In response to everyone's feedback, I revised the second version：

Triblade Boomerang V2 https://makerworld.com/en/models/505662

Triblade Boomerang
Simple design and easy to throw boomerang, it is very easy to throw and can achieve smooth flight.
Promotes outdoor connection and family quality time, promoting physical activity, coordination and social interaction.

How to throw a boomerang
Throw with a normal over arm style facing 45 degrees to the right of the wind (to the left if you are left handed). Aim the boomerang at a point on or just above the horizon. Throw to the right of the wind about 45 degrees (to the left if you are left handed) so that the breeze helps the boomerang come back.