Hitting it thin will get you a low tragectory with little spin, great for in the wind as you saw. But repeating it is as you expect, a fluke at best. To recreate this "type" of shot is done by:

* placing the ball back in the stance slightly (your 3W about in the middle of your stance)
* shortening your takeaway slightly. This shallows your angle of attack on the ball, hitting it lower.
* not releasing your hands at the ball as aggressivly, being smooth with a release will also reduce the angle of attack and reduces the spin on the ball.

Long bunker shots are not necessarily the same solution. The real solution to getting a long shots out of the bunker:

* Assess your lie. If it is good, then you have some good options. Otherwise, take your lumps and get it out with your SW.
* Assess the hight you get to play the shot out and not hit the front lip. Then take 1 less club (a 7I, not the 6I you think will get you out).
* Play the ball back slightly in your stance. This is the only thing that is similar to the "in-the-wind" shot. This makes it easier to hit the ball first and not the sand behind the ball causing massive decelaration at impact. (Remember we used 1 less club because we are putting the ball in our stance back slightly causing a lower tragectory)
* Put a little more weight on the front foot at address. This helps you not sway back and stay back...again helping you hit the ball first.
* Aim slightly left (for right handers), your ball tends to want to slice a little when you are doing all these things to be sure the ball is hit first.
* Now finally, your release. Release normal for the shot you want to play. Hard and late for high shots, smooth for lower in-the-wind shots.

As for maximum power:

The hands should not be used to gain more clubhead speed. This is done correctly using the body rotation (legs, hips, then shoulders). The arms and hands work to get you the shape and type of shot you want to produce. Any time you feel the need to hit the ball harder with the hands, your error rate increased dramitically. Use the big muscles for power and the small ones for accuracy and control.