Here's a simple one I built about 9 years ago.
It's about as simple as it comes for this type of prop.
One 18 inch throw air cylinder and a 5 RPM to turn the handle
Have to remember 9 to 10 years ago most people still had dial up internet and a video was a huge file so you will have to make due with the small GIF to see it in action
The top is raised by the head of the prop and gravity lowers it
Build the box run a 2x4 from side to side drill a hole in the center and put your cylinder through the hole