" into the back of the chop, you aren't far enough back on the board to get the nose up to the normal (slightly nose high) pitch (front to back) trim angle. Try moving your mast foot back to the center of the slot and maybe a little behind the center of the slot and move your body back on the board as well. This should help alot with the nose "sticking" when you run down the back of a swell.
Hope this helps,