When I see web pages like this I want to post them here. This is similar to the "Expansion Chamber" explanation in the Classic thread with the animation.
Most of us have some idea about how the 2 cycle engine works but there are always those who are young beginners or who are new to working with the 2 stroke and this could be of great benefit to them. These type of illustrations can explain much for those who are struggling to visualize thru text descriptions. Certainly an aid in learning. There are animations of many other forms of engines in the site too.
The Two Stroke Engine:
Animated Engines Two Stroke Cycle