I have a White Lightning 1/2A plane designed for the Norvel .061that I built three or four years ago. As I posted in the 1/2A White Lightning thread, I got a hankering to re-electrify it. So I converted it yesterday with the Brodak power package I had on hand. It's the Brodak EPS-10 Sport package which is the electric package seeming about right to replace a Norvel .061 engine. It has the 1560KV 2210/25 motor on a 3S battery with their 18A esc and an APC 7x5E prop. I used an 800 mAh battery instead of the 1300 mAh suggested to save weight. I also used an RC transmitter and receiver for speed control. For attaching the prop, I used the prop saver hub that came with the Brodak motor, as I was flying on asphalt and didn't want to use a collet.
So, as I was at the handle and slowly spinning up the motor for take-off, something scary happened. At a little over half throttle, the prop saver let go and the prop went flying off. For me it wasn't so dangerous, but seeing the prop fly off a few inches in front of the person holding the plane (well, it SEEMED like a few inches from out at the center where I was standing) scared the crap out of me.
I had spun up the motor the night before when I was hooking up the motor leads for proper polarity, and it had no problem. But, being incredibly embarrassed by what had happened, I put the plane away until I could further analyze what happened. On my way home, I stopped at the hobby shop and bought some thicker o-rings for the prop saver, but I may just switch to a collet for the prop anyway. And when I got home, I fired up the computer and checked the Brodak website for the info on the EPS-10 system to make sure I hadn't made a mistake on my components. But other than the smaller battery and using a receiver instead of a timer, I had the right motor/voltage/esc/prop combination recommended by Brodak.
Scary Stuff, scary stuff. Next time I go out I'll have a couple of 2S batteries charged up and try those first, but the 3S should be right, right? And one thing's for sure. When I test fly it next week, I'll launch from a stooge instead of having a helper hold the model for take-off.
Mark