Gary,
You are correct, that is the blower tube. The air on this machine is actually drawn down thru the motor. The fan housing is actually on the bottom of the machine. If I get time later today I will take a picture of the bottom. It has the neatest switch, you actually step on the back side of the machine, the switch is on the bottom, it makes contact with the floor...never seen anything like it.
Very powerful as well. Good airflow, probably better than any vacuum of it's day.
Morgan