AHHH you wanna go backyard flying of something.
the cells on their own can be pugged straight into the RX to power servos, but, you plug the speed controler into your main batt and it powers the whole lot, and also drops down the voltage to the Rx to 4.8V, now i would guess you've got a 5pack of AA batts, and at 6V on a 280 motor your going no where.
most indoor flyers are using packs with 1/3AA or 1/2AAA most common sizes, these packs are 7.2V and higher. 7.2 for floating, 8.4 for bit more go, 9.6 + for fun. I'm guessing you've got the geared 280, and on indoor planes here they use the 1/2AAA 270MAh Ni-cads with respectable flying times.
You might want to try the 800Mah 8.4V pack from the Hornet indoor heli, its about as heavy as you want to go and should give a good flight time.
Im afraid, your batts will make it work, but only for taxi-ing.
just not enuff voltage and way to heavy.