Helicopter rotor

May 28, 2012 - 4:15pm

The FAA issued a second Emergency Airworthiness Directive [2012-10-53] for the Eurocopter EC135 on May 18. This EAD supercedes the earlier EAD [2012-10-51] for an inspection of the main rotor hub shaft flange for cracks.

April 5, 2012 - 4:50am

Composite Technology, a Sikorsky Aerospace Services company based at Dallas/Fort Worth Airport, has opened a $15 million structure to dynamically balance helicopter main rotor blades. It can test main rotor blades that rotate either clockwise or counterclockwise, and its two 3,000-shp, variable-frequency drive motors make it suitable for light to heavy helicopters. A test involves three blades: a precision-balanced master blade and two test blades. One blade can weigh up to 500 pounds.

March 15, 2012 - 4:10pm

The EASA has issued an emergency Airworthiness Directive (AD) calling for inspections of all Eurocopter EC135s after a crack was discovered on the lower hub-shaft flange of a main rotor hub shaft on one of the light twin-engine helicopters. In issuing the emergency order, the agency wants to avoid crack propagation, which could cause hub failure.

February 12, 2012 - 8:40pm

Honeywell plans to provide the Zing Test Elite rotor track-and-balance maintenance technology to MD Helicopters to support all current and new MD500 series helicopters. Based on the Zing HUMS 1134 on-board system, Zing Test Elite is a carry-on system that quickly provides the ability to perform helicopter rotor smoothing, engine refining performance checks, component balancing, and vibration surveys to save time, fuel and maintenance costs.

February 12, 2012 - 3:20pm

The X3 compound helicopter demonstrator is set to resume flights this month. Data analysis from the first two flight-test campaigns has prompted new questions, chief technology officer Jean-Michel Billig told AIN, and the launch of a third test campaign has been scheduled. The testing will explore the behavior of the main rotor at high speed. Some other goals relate to the Fadec and the link between rotor rpm and aircraft speed. Billing said the first product using X3 technology may appear in 2020 or 2021.

February 12, 2012 - 3:15pm

Sikorsky Innovations has completed wind-tunnel testing of an active rotor system equipped with “high-authority” flaps, thus paving the way for improvements in noise, vibration–and, marginally, efficiency–on future rotorcraft. The program, which started in 2008, is part of a broader program that encompasses leading-edge rotor blade devices. The tested system involved trailing-edge flaps and a closed-loop control.

February 12, 2012 - 7:00am

Sikorsky Innovations has completed wind-tunnel testing of an active rotor system equipped with “high-authority” flaps, thus paving the way for improvements in noise, vibration–and, marginally, efficiency–on future rotorcraft.

February 12, 2012 - 6:45am
X3 compound helicopter

The X3 compound helicopter demonstrator is to resume flights this month. Data analysis from the first two flight-test campaigns has prompted new questions, chief technology officer Jean-Michel Billig told AIN, and the launch of a third test campaign has been scheduled. The testing will explore the behavior of the main rotor at high speed. Some other goals relate to the Fadec and the link between rotor rpm and aircraft speed.

February 11, 2012 - 7:49pm

Scott’s-Bell 47 (Booth No. 5309) will launch a Model 47 upgrade program here at Heli-Expo and is also developing composite replacement main rotor blades with IAC Ltd.

The upgrade gives customers the choice of having their existing Model 47 refurbished or purchasing a completed refurbished/upgraded 47G-2A (narrow body) or 47G-2A-1 directly from Scott’s.

The program covers all Lycoming-powered 47G helicopters. Included are new main rotor blades as well as a new instrument panel, new interior and Texas Helicopter STCs, such as No-Bar, Sprag, and Muffler.

February 10, 2012 - 7:15am

Sikorsky has selected GE Aviation (Booth No. 1217) to provide the GE YT706-GE-700R engines and engineering support for Sikorsky’s S-97 Raider program. The Raider is the military version of the experimental X2, a single-engine rotorcraft with coaxial counter-rotating main rotors and a pusher propeller. The Fadec-controlled GE engine offers 2,500 to 3,000 shp and is based on the GE700/CT7 family. GE said it developed the GE3000 for medium-lift applications and this engine could be incorporated into the Raider in the future.

 
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