The following articles sent in by Jon Graber and Tuan:
A lucky Battery Discovery
A New Heat Engine
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Watch as expert RC hobbyist Tim McKay takes you through the RC aerodynamics basics.
Click the pics for more pics. Spot Landing Electroglide Launch of a SpaceX Rocket. Photos by Alex Sutton.
The following articles sent in by Jon Graber: SkyFly Axe Personel eVTOL SS Battery that Never Dies Silicone EV Batteries
Frank Sutton Created this meme from one of his photos of Mark.