This guy did a nice job integrating a brushless motor into a Fenestron unit in the tail of a 450 size EC135 scale helicopter.
The same guy who made the above brushless Fenestron unit made a a very cool turret gun for a "Blue Thunder" helicopter. The nose mounted gun tilts and rotates by tilting and rotating the transmitter. Check it out.
This Bergen RC? http://bergenrc.com/ If so, they need some serious help with their website, tons of broken image links. I didn't see any electric tails on that website.
Yep. Chris Bergen. At about 1 minutes he drops it and restarts. http://www.youtube.com/watch?v=H1_SW_t658M