Practice and steps of self-made aircraft propeller

The specific steps of self-made airplane propeller are as follows:

1. First, draw a picture on a beech with a predetermined thickness to determine the central hole.

2. You can drill 8 central holes at a time. This template is 2.5mm, you are too lazy to move.

3. Second, polish off the unnecessary part, the black line in the picture. Get the picture below.

4. Polishing the shadow part.

5. It must be a right angle.

6. Set the pitch, draw a line and remove the extra parts.

7. This has been done.