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IEEE Spectrum September 2010 Lawrence & Jenney	The Fastest Helicopter on Earth Sikorsky aims to break the helicopter speed record
Popular Mechanics November 2009 Logan Ward	10 Most Brilliant Innovators of 2009: X2 Coaxial Rotor Helicopter Innovation promises a brighter future. Here is a look at 10 of this year's brilliant innovators and their inventions.
Fast Company October 2009 Tim McKeough	Sikorsky's X2 Technology Doubles Chopper Speed The typical helicopter today chugs along at a respectable 150 miles per hour. With its aptly named X2 Technology, chopper maker Sikorsky hopes to have new helicopters flying nearly twice as fast.
Popular Mechanics September 2001 Paul Weissler	Servicing Brake Discs The brakes definitely don't feel right. The brake pedal has had this kind of vibration for a couple of weeks, but only at low speeds. Now it feels like you're stepping on a running chain saw, and the front wheels don't want to go where you want them to...