This folding propeller always folds out in reverse, but when gear is put in forward you never know if the propeller will work or not. As you can see in the last sequence it doesn't fold out even with high rev. A bit scary when you need the power when docking/undocking. It is an old propeller but there are no resistance when moving the blades by hand. Can't see any reason for this random behavior.
![](https://i.ytimg.com/vi/IpGoG3P5AKg/mqdefault.jpg)