Subject: 'Jet Belt': would that be possible?

In a site about flying contraptions there's a page showing a drawing of a 
thing that they call "jet belt"
(http://www.shreve.net/~jnuts/fly/old/jetbelt.html). My question is: would 
a "jet belt" built like that really be able to take off? I'm asking 
this because, as you can see, the air enters the turbine from down and the 
gases are ejected towards down too. Shouldn't the resulting forces be 
opposite and therefore cancel each other?

Re: 'Jet Belt': would that be possible?