Not What You Think Official on MSN

Helicopters don’t need engines to stay in the air. Here’s the science.

A powerless helicopter doesn’t drop—it autorotates, gliding like a maple seed. This breakdown explains how that works, why ...
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RC hovercraft from a cheap RC airplane

We will make an rc hovercraft from an rc airplane for about 25$. Very easy to make. In this video, we will make a hovercraft for water, just like a boat, using simple material like two bottles of ...