Hydraulic rotation assembly and method

A hydraulic assembly comprising:

• at least one rotational member exhibiting a first center axis;
• a plurality of hydraulic chambers arrayed about a second center axis, each of said plurality of hydraulic chambers exhibiting a first end facing said second center axis, a second end opposing said first end, a wall extending from said first end to said second end and at least one opening along said wall between said first end and said second end;
• and
• a plurality of pistons, each exhibiting a first end a second end and a side extending from said first end to said second end, each of said plurality of pistons positioned within a respective one of said plurality of hydraulic chambers,
• wherein each of said plurality of pistons further comprises at least one protrusion protruding from said side of said piston, said at least one protrusion of each of said plurality of pistons extending through said at least one opening of said respective hydraulic chamber and arranged to contact said at least one rotational member such that a force is applied between said at least one rotational member and said respective piston.