APC electric prop use

I had an electric prop drop all its 3 blades on a 020 TeeDee. It happened mid-air so luckily no harm was caused. Poor 020 unloaded into a high pich 30k+ run before it gulped all fuel. With a 049 on the ground it could have ended with serious bodily harm.

Brad aka 1/2A Nut uses bulls eye hub electric props chopping some of the blade length and airfoil core width by sanding, and cranks his TeeDees above 30k with no problem.

Since my experience with the 020 throwing the blades, I avoid using electric props, though.

I have used the APC Thin Electric Prop on my Cox Texaco Engine using 5% nitro.
The engine runs at about 4,000 RPMs.
It's not a screamer like any of the Tee Dee or Bee engines.

Slower rpm with a good size prop for endurance engine run.
I did try the APC 8x4 Slowfly prop and on the 4th run it broke in two the air, just a little after launch.

The hub on the slowfly was a little weak to start off with.
I copied what the guy that usually wins the duration event with the setup he uses.

Just one thing to remember, if you think that you hit the prop with the ground with that electric prop at any time, change it!
It's not worth injuring yourself and others around you!

All my other engines I use only props for combustion engines.