The only plane I have that will do it is a Goldberg Ultimate. It will go end over end 2-3 times and then loose momentum. I do it as follows... Full throttle level pass, pull up to a 45degree climb and cut the power. I let it climb for 1-2 seconds to scrub a little bit of airspeed off. Then as fast as you can give it full down, full left aile and full right rudder. (same thing used for a flat spin or blender with an Ult) After the first tumble you can add some power. This will get the third tumble out of it most of the time. Make sure you have some alt because the plane will be dead in the air when it's done. The nose will fall over and you can add power and fly out, but you will loose about 50'. A word of caution. This is a very violent maneuver. I tore the cabane out for the top wing twice doing this with the kit version. I now have the ARF which has doubler's in that area but I still scrub some speed off first. Blenders are even harder on the airframe so be care full here two. These are not for the faint of heart with an Ultimate.
The main thing with model planes. They are so much lighter they just don't have the momentum to carry through some of these maneuvers. A full scale Extra 300 for example will go 1600 lbs or so. A 1/4 scale Extra is what? 15-20lbs? The resistance of the air is just going to stop the rotations sooner.

David