Here is the tutorial for creating a simple version of the power shoulders sleeve as I've done for the Striped Jacket project. I hope you find it useful. Please feel free to ask questions if anything is not clear.
Once the sleeve patern has been drafted you can then cut out you jacket or top pattern or choice.
To construct the sleeve line up the edges corresponding to the blue and green lines on the block above and stich together. Be sure to sew a pointed end at the 'V'. Do this for both sides.
Stich the tops together (corresponding to the orange lines). You will then end up with a regular sleeve curve to be inserted into the armhole.
Remember this pattern will work best on fabric of medium to heavy weight. Also dont forget to press the seams as you go along.
Don't forget to share your success with me if you try it out!
Plain Sleeve drawing obtained from http://sewmanyseams.blogspot.com/2012/01/tulip-sleeve-tutorial.html