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 McDonnell Douglas MD-500 | ||
| The Boeing (McDonnell Douglas) OH-6A Cayuse (Formerly Hughes model 369) was designed for use as a military scout during vietnam war.
The MD-500 is a light, multi-purpose helicopter that has been adapted for observation, scout, special operations, anti-armor, and anti-submarine warfare roles. On 12 February 1998, Boeing company
announced its intension to sell its commercial helicopter business and built commercial helicopter MD-500 series.The Defender is an improved military variant of model 500 with more powerful engine,
four or five blades main rotor depending on the model, T-tail, and heavier armament. This helicopter could seat five passengers in comfort. The missions include direct air support, anti-tank, reconnaisance, observation, and light utility. A single engine is mounted inside the body with air intakes on top of the cabin. The fuselage is teardrop-shaped,glassed-in cockpit and landing skids. External stores are mounted on weapons racks on each side of the fuselage. Each rack has one hard point. The tail is back-tapered with small fins attached to the tips. The rotor is mounted on the lower left of the tail boom. Variants : OH-6A Cayuse : Developed initially by the hughes Aircraft Company ( later McDonnell Douglas Helicopter Company) in mid-1960 for the US Army. Fitted with one 253 shp Allison T63-A-5A turboshaft, 4 bladed main rotor. Hughes 500M : Military export version of OH-6 in mid-1970 with upgraded to 278 shp Allison 250-C18. Modifications were also made to the rotor assembly to five blade main rotor. MD-500MD/TOW Defender : Improved military version of the model 500 with 5 blade main rotor and 375 shp Allison 250-C20B. Tow anti-tank missile pods mounted on the ends of pylons on lower aft fuselage sides.Mast-Mounted Sight (MMS) mounted above the rotor hub. MD-530MG Defender : Fitted with 650 shp. Allison 250-C30 engine (derated to 425 shp) . It has a mast mounted sight, and incorporated upgrades of all previous variants. The Variants of the 500MD have different armament configurations on detachable pylons. The scout version is armed with a 7.62 mm Minigun or Chain Gun pod, rocket pods, or 40 mm grenade launchers. The 500MD/TOW variant mounts a two-round TOW anti-tank missile launcher on each pylon. The 500MD ASW version carries one or two lightweight ASW torpedoes . | ||
| SPECIFICATIONS McDonnell Douglas MD-500 | ||
| 500MD Version | 530MG Version | |
| Engine (turboshaft) | Allision 250-C20B | Allision 250-C30 |
| Power | 420 shp (derated to 375 shp) | 650 shp (derated to 425 shp) |
| Number of Engine | 1 | 1 |
| Main Rotor (diameter) (4 or 5 blades variants) |
26 ft 4 in.(8.03 m.) | 27 ft 4 in. (8.33 m.) |
| Tail Rotor (diameter) (2 or 4 blades variants) |
1.4m. | 1.4m. |
| Max.Weight | 1,361 kg (3,000 lb) | 1,610 kg (3,550 lb) |
| Number of pilot | 2 (1 pilot + 1 co-pilot) | 2 (1 pilot + 1 co-pilot) |
| Length | 9.40 m.(30 ft 10 in.) | 9.78 m.(32 ft 1 in.) |
| Height | 2.64 m.(8 ft 8 in.) | 3.41 m.(11 ft 2.5 in.) to top of mast mounted sight |
| Cruise Speed | 119 knots(137 mph) | 135 knots(155 mph) |
| Range ( internal fuel ) | 485 km. | 430 km. |
| Fuel Capacity ( internal fuel ) | 63 us.gall(240 litr) | 63 us.gall(240 litr) |
| Armament (Option Armament) | gun pods rocket pods 40 mm.grenade launcher TOW Anti-tank missiles |
2-M134 7.62mm 6 barrel 2-M260 2.75 in. Hydra 70 rocket 2-.50 cal. 2-grenade launcher 2-TOW missiles 2-Hellfire ATGM or 2-Stinger AAM |
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Cockpit MD-500 | |
| 1 nm.(nautical mile) = 1.15155 miles, 1 kt (knot) = 1.15155 mile / hr. 1 mach = 761 mph.(SL,ISA) |
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