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 McDonnell Douglas MD-900 Explorer | ||
| The Boeing (McDonnell Douglas) MD Explorer / MD-900 is the first commercial helicopter totally designed using computer aided design
technique. The Explorer has been built largely from composite materials and is powered by twin Pratt & Whitney PW 206A turboshaft. The helicopter incorporates the NOTAR yaw control system, bearingless main rotor,
Digital avionics including FADEC . The Liquid Crystal Integrated Instrument Display System with two six inches screens. The MD-900 Explorer was certified and first deliveries were made in December 1994. The Company phased out production of the MD-900 Explorer in 1997 as it transition to new Model MD-902 Explorer. The MD-902 Explorer applies the latest airframe and engine technologies available at that time. McDonnell Douglas has introduced an advance version of its eight-place, twin-turbine MD-900 Explorer helicopter to be known as MD-902 Explorer. The new version of Explorer acheived air speeds up to 137 kt, range up to 312 nautical miles and endurance of 3.34 hrs. The MD-902 Explorer (now simply called the MD Explorer) was announced in September 1996 as an enhanced version of the MD-900, incorporates; * More powerful PW 206E engine * Upgraded transmission * Improved integrated instrument display system software * Additional fire protection in the upper deck engine compartment * New fuel system. * Improved engine air inlet * Improved NOTAR inlet design and more stabilizer control system. NOTAR removes the risks of a tail rotor stike, not only in a narrow landing zone, but also in maintenance area when the personnel working around the helicopter. NOTAR boom act as an airfoil , the fan inside the tailboom turn ,forcing high volume low pressure air through slots along the boom to create low pressure lifting forces on the right side. This naturally counteracts 70% of the main rotor torque. the remaining 30% of anti-torque thrust needed in a hover is provided by the rotating direct jet thruster at the end of tailboom. NOTAR is the saftest available option for providing anti-torque, it also requires less maintenance. | ||
| SPECIFICATIONS McDonnell Douglas MD-900 / 902 Explorer | ||
| MD-900 Explorer Version | MD-902 Explorer Version | |
| Engine (turboshaft) | Pratt & Whitney PW 206 A or Turbomeca TM319-2 Arrius 2C |
Pratt & Whitney PW 206 E |
| Power | 464 kW for PW 206A 478 kW for turbomeca TM 319-2 |
545 kW for PW 206E |
| Number of Engine | 2 | 2 |
| Main Rotor Five Blades (diameter) | 10.34 m. | 10.34 m. |
| Max.Weight | 2,722 kg. | 2,835 kg. |
| Empty Weight | 1,481 kg. | 1,543 kg. |
| Number of pilot | 1 | 1 |
| Number of passengers | 7 | 7 |
| Length | 10 m. | 9.86 m. |
| Height | 3.66 m. | 3.66 m. |
| Cruise Speed | 274 km/h | 252 km/h |
| Range ( internal fuel ) | 630 km. | 546 km. |
| Fuel Capacity ( internal fuel ) | 600 litr | 489 kg |
| Armament (Combat version) | Reconnaissance, Utility Missions | Chin-mounted FLIR Low-light TV Sensor |
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Cockpit MD-900 Explorer | |
| 1 nm.(nautical mile) = 1.15155 miles, 1 kt (knot) = 1.15155 mile / hr. 1 mach = 761 mph.(SL,ISA) |
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