Like ｜ This domestic helicopter fills the gap and makes its first flight today! (with a large number of high-definition pictures)
CCTV News:Today, another "Made in China" will meet with you!
A new generation of medium-sized multi-purpose helicopter AC352 jointly developed by China and Airbus Helicopter Company of France will usher in its first flight in Harbin, the ice city today (live broadcast notice: What are the design features of AC352? How was the first flight? At 9:30 this morning, come to the CCTV news client and Weibo to watch the live broadcast. CCTV journalists are waiting for you at the scene)! It fills the gap between the 4-ton and 13-ton helicopter pedigree in China, and it is also one of the most advanced helicopters in this tonnage level in the world at present, and its main components, including engines, have been localized. The following CCTV News takes you to meet this "new member" of the helicopter family in China — —
Name: AC352
Place of origin: AVIC
Model: 7-ton medium-sized multi-purpose helicopter
First flight time: December 20, 2016
What are the characteristics of AC352?
Wide fuselage and large space
The maximum take-off weight of AC352 is 7 tons. It adopts conventional aerodynamic layout, with double engines, wide fuselage, retractable wheeled landing gear at the first three points, and conventional layout design of single rotor with tail rotor. The cabin space can meet the needs of carrying 14 to 16 passengers.
Widely used and versatile.
AC352 helicopter can be widely used in search and rescue, general transportation, medical rescue and offshore operations.
Safety, economy and environmental protection
It is understood that AC352 helicopter is one of the safest, most comfortable, most environmentally friendly, easiest to drive and most economical medium-sized multi-purpose helicopters in the world.
AC352 memorabilia:
In March 2011, AC352 helicopter successfully carried out static test in Jingdezhen;
In January 2012, AC352 helicopter completed the bird impact and lightning strike test;
In 2013, AC352 helicopter completed lightning strike, bird impact and tail beam strength test of middle fuselage components;
On August 31, 2014, the first AC352 was delivered to the final assembly;
On September 9, 2015, the prototype machine was unveiled at the Tianjin Direct Expo;
On March 21, 2016, the first machine of AC352 entered the ground power-on test stage;
On November 2, 2016, a press conference on the first flight of AC352 was held;
On December 13, 2016, it passed the first flight release and technical quality review;
On December 20, 2016, the AC352 helicopter made its first flight.
What are the high technologies of AC352?
Spherical flexible main hub with 5 rotors
Rotor is one of the most complicated technologies in a helicopter. As an iconic part of a helicopter, rotor plays a decisive role in the altitude, speed and distance of a helicopter in flight. During the Ninth Five-Year Plan period, China has conquered the world’s advanced spherical flexible hub technology. This third-generation rotor system developed by China for the first time has been applied to newly developed multi-type civil helicopters in recent years, showing superior performance.
Engine inlet net cover
Due to the take-off and landing characteristics of helicopter, the rotor will produce a strong downward airflow, which will blow dust and debris or even stones on the ground. Once these debris are absorbed by the engine of the helicopter, it will affect the service life and cause engine damage. Therefore, the front end of the intake port of helicopter engine usually has a metal mesh shield filter device.
Engine tail nozzle
According to the working characteristics of turboshaft engine, the general exhaust device is cylindrical diffusion, so that the gas can fully expand in the free turbine and be converted into shaft power as much as possible. The exhaust device of modern turboshaft engine can achieve more than 95% conversion of gas power.
Airspeed sensor
A tubular device with an opening on the nose facing the front of the aircraft, which is connected with a pressure measuring device in the cockpit and used to measure the flight speed of the aircraft.
winch
The winch installed in helicopter is usually an optional equipment for helicopter, which is powered by hydraulic pressure and power supply and lifts the effective load by winding steel cables or cables. The electric winch can be used to rescue people, lift and transport light goods, and lift people from high altitude for aerial work when the helicopter is hovering.
Helicopter fuel filler
The AC352 uses JET A1 or JP4 fuel.
AC352 tail rotor
Helicopter tail rotor is used to balance the reaction torque and steer the helicopter. The rotating tail rotor is equivalent to a vertical stabilizer, which can stabilize the helicopter heading.
Avionics system
The AC352 adopts brand-new avionics system, 4-axis dual redundancy flight control system and advanced warning system with key system warning, fault identification and maintenance built-in test functions, which can reduce the workload of drivers.
What is the significance of the first flight of AC352?
AC352 is a successful practice of China helicopter industry under the guidance of the principle of "independent development and active international cooperation". Its appearance fills the gap in the 7-ton pedigree of China civil helicopters and makes the product pedigree of AVIC helicopters more complete.
(This article Source: CCTV News Watch Aviation AVIC)