RC ducted fan jets for beginners

The "tube" of most RC ducted fans is the aircraft itself. As a matter of fact, all GDF's that I am aware of have internal ducted fans. Some EDF's have ducted fan units mounted under the wings or near the rear of the fuselage.

Other's have internal ducted fans. Take a look at the Megatech A7 Tornado RTF Jet ducted fan jet shown to the right, which has an internal ducted fan. The fan pulls air into the front of the fuselage and pushes it out of the rear, much like a full scale just.