Helicopter

April 1, 2013 - 12:30am
Air blown through small holes in the blade makes dynamic stall less severe in demanding maneuvers, according to researchers at DLR.

Researchers at the German Aerospace Center (DLR) in Göttingen may have discovered a way to make helicopters more maneuverable, by reducing the dynamic load on the rotor head control rods.

During rapid forward flight or maneuvering, airflow stalls on the main rotor blade as it retreats (moves backwards), giving rise to a “dynamic stall” and subjecting the rotor head control rods to formidable dynamic loads.

March 28, 2013 - 3:00pm

Russian Helicopters experienced a 10.7-percent increase in helicopter deliveries last year, shipping 28 more than in 2011, the Moscow-based company announced today. “Last year, we delivered 290 helicopters of nine different types to our clients from 19 countries,” CEO Dmitry Petrov said.

March 28, 2013 - 2:45pm

Eurocopter Japan has delivered to Japan’s Fire and Disaster Management Agency a Eurocopter AS365N3 Dauphin medium-twin helicopter retrofitted with a high-speed, real-time satellite transmission system. The helicopter’s satellite communication system enables direct transmission to relay satellites, without interruption by the helicopter’s moving rotor blades. Mitsubishi Electric developed the system, which solves these interference issues when ground-based networks are unavailable.

March 27, 2013 - 12:40pm

The FAA has adopted a new Airworthiness Directive (AD) for all AgustaWestland A109, A109A, A109A II, A109C, A109K2, A109E, A109S and A119 helicopters. It was prompted by the failure of the tail rotor pitch control link assembly on an A109E, caused by a production defect. The AD requires inspecting the link assembly for freedom of movement and taking corrective action if rotation resistance or binding occurs.

March 25, 2013 - 1:30pm

The International Helicopter Safety Team (IHST) says it’s time to develop a team focused solely on helicopter safety in the U.S. The new team will be co-chaired by the Bristow Group’s Bill Chiles, representing industry, while James Viola from the FAA’s Flight Standards Division heads the government contingent. Even though the number of civil helicopter accidents has declined over the past six years, that decline has recently leveled off.

March 21, 2013 - 2:55pm

Russian Helicopters delivered two Mi-171 medium-twin helicopters to Siberian operator Skol Airline. They are fitted with special lifting and transport equipment, including an on-board boom and winch able to lift loads of 330 pounds and an external hoist rated for 8,800 pounds. The new helicopters will “help Skol strengthen its position in the international air-freight market,” it said.

March 20, 2013 - 2:10pm

Gardner Aviation Services is offering a general aviation fixed-wing and rotorcraft product support catalog that features avionics, instruments and pilot supplies, including the latest in digital displays, communications and ADS-B technologies. The new catalog serves as a buyer’s guide for selecting equipment designed for both fixed- and rotary-wing aircraft. Product photos and descriptions identify hundreds of items and their function.

March 19, 2013 - 3:28pm

Two gunmen attempted a daring daylight helicopter prison break from a maximum-security prison in Saint-Jerome, Quebec, on Sunday.

The Robinson R44 Raven I, owned by Heli-Tremblant and operated by Quebec Helicopters, was hijacked by two gunmen during a sightseeing flight shortly after 2 p.m. Sunday and directed to fly to the prison. There, a rope line was lowered for the escapees, who were then flown to a getaway car near Mont-Tremblant, where the helicopter and pilot were located by police.

March 19, 2013 - 3:15pm

Sikorsky disclosed its 2012 performance last week, and it appears the U.S. helicopter manufacturer has a $2.2 billion backlog for commercial helicopters. The released charts lack precision, but AIN estimates civil sales totaled approximately $800 million last year and are forecast to increase to around $1.3 billion this year. A major geographical shift is under way, as developing markets are seen accounting for approximately half of Sikorsky’s civil helicopter deliveries in 2020.

March 11, 2013 - 12:15pm

Helicopter pilots unexpectedly straying into IFR conditions and losing control of their aircraft has been identified as the cause of the greatest number of rotorcraft fatalities, according to the International Helicopter Safety Team (IHST). The group, which is focused on greatly reducing helicopter accidents by 2016, has reported that NTSB figures from 2011 indicate that 45 of 52 such accidents proved fatal to occupants. “That means the chances of surviving an inadvertent encounter with IFR are just 14 percent,” according to IHST.

 
X