In this video, the creator explores the concept of an umbrella with spinning blades to repel raindrops. They initially attempt the idea but find that the blades are not spinning fast enough to keep them dry. They then modify the design with faster-spinning blades, and it successfully repels rain, essentially recreating the concept of the "air umbrella." The experiment is powered by a portable solar generator from Jackery.
Here are the key facts extracted from the text:
1. The author experimented with various umbrella ideas, including one with spinning blades to stop the rain.
2. The effectiveness of the spinning blade umbrella depends on the speed of the blades.
3. The rotational speed of the fan blades matters because they have a thickness, unlike theoretical objects.
4. The size and speed of raindrops vary, with smaller drops falling slower than larger ones.
5. The experiment used a jackery solar generator to power the spinning blade umbrella.
6. The initial test did not work as expected, with water getting through the umbrella.
7. The solution was to increase the speed of the blades and reduce their diameter.
8. The improved spinning blade umbrella successfully blocked raindrops.
9. The author realized that they had essentially recreated the concept of an "air umbrella."
10. The experiment was sponsored by Jackery, a solar generator manufacturer.
Please note that these facts are based on the provided text and do not include opinions or additional information.