The Airbus A400M is one of the most distinctive aircraft in the sky, and its unusual humming sound is a big reason why. Produced by the interaction of its massive counter-rotating propellers, the ...

February 27 - Cross-border fighting between Pakistan and Afghanistan intensified overnight, with both sides claiming heavy losses and the Pakistani defence minister saying his country was in an "open ...

We may receive a commission on purchases made from links. One of the biggest drawbacks of vertical blinds is their tendency to stop rotating. Before you jump right into ditching your plastic vertical ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. What is Bluetooth? – Henry, age 13, Somerville, ...

When using propeller bearings to spin blades or sails, the expected torque reaction force is not applied to the contraption. Instead of experiencing a torque reaction that would affect the contraption ...

Abstract: The counter-rotating axial-flux hybrid-excitation permanent magnet (PM) machine is a novel power device specifically designed for counter-rotating propeller (CRP) systems. Cogging torque (CT ...

When Paddington first waddles on stage during the new West End musical based on the beloved bear, the audience at the Savoy Theatre can hardly contain their excitement. Exclamations of “aww,” loud ...

The 2026 World Cup draw will be held before the field is settled in full, as December 5 gives every nation its path to the World Cup Final. The draw will be held on December 5 in Washington, DC, and ...