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Chủ đề trong 'Kỹ thuật quân sự nước ngoài' bởi ov10, 21/03/2006.

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  1. ov10

    ov10 Thành viên rất tích cực

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  2. highrisebuilding

    highrisebuilding Thành viên mới

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    Hehe...cám ơn ov10 nhé. Thực sự mình rất thích Huey, và nó chỉ là một model thôi. Cám ơn bạn đã giúp mình có thêm tư liệu để hoàn thành chiếc UH-1D của mình.
  3. ov10

    ov10 Thành viên rất tích cực

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    Utility helicopter
    Manufacturer: Bell Helicopter Textron
    Power plant: Pratt and Whitney T400-CP-400
    Power: Burst: 1290 shaft horsepower (transmission limited)
    Continuous: 1134 shaft horsepower (transmission limited)
    Length: 57.3 feet (17.46 meters)
    Height: 14.9 feet (4.54 meters)
    Rotor Diameter: 48 feet (14.62 meters)
    Speed: 121 knots (139.15 miles per hour) at sea level
    Ceiling: 14,200 feet (4331 meters)
    (limited to 10,000 feet (3050 meters) by oxygen requirements)
    Maximum takeoff weight: 10,500 pounds (4,767 kilograms)
    Range: 172 nautical miles (197.8 miles)
    Crew: Officer: 2
    Enlisted: 2
    Armament:
    * M-240 7.62mm machine gun or
    * GAU-16 .50 caliber machine gun or
    * GAU-17 7.62mm automatic gun
    All three weapons systems are crew-served, and the GAU-2B/A can also be controlled by the pilot in the fixed forward firing mode.
    * The helicopter can also carry two 7-shot or 19-shot 2.75" rocket pods.
    In September 1962, the US military went to a new tri-service aircraft designation scheme, and the HU-1A became the "UH-1A", while the HU-1B became the "UH-1B". The UH-1B saw extensive service in Vietnam. It was initially fitted with the "M-6E3" armament system, which included two M-60 machine guns mounted on an outrigger outboard of each door, for a total of four, and the existing eight-round rocket packs. The machine guns could be aimed by the pilot using a ****pit-mounted sight and a hydraulic actuation system.
    Transport versions of the UH-1 were known as "Slicks" because of their uncluttered appearance. They were generally armed with an M-60 machine guns on a flexible mount in each door to provide covering fire for troops.
    The use of dedicated helicopter gunships to escort "Slicks" or "DustOffs" (as medevac Hueys were known) led to a demonstrable drop in combat damage. In fact, although some Army brass believed that helicopters were too fragile to engage in direct combat operations, Huey loss rates were found to be surprisingly acceptable.
    The UH-1B gunship lacked the power necessary to carry weapons and ammunition and keep up with transport Hueys, and so Bell designed yet another Huey variant, the "UH-1C", intended strictly for the gunship role. It featured the T53-L-11 engine of late-production UH-1Bs, large fuel capacity, and a new "Model 540" rotor system, which eliminated Bell''s distinctive "teetering bar" and replaced it with an electromechanical stabilization scheme. The Model 540 rotor system was known as the "door-hinge" rotor or the "Stability Control Augmentation Scheme (SCAS)". The new rotor also had a wider chord, and was both lighter and provided increased maneuverability.
    The UH-1C was introduced in September 1965, but only about 750 were built, as by that time Bell was getting ready to introduce the optimized AH-1 "HueyCobra" gunship, which was based on UH-1C technology. The AH-1 "Cobra" provided greater speed and maneuverability and was a much more difficult target than the Huey gunships. Nonetheless, the Huey gunship would have its partisans, since its door gunners could lay down fire towards the rear of the helicopter and also provided extra sets of eyes. Huey gunships would in fact remain in service in Vietnam up to the end of the war, though that was mainly due to the fact that there weren''t enough Cobras to replace them.
    UH-1B and UH-1C gunships were fitted with a series of improved armament systems:
    bullet The "XM-3" replaced the 8-round rocket packs and quad machine guns of the M-6E3 with 24-round rocket packs and no guns.
    The "XM-16" was similar to the original M-6E3, but used cylindrical XM-158 7-round rocket pods along with the quad machine guns.
    The "M-5" fitted the gunship with a nose turret mounting an M-75 40 millimeter automatic grenade launcher, with a rate of fire of about 220 rounds per minute.
    The "M-21" was a replacement for the XM-16. It retained the XM-158 7-round rocket pods, but each set of two M-60 machine guns on each side of the rotorcraft was replaced by a single GE M-134 Gatling-type six-barreled 7.62 millimeter "MiniGun" with a rate of fire of 2,000 rounds per minute.
    A Huey gunship with an M-5 was called a "Frog"; one with the XM-3 was called a "Hog"; and one with both was called a "Heavy Hog". It appears that Huey gunships were known generally as "Cobras" or "Snakes" early in the war, but if so, such usage was dropped after the introduction of the AH-1, which became known by those terms instead.
    There were of course many variations, such as fits that used the XM-159 19-round rocket pods in place of the XM-158 7-round pods, as well as improvised weapon mounts. Some Hueys were fitted with wooden chutes outside the doors to allow flight crew to drop mortar rounds on enemy positions, with aircrew simply yanking the bottom doors of the chutes open with wires to drop the loads. This "Mortar Aerial Delivery (MAD)" scheme was reportedly very effective in jungle fighting. Another scheme reportedly used was to drop a 208 liter (55 US gallon) drum full of gasoline and hooked up with a grenade as an informal incendiary.
    Some UH-1Bs were also fitted with six French "SS-11" wire-guided anti-tank missile, adopted by the US as the "AGM-22B", but this was never a popular weapon. The SS-11 had to be guided by "eyeball", with the operator tracking the missile by a flare in its tail and adjusting its course with a joystick. The course corrections were transmitted to the missile by wires that it spooled out in flight. Such a scheme required a highly trained operator and a fairly benign combat environment to be accurate, and as the first was in short supply and the second was almost a contradiction, accuracy of the SS-11 was very poor.
    In the spring of 1972, in the last days of the US involvement in Vietnam, a number of UH-1Bs were fitted with the new BGM-71 "TOW (Tube-launched, Optically-tracked, Wire-guided)" missile. TOW, as its name implies, is a wire-guided missile like the SS-11, but has a much "smarter" guidance system. The weapons operator simply keeps the sight on target and the guidance system figures out the course updates. 81 TOW missiles were fired at that time, scoring 57 hits. In contrast, 20 SS-11 missiles were fired but only scored three hits. The use of TOW in Vietnam paved the way for its widespread adoption as a helicopter store in the post-Vietnam period.
    The last variant of the Model 204 bought by the Army was the "UH-1M", which was obtained both as new-built rotorcraft and as conversions from UH-1Cs. The UH-1M featured a T53-L-13 engine with 1,044 kW (1,400 SHP). It was fitted with the "Iroquois Night Fighter And Night Tracker (INFANT)" sensor system with a low-light-level TV and a searchlight, plus an M-21 gun system, with both the sensor and weapons systems built by Hughes.
    The UH-1M went into service in Vietnam in 1969. Some sources claim that only a few were built for evaluation, but other sources state that several platoons were equipped with the type.
    MODEL 204: USMC UH-1E
    In March 1962, Bell won a Marine Corps contract *****pply the service with an assault support helicopter, resulting in the "UH-1E". The Marines obtained 250 UH-1Es, which were similar to the UH-1B but fitted with an external rescue hoist; a rotor brake to keep the rotor in place during shipboard stowage; and an avionics fit to Marine specifications. First flight of the UH-1E was in February 1963. Deliveries began in February 1964. The Model 540 rotor system, used on the Army UH-1C, was introduced into UH-1E production in 1965. The Marines also obtained 20 "TH-1E" trainers.
    BELL MODEL 204 / UH-1E HUEY:
    rotor width > 13.41 meters (44 feet)
    footprint length > 16.15 meters (53 feet)
    fuselage length > 12.98 meters (42 feet 7 inches)
    height > 4.44 meters (14 feet 7 inches)
    empty weight > 2,155 kilograms (4,750 pounds)
    max loaded weight > 3,855 kilograms (8,500 pounds)
    maximum speed > 220 KPH (140 MPH / 120 KT)
    service ceiling > 5,090 meters (16,700 feet)
    range > 340 kilometers (210 MI / 185 NMI)
  4. ov10

