You can flat spin it.

Any plane can be flat spun.

All you need to do is move the CG back, increase the elevator throw, and increase the rudder throw. The CG is the most critical. Move it back, back, WAAAAY back. And it WILL flat spin. Oh, adding a little ballast seems to help as well.

I have a trainer (Hobico Airvista) that will do wonderful flat spins. In fact, it spins better than my Funtana, which really doesn't want to flat spin due to the freakish airfoil it has. The trainer wouldn't spin until I added about 2oz of lead to the tail, moved the battery back, and increased the elevator throw.

Also, with trainers, the spin entry is a bit harder than most planes, since the light wingloading and airfoil design is such that the wing doesn't stall for long, if there is any apparently forward speed, the wing just won't stall. So, to spin the trainer, I'd pull in to a 45degree climb, pull the power back, and hold the nose up in the climb until the plane *STOPS*, then hold full up elevator, full left rudder and NO aileron. A quick blip of power will help the yaw on some planes, and enter the spin faster. Then I slowly feed in right aileron.

The exact technique varies with the plane a bit. On my trainer, the downthrust built in was such that too much power resulted in no spin, becaue the engine pulled the nose down and out of the stall. But it spun beter a couple of clicks above idle. So full-power flat spins were not possible. If I removed the downthrust, that would probably change.