the conventional pod and boom configuration, with a tail rotor. The main rotor head has elastomeric bearings and the main rotor blades are made from composite materials. The tail rotor is designed on a biplane configuration, with independently controlled X-shaped blades. A new design of all-plastic rotor blades, which can sustain 30 mm shells, is installed on the Mi-28N night attack variant. It is equipped with two heavily armored cockpits, a windshield able to withstand 12.7–14.5 mm caliber bullets, in-nose electronics, and a narrow-X tail rotor (55 deg), with reduced noise characteristics. It is powered by two 2,200 hp Isotov TV-3-117VM (t/n 014) turboshaft engines. While the Mi-28 is not intended for use as a transport, it does have a small passenger compartment capable of carrying three people. The planned purpose of this is the rescue of downed helicopter crews. The Mi-28N features a helmet mounted display for the pilot. The pilot designates targets for the navigator/weapons officer, who proceeds to fire the weapons required to fulfill that particular task. The integrated surveillance and fire control system has two optical channels providing wide and narrow fields of view, a narrow-field-of-view optical television channel, and laser rangefinder. The system can move within 110 degrees in azimuth and from +13 to −40 degrees in elevation. The night attack variant helicopter retains most of the structural design of the original Mi-28. The main difference is the installation of an integrated electronic combat system. Other modifications include: new main gearbox for transmitting higher power to the rotor, new high-efficiency blades with swept-shaped tips, and an engine fuel injection control. The pilot uses a helmet-mounted target designator, which allocates the target to the navigator's surveillance and fire control system. The navigator/weapons officer is then able to employ guided weapons or guns against the target. The targeting system follows the direction of the pilot's eyes. Russia's military rotary-wing aircraft fleet has been fully refitted with new night vision goggles (NVG). Mil Mi-28N attack helicopters of the Russian Aerospace Forces (VKS) received GEO-ONV1-family NVGs. Armament The Mi-28 is equipped with a chin-mounted NPPU-28 turret with 30 mm automatic Shipunov 2A42 autocannon. It has selective fire, and a dual-feed, which allows for a cyclic rate of fire between 200 and 800 rounds per minute. Its effective range varies from 1,500 meters for ground vehicles to 2,500 meters for airborne targets. Rounds from High Explosive Incendiary (HEI) to Armour-Piercing