Subject: Why does a glider with a straw body and paper wings that form loops fly?

I am working with teachers on an inquiry activity in which we are 
constructing gliders made of a straw with two paper loops (instead of 
the paper sticking out to form wings, it is taped to make loops). We 
will work with varying sizes of loops, small on the front, larger in 
the back, etc. during our investigations.  I cannot find the 'physics' 
behind this glider, though.  I call it the 'Wingless Wonder'.  I 
suspect some type of Bernoulli effect, but would like more specific 
information.  Thanks for your help!

Re: Why does a glider with a straw body and paper wings that form loops fly?