The ultralight glider is an amazing ultralight aircraft.
Here is an airplane or aircraft of light construction that flies very well without the assistance of an engine.
It is truly a glider i.e it only has one wheel, extra long wing span and either roll launches or is towed behind a glider tow plane (or similar).
This glider operates the same as all gliders - they soar and maintain altitude by taking advantage of rising thermal air currents.
Basic Ultralight Aircraft
Basically speaking there are two types of ultralight gliders.
The first is as already mentioned (and showing in the top images) a single wheeled aircraft without an engine.
Therefore the second is an ultralight airplane with a single wheel and HAS engine assistance like the one in the image to the left.
Some of these types of gliders even have one small engine mounted on each wing. When required the propellers open from a fold down position. Check out this ultralight glider.