Johnston Prop Hub

Update Dec 3 2016:
This was tested this summer and it works well. it took full throttle at the dock for 5 mins. the center hole was just a bit tight and we didn't want to hammer it on, so we ran a drill bit down the center by hand (sorry don't remember the size) to scrape off just about a mm of material and then is slid right on.

I made this part as a replacement for the stock Propeller Hub sheer pin assembly. it seems that every time the sheer pin breaks it also destroys the Hub. I am unable to test the design until the spring as the motor is at the cottage for the winter. in comparing the part with the original, it measures out the same so it should work. I will update in the spring as to its success unless someone has a motor at home they can test it on and then comment.