Drag force on a flat plat like a pendulum?

Hi , please i want to know if i have flat plate (rectangle) but its fixed like pendulum (fixed from one end and free at the other end and can rotate around this fixed end) i want to know the drag force due to air on this plate?

 

[berkeman]

Hi , please i want to know if i have flat plate (rectangle) but its fixed like pendulum (fixed from one end and free at the other end and can rotate around this fixed end) i want to know the drag force due to air on this plate?

Welcome to the PF.

So far, your description is not enough to understand the setup. Can you post a sketch please? You can use the Upload button in the lower right of the window to upload PDF and JPEG files.

 

[Dr.D]

You may find something of interest in Hoerner's Fluid Dynamic Drag. It is mostly experimental results from 1930s Germany.