    ov10 Thành viên rất tích cực

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  5. claymore

    claymore Thành viên mới

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    anh OV10 ! anh có ảnh căn cứ Dạ Lê (Eagle 1- gần sân bay Phú Bài , sau này là căn cứ của Sư 1 BB) ở Huế không vậy ? post cho em xem với
    ba em bảo lúc trước UH1 đậu nhiều lắm , hay mang cây nhiệt đới đi thả ở vùng trên.
  6. ov10

    ov10 Thành viên rất tích cực

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    Tôi có một số hình ảnh về căn cứ Camp Eagle ở Dạ Lê. Sau khi kết thúc loạt hình Vĩnh Long tôi sẽ đề cập.
    Bạn có thể vào đây xem bản đồ Camp Eagle.
    http://euphoria.jarkolicious.com/wp-content/excerpt65414.jpg
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  7. ov10

    ov10 Thành viên rất tích cực

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  8. ov10

    ov10 Thành viên rất tích cực

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  9. phaphai

    phaphai Thành viên gắn bó với ttvnol.com

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    Anh trai này tham gia thi hoa hậu Tiền Phong bao giờ đấy mà vào đây?
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  10. giobao111

    giobao111 Thành viên mới

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    Loại F4 này bị Mig 17 nhà ta cho đo đất hàng chục cái. Mà đau nhất lại là trận không chiến đầu tiên giữa Mỹ và KQ Bắc Việt. Sau trận đầu bị Mig 17 đánh nên Mỹ rất cay cú và rút ra một số bài học, trận thứ 2 ta bị mất 04 cái Mig 17, sáu đó ta nâng cấp lên dùng Mig 21. Mig 21 đã hạ cả B52 của Mỹ.

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