small diameter three blade rotor (for old helicopter design)

Small diameter rotor that works well with the older helicopter toy design:
https://www.thingiverse.com/thing:1885007

I tested against what I found to be the better 3 and 4 blade rotor remixes for the old helicopter design and they appeared to perform similarly. This may be a little sturdier than those as these blades are thicker. This rotor will not work on the newer toy helicopter design since the gear diameter is different.

The propeller was leveraged from the Dremel Flying Fan design at:
https://www.thingiverse.com/thing:498346
but has been reversed and I reduced the weight of the outer ring and put the gear on to work with the old helicopter toy.

Enjoy!