เลือกภาษาไทย | | |
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Thai เลือกภาษาไทย |
 AH1 Cobra | ||
| Huey Cobra of Bell Helicopter Company was flown for the first time on 7 September 1965 . Bell 209 derived from the Model 204 which
had the powerplant , transmission and rotor of UH-1C but introduced a new fuselage, seating the gunner in the nose with the pilot behind and above the gunner. The fuselage was very
narrow only 3 feet 2 inches at the widest point . In 1966, the Department of Defence contracted with Bell Helicopter to produced and designated as AH-1G helicopters , such was the degree of urgency ,
the initial deliveries reached the US Army in June 1967.The AH-1G was in service in Veitnam and flew more than 1 million flight hours. AH-1G production totalled of more than 1100 for the US Army .
Many versions of AH-1G were introduced with one engine such as TH-1G for training , AH-1Q to fire TOW missile, AH-1R , AH-1S , AH-1P and the Modernized AH-1F which incorporated all past upgrades. The US Marine Corps decided to procure this type of helicopter with twin engines for extra reliability. US Marine corps ordered AH-1J ( Sea Cobra ). AH-1J retained basically the same airframe as the AH-1G with some detail change for higher output of the P&W T400-CP-400 (PT6T-3) Twin Pac. AH-1J were deliverd to USMC in 1974. AH-1T Improved SeaCobra retaining many feature of AH-1J but has fuselage longer for increase fuel capacity , longer tail boom , improve main and tail rotors. The first AH-1T was flown on May 1976 and delivered to USMC on October 1977. In 1986 , AH-1W Super Cobra which improved SeaCobra , has two T700-GE-401 turboshaft , a new combining gearbox and other improvements. AH-1W were delivered on March 1986. The AH-1W has upgraded avionics and improved weapons capability. These helicopters were participated in the battle of Desert Storm and destroyed more than 90 tanks. AH-1Z is the new designated for the developement of AH-1W which is now developing to four blades main rotor and six hardpoints, improved avionics and digital flight control system. The first flight was conducted in December 2000. | ||
| SPECIFICATIONS AH-1F COBRA and AH-1W SUPER COBRA | ||
| AH-1F COBRA | AH-1W SUPER COBRA | |
| Engine ( Turboshaft ) | Lycoming T53-L-703 | General Electric T700-GE-401 |
| Power | 1800 shp | 1775 shp ( Xmission rating 2082 shp) |
| Number of Engine | 1 | 2 |
| Main Rotor | 44 ft 10 in.(13.41 m.) | 48 ft (14.62 m) |
| Max.Takeoff | 10,000 lb (4,536 kg) | 14750 lb (6,696.50 kg) |
| Number of pilot | 2 | 2 |
| Length (from main rotor) | 53 ft. 1 in.(16.18 m.) | 58 ft 0 in.(17.68 m) |
| Height | 13 ft.5 in.(4.09 m.) | 14 ft 2 in.(4.32 m) |
| Speed | 123 kt (227 km/h) | 152 kt (282 km / h) |
| Range | 305 miles(507 km) | 365 miles( 587 km) |
| Ceiling | 12,200 ft | more than 14,000 ft |
| Armament | one 20 or 30 mm.cannon 8 TOW missiles on outboard hardpoints inboard hardpoints with Stinger AAM and rocket launcher |
20 mm.M 197 three-barrel cannon 4 under wing attachments 2.75 in.(70mm.) rocket-launcher pods or Hellfire anti-tank missiles |
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AH-1 Cobra Cockpit | |
| 1 nm.(nautical mile) = 1.15155 miles, 1 kt (knot) = 1.15155 mile / hr. 1 mach = 761 mph.(SL,ISA) |
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