This is a model I modified from https://grabcad.com/library/turbine-blade-m88-rafale-aube-de-turbine-de-rafale-m88-1.
I made it in to parts to make it easier to print, and also provide a better experience from those who want to learn from it.
I ended up printing one for my university professor and forgot to take pictures, but it printed great. As soon as I print another one, I'll include the pictures.
One tip: if you can, avoid using supports inside the blade, as they can be very difficult to remove. If you cannot print with the overhangs, make sure your supports are dialed in.
No supports are necessary on the root.
The author hasn't provided the model origin yet.