Mil V-12 - Unique Transport

By far largest chopper ever engineered, this was uncommon extrapolation of Mi-6 a decade later to match bigger fixed-wing airlift of An-22 and Il-76. Rotor revolutions per minute reduced to 112; gearboxes connected by crosswise shafting. Braced at root and tip to main landing gears with force reacted by horizontal bracing to rear body. Inner/outer trailing-edge flaps mounted in up position once flight trials. Fuel in outer wings and 2 external tanks; nonmandatory ferry tanks in cabin. mounted twin-wheel undercarriage with main tyres 1750 x 730mm, gas brakes, and manageable nose tyres 1200 x 450mm. massive stressed-skin body with crew door both sides, 3 slippery  facet doors and full-section rear clamshell doors and ramp with left/right twin-wheel ventral bumpers. heavier-than-air craft tail with fin, tabbed rudder, dihedralled horizontal stabilizer with tabbed elevators, and end organ fins mounted vertically however pointed-toe inwards.  higher deck for nav with manipulator behind. Hydraulic control with emergency manual reversion. Autopilot with three-axis autostab; mapping measuring device underneath nose. AI-8 rotary engine APU for ground power and engine begin. Main cabin twenty eight.15m long, 4.4m square. Overhead framework crane with four 1t hoists. collapsible  seats on sides (50 to 120).
 Second (21142, currently at Monino) flown by V.P.Koloshchyenko Gregorian calendar month 1969 to 2255m with payload of forty,204.5kg. NII tests completed and demos at Paris, however abandoned as a result of Mi-26 way superior.
The Mi-12 project was started in 1965 with the aim of manufacturing a vertical take-off craft capable of carrying missiles or different masses compatible with those of the four-engine An-22. The bureau selected the side-by-side rotor formula so as to use the engine-transmission-rotor assembly of the helicopters of the Mi-6 / Mi-10 series with tokenish modifications. 2 of those assemblies were really mounted at the ideas of the 2 short wings, that had associate inverse taper from the basis to the wingtips. The engines were 6500shp Soloviev D-25VF turbines giving the chopper a most speed of 260km/h, with a 35400kg load and 500km vary. the big cargo area mensuration twenty eight.15m long by four.4m wide may take numerous types of masses, as well as terribly large ones, likewise as troops or handling crews. The body had a standard, semi-monocoque structure, with massive clamshell loading doors at the rear to facilitate handling of large masses. The deck was on the higher floor of the cabin and there have been six crewmembers. On the bottom, the chopper was supported by massive, mounted wheeled vehicle undercarriage with 2 wheels on every unit. an oversized end-plate fin tail unit was mounted at the rear of the body, with moving vertical and horizontal surfaces.
The two engines square measure situated side-by-side with twin intakes, and drive five-bladed metal rotors. The left rotor rotates anti-clockwise and also the right unit clockwise; the 2 units square measure connected by crosswise shafting to confirm synchronization and also the continued  rotation of each units within the event of equipment failure at either wingtip. The lower a part of every protective cover may be born to make a operating platform for mechanics. Fuel is housed in 2 cylindrical tanks mounted outwardly on the lower body sides. the most units of the mounted wheeled vehicle framework square measure supported by a overplus of struts bracing the wings and running from the lower body, wings and engines.

Share: