You're going to need more than that to fly the Electricub. As I recall that's a pretty big and heavy plane. The setup you've got, you're talking maybe 150 Watts tops, and the Electricub comes out close to 3lbs IIRC.

Off the top of my head I think I'd run at least an Eflite Power .15 or equivalent motor, and a 3S 2200mAh pack. Something that puts you in the 250-300 Watt range.