Watch a seamless cycle of takeoff, underwater cruise, and skyward reemergence in this student-built hybrid drone.

(Web Desk) - Students have built a hybrid drone that can seamlessly transition from flying in the air to swimming in water.

Moreover, the overall angle of the propeller changes mid-flight in variable-pitch designs, increasing or decreasing the angle at which the blades hit the air, known as the propeller's angle of attack.

Defining pitch in toroidal propellers is quite complex due to the curved shape of the blade and the non-linear relation between blade angle and performance. The toroidal propellers reduce the noise in ...

Choosing the Right Prop Tempest Plus $610.30 Stainless steel, three blade, 14 5/8″ x 17″ Top Speed/Light: 45.9 mph @ 5,779 rpm Top Speed/Heavy: 43.5 mph @ 5,534 rpm 0-to-20 mph/Light: 3.8 seconds 0-to ...

Mercury Racing has expanded the pitch range of its popular Revolution® 4 XP propeller line, investing in a new base casting that will be used to produce this high‑performance prop in a 15‑inch ...

The five-bladed controllable pitch propeller on the Maunalei showing a fracture (inset) at the base of the no. 4 blade. (Source: U.S. Coast Guard) ...