Most .40 size glow trainers will not spin at all. They merely spiral when you give full elevator, and full right rudder and right aileron. The surfaces are not big enough (esp the rudder) and the thing is just too stable. I did have a trainer 20 years ago called a "RCM 40". You can still see them today. I increased the rudder and elevator throw to an extreme setting to try to make it spin. It went in to a flat spin and I could not recover. I was a newbie at the time and when I neutralized the controls it continued to spin in to the ground. Now I know that I should have tried some opposite rudder and power, but at the time, I just froze and watched it fall to the ground.