The U.S. Army's helicopter fleet is rather large, but it's not the only service to use choppers. The Navy has been using the Sikorsky MH-60 Seahawk, a variant of the UH-60 designed specifically ...

Abstract: Generally, crowbar circuits and DC choppers are employed to prevent rotor-side converter overcurrent and DClink overvoltage, respectively, during the fault ride-through (FRT) process in ...

The rotor/stator features a patented shape for providing optimum parameters at the mixing zone. Tüfekçioğlu globally exports rubber liners, hydrocyclones, patented slurry pumps and flotation cells.

8 and 10 -- on a tour when the chopper crashed on April 10. Video showed the helicopter plunging into the 5-foot-deep water near Jersey City, New Jersey, without its tail rotor or main rotor blade.

Video from the crash showed the chopper plunging into the water without a tail rotor or a main rotor blade. Officials said it hit the water inverted. The National Transportation Safety Board is ...

8 and 10 -- on a tour when the chopper crashed on April 10. Video showed the helicopter plunging into the 5-foot-deep water near Jersey City, New Jersey, without its tail rotor or main rotor blade.

LOWER MANHATTAN (WABC) -- The main rotor and roof structure from the deadly ... The New York Helicopters chartered chopper, which was carrying a pilot, and a family visiting from Spain, fell ...

Video showed the main rotor and tail rotor detach from the chopper as it fell from the sky. The National Transportation Safety Board is investigating the incident. After an Army Corps of Engineers ...