folding propeller

I bring to your attention a folding propeller. Based on a good propeller https://www.thingiverse.com/thing:3325659. After manufacturing, I measured the thrust and current consumption of the motor on a makeshift stand. Later, I became interested in trying the same blades but in the amount of three pieces. I made a hub for them with 3 blades, it is almost the same size, maybe one or two mm more. Central hole with a diameter of 5 mm. Information about the results of measurements can be found in the attached videos. I printed all the details on a photopolymer printer. The resin was not the usual "model" but the so-called "engineering". It is more expensive, but products made from it are more pasty and not fragile. As the axes of the blade, I took an empty ballpoint pen. Its diameter is 3 mm. Might have to go through with a drill. It all depends on your printing conditions. It is important to find a balance in exposure time. If you overdo it, the thicker ones will come out thicker than nece