The original production model of UH-2A was HU2K- 1, and later it was changed to UH-2A. The T58-GE-8B turboshaft engine with 932kW (1267 shaft horsepower) was installed, and the delivery began in February, 1962. The total output is 88.
Er -2B was modified from Er -2A according to the visual flight rules. The original navy number was HU2K- 1U, and later it was changed to UH-2B. 1963 began its service in August. * * * Total output 102.
UH-2C "Witch" with double hairstyle. Because the single "siren" can only complete 30% of the life-saving mission, the navy signed a contract with the company to refit two UH-2C in June1965655438+1October. UH-2C is equipped with two T58-GE-8B turboshaft engines, with a power of 932 kw( 1.267 shaft horsepower), and its high-temperature plateau performance is better than that of a single engine "Siren". The first flight tests of these two UH-2C aircraft were conducted on March 1966 and May 20, respectively.
1in August, 966, the navy decided to refit 40 UH-2C aircraft. UH-2C was delivered in August of 1967. 1967, the navy also decided to gradually convert all UH-2A and UH-2B into UH-2C. According to the requirements of the US Navy's "Light Air Multipurpose System" program, UH-2C was changed to SH-2 to provide the ship with the ability to perform anti-submarine, anti-ship surveillance and target surveillance, search and rescue and general tasks. Later, all SH-2S were converted into SH-2F, T58-GE-8F engines were installed, the rotor system was improved, and the landing gear device was strengthened.
NUH-2C is the only alarm modified by UH-2C, which can launch sparrow III and rattlesnake missiles. The purpose of the modification is to evaluate the helicopter as a missile launching platform and a test machine for carrying out the anti-ship NHH-2D circulation control rotor plan.
HH-2C standard UH-2C armed armor type, performing search and life-saving tasks. The difference between UH-2C and UH-2C is that a 7.62mm "Mini Gan" machine gun is installed under the nose, and the firing rate is 4000 rounds per minute. Two 7.62mm M60 machine guns are installed in the middle of the fuselage; Large area armor is used around key parts such as cockpit; Two VHF radio stations; Self-sealing fuel tank; A 6 1 meter-long life-saving steel cable; Increase that power of the transmission system; The main landing gear is equipped with two wheels; Four-blade tail rotor is adopted. The total weight increased to 5670 kg. The aircraft is equipped with two T58-GE-8F turboshaft engines, 1007 kW (1368 shaft horsepower).
1970, six HH-2C modified from single-engine "siren" were delivered to the navy to perform combat search and life-saving tasks on missile ships in southeast Asia. All HH-2C were later converted into SH-2.
The unarmed armor type of HH-2DHH-2C. The only difference between HH-2C and HH-2C is that it has no weapons and armor, and everything else is the same. About 70 HH-2D aircraft were modified, and 1970 was delivered to the Navy in February. 197 1 year, according to the navy's DV-98 plan, APS- 1 15 radar was installed under the nose with two HH-2D, and anti-ship missile defense tests were carried out on ships on the west coast of the United States.
Anti-submarine tests were carried out on two other HH-2D modified ships on the east coast. On 1975, HH-2D was changed to SH-2F. At the beginning of 1978, there were three HH-2D models that were not "light aviation multipurpose systems" and were used for coastal and geodetic surveys.
SH-2DHH-2D lamp is used for anti-submarine and anti-ship missile defense. 1970 10, the navy converted 10 HH-2D into SH-2D with 2 million dollars. 197 1 in March, the navy decided to convert 1 15 "siren" into SH-2D model. 197 1 The first SH-2D made its first test flight on March 6, 2006, and it entered service on February 7, 2006.
By1979,65438+1October * *, 8 squadrons were deployed, with a total of 145 SH-2D/F helicopters. The modification work of SH-2D includes: installing LN-66HP high-power surface search radar of Marconi Company in Canada under the nose; ASQ-8 1 magnetic anomaly detector on the right bracket of the fuselage; 15a /SSQ-4 1 passive sonar buoy or an /SSQ-47 active sonar buoy is launched by a small explosive device on the left side of the fuselage; Cigarette labels; Two Mk46 homing torpedoes; An /APN- 182 Doppler radar; An /APN- 17 1 radar altimeter; AN/ARR-52A sonar buoy receiver and AN/AKT-22 data transmission line; ALR-54 electronic countermeasure equipment: An /ARN-2 1 or -52 TACAN, An /APX-72 friend or foe identification; AN/ARA-25 direction finder and two sets of AN/ARC- 159 VHF communication equipment.
Lamps MKⅲⅲ of YSH-2EHH-2D was used as the testing machine. Originally, it was planned to refit 20 YSH-2Es with navy number SH-2E, but later the plan was cancelled and the lamps MKⅲIII plan was directly carried out.
The improved SH-2FSH-2D, also known as LAMPS MK Ⅰ Ⅰ, mainly performs anti-submarine and anti-ship missile defense tasks, followed by search and rescue, observation and other tasks. The modification work started at the beginning of 1973, and was delivered in May/973. 1973+0 was used in the Pacific Ocean in September. Up to now, 1982 * * 88 pieces have been delivered, and 1982- 1986 * * 54 pieces of new SH-2f (respectively 18, 18, 6, 6) have been ordered to.
1987 ordered six SH-2G "Super Siren" improved by SH-2F. SH-2F strengthened the landing gear; The tail wheel moves forward to shorten the track distance of the rear main wheel; Install two single T58-GE-8F engines with power 1007 kW (1369 axle horsepower).
Recently, LN-66HP radar has been improved, using tactical navigation system, electronic support equipment, sonar buoy system, data transmission line and other avionics equipment. 1985165438+10 The maximum total weight of SH-2F delivered in October reached 6 123kg. This is better than the standard SH rotor system with Kaman 10 1 rotor system. The rotor hub is made of titanium alloy and the rotor blades are made of all-composite materials. The blade is fixedly connected with the hub, and there is a flapping servo control device on the blade, and the pitch can be adjusted by adjusting the trailing edge of the blade.