A relatively small axial flow fan, of 450mm diameter, is shown in this video
Shown are the following items:
The individual blades, the notches to help assembly people to fix the blades' pitch angle. Also the gap between the casing and blades is shown. This was discussed in a previous video as a major cause of inefficiency in axial fans.
The motor and motor support and the space they consume is shown. This space also has an adverse effect on fan performance.
Please use the feedback link below for comments and suggestions.