Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Sikorsky S-434 is a light turbine-powered helicopter. The S-434 is an improved development of the Schweizer S-333. The prototype S-434 first flew on 18 December 2008 at Horseheads, New York. The S-434 evolved from the S-333, and has many features developed for the MQ-8 Fire Scout. It shares its cockpit layout with the S-333, which gives the crew very good visual capacities and handling characteristics.