Credit: Whisper Aero Whisper Aero has received funding to help modify a glider to flight test the startup’s ultraquiet, electric-ducted fans. Fitted with two 80-lb.-thrust eQ250 propulsors ...

Most people complain when their 3D printers start “air printing.” This is what we call it when your printer has a major clog gumming up the hotend, while the rest of the machine continues to ...