Why are the rear window glass of the car two?

[China Glass Net] Q: Why is the window glass of the back door designed to be two pieces? Why are some windows on the back door not fully discharged?

A: The shape of the rear door is very different from that of the front door. This determines the limited space inside the rear door to accommodate the window glass. Designing the rear door window glass into two pieces is a compromise solution to realize the rear door window. Can be raised and lowered.

Let us take the following example as an example:

First of all, if you let everyone close their eyes and imagine what the shape of the front and rear doors are, what is the difference? Can you think of it before?

In order to see more clearly, I marked the outlines of the front and back doors in red and blue respectively.

Please see the picture below:

Front door:

back door:

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