My Showtime flown at SEFF with the Hacker C50-12XL motor, 8S2P 4000mAh Thunder Power Pro Lite pack and 20x13 prop pulled around 50-52 amps, delivering about 1500 watts of power. Performance of this system in the 10.15 lb model was excellent - very good pull out from hover with steady and unlimited vertical power. It was not a rocketship like some foamies, but had better power than the glow version and more than enough for any manuever out there.

Id say at a minimum this model would fly well with 1300 watts of power. It will be able to hover with OK vertical performance at this level of power, but it might be lacking if you get into trouble down low. There are certainly a lot of motor/battery combos out there than can deliver 1300-1500watts and that should be your minimum goal. Still, I agree with Mike that the Axi 5320 or 5330 motor would be a much better choice than the lighter 4120 - for one thing youll never get the ST to balance with a lighter motor and battery than I used , but you also want have the headroom to increase power if you feel its neccessary.

While I find the power of my system to be very good right now, Im planning to try some 10S2P packs soon to push the power closer to 1700 or even 1800 watts. With this much power, vertical performance will be nothing short of spectacular

Im in the process of writing a conversion article now to be published on the Horizon Hobby web site in June/July with more tips on how to get the conversion done with as little effort as possible - keep an eye out there for more:

http://www.horizonhobby.com/Shop/ByC...ProdID=HAN2800

By the way - this airplane flies FANTASTIC! Knife edge is almost too easy and it really flies like a big 3D foamie on high rates and like a precision pattern model on low. Glow or electric (of course, electric is prefferred ) no one will be disappointed with this models performance.

Good luck!

Jason Merkle
E-flite Product Manager
Horizon Hobby
http://www.horizonhobby.com