I have connected all the blades with gears.
1st I added the rotation constraint to each blade to manage synchronicity.
2nd, I had to reverse several axis rotations; this requires you to edit definition of the assembly constraint "pin" and select the group rather than individual contraints. Now you can flip the axis rotation.
The master "blade" has the axis reversed from the others. This is so they move in the same direction. I opted to drive all 5 blades from the 1st assembled blade.
I did not apply a motor. You don't really need one. But you can make a "dial" or even a "slider" feature to manage the blade angles. See the little meter tutorial. Of course, a relation at this or another level can drive this. Just connect a relation to the rotation feature in 1st blade. Or drive the 1st blade as a motor with any motor profile.
The attached file is Creo 2.0 full version.