Many readers will be familiar with the Dyson Air Multiplier, an ingenious bladeless fan design in which a compressor pushes jets of air from the inside edge of a large ring. This fast-moving air ...

The Shark TurboBlade can blast out blades of cool air in any direction, but it's its breeze-inspired mode that really won me ...

This was a result of the time required for the exhaust-driven turbo to "spool up" to the speed required to push the compressed fuel-air mixture into the cylinders. The power would typically kick ...