Yesterday I completed my first full rotor blade print. It's 16.3" (414 mm) tall, using most of the available 19.3" (500mm) build height.
Here's s picture partially through the print. It's pretty tall and unsupported, which lead to some decrease in the smoothness of the print towards the top as the part likely moved around more. Overall I'm pretty happy with it, but plan to add a support to the sides, to help keep it stationary.
It took about 9 hours to print at a 0.3mm layer height.