In a bubble test, air is blown in front of the spinning propeller to visualize the flow of the water. This revealed some stalling on the bi-blade and the toroidal design too, which would explain ...

A skydiver has been killed after walking into a spinning plane propeller in a "tragic" airfield accident. Amanda Gallagher, ...

A 37-year-old Kansas woman was killed after she backed into a plane's spinning propeller while trying to take photos, ...

B-BOT is a balancing robot. [Mike] used B-BOT to learn about designing with the Propeller and programming in SPIN, the Prop’s built-in interpreted language. While slower than assembler ...

Regular inspections of your wind machined are crucial for frost protection and orchard safety. Neglect can lead to costly breakdowns and dangerous failures.