MD Helicopters, Inc. (MDHI), is a leading manufacturer of commercial, military, law enforcement and air-rescue helicopters. T ... he MDHI family of rotorcraft is world renowned for its value, versatility and performance, and includes the twin-engine MD 902 Explorer, and single engine versions of the MD 600N, MD 520N, MD 500E, MD 530F, and MD 530G. The innovative NOTAR® system for anti-torque control with no tail rotor – a key feature of the MD 902, MD 600N and MD 520N – is used exclusively by MD Helicopters to provide safer, quieter and confined-area access capability. For more information about MDHI, you can also follow us on Facebook, Twitter and Instagram, or visit www.mdhelicopters.com. read more