1.Get alot of altitude
2. do a knife edge, or as the model almost stalls tip some rudder so it falls onto its side from the vertical climb
3. Give full aileron in the same direction of the rudder, which should be up if your in knife edge, and full down elevator

That should make it go, to wind it up a bit put a touch of throttle in it.

To exit

Either let go of the controls and throttle to idle
or
give opposite rudder for an inverted flat spin. Then release controls to exit the flat spin

The manuever can be done from a blender, or turned into a blender and back and forth

Does that make any sense?

You can watch my super sukhoi vid, I do a couple in that too, its on my prop site below.