Helicopter rotor propeller blades are made of metal materials, but the blades affect lift in the dusty environment of the Middle East due to easy wear. To solve this problem, Russia is transforming rotor blades with glass fiber and non-metal composite materials.
Russia’s famous military enterprise, the Russian Technology Group, published an article on its official website a few days ago that Russia’s air transportation experience in Syria, Iraq and other places showed that when helicopters landed there, they would set off cyclones full of sandy soil. This will accelerate rotor blade wear, affecting lift and flight maneuverability.
In view of this, the Russian helicopter company's R & D personnel used two new materials to improve rotor performance. First, after the spar body of the leading edge of the rotor is completed, the technician will stretch the spar into an annular machine, and the four column heads on the inner wall of the machine will use four strands of glass fiber filaments to wind the spar from end to end. It was wound up and repeatedly wound 144 times; afterwards, titanium metal sheets were used to wrap the front edge of the spar to protect the electric deicing system there.
According to R&D personnel, the spars are reinforced by glass fiber and titanium sheet, and their sturdiness can withstand the wear and tear of gravel and dust in the Middle East, and can withstand the short-term impact of ground fire. Coupled to the rear of the spar are the lower sections of the blade that are getting thinner and thinner. In order to minimize the weight of this component, the experts completely replaced the traditional metal materials of the component with a glue-coated composite material. The company’s video shows that when the rotor is laid flat, the internal structure of the rear section of the blade is like numerous hexagonal honeycomb holes that open up and down. With non-metallic composites, this honeycomb structure helps reduce the weight of the rear section of the blade, allowing the helicopter to fly higher.
In addition, in order to improve the overall stability and service life of the rotor, the company also uses a carbon fiber composite material to mold the entire rotor once in a single mold.
The Russian Air Corps Commander-in-Chief Bundarev revealed that the modified Russian-made Mi-28NM "Night Hunter" helicopter gunship will first install composite rotors, which will be put into mass production by 2018.
Experts from Russian Helicopter Company said that if the Mi-28NM helicopters can verify that the above new materials have excellent performance in actual combat, more Russian armed and transport helicopters will be equipped with this new rotor. (Reporter Hao Hai)
The products are suitable for preparation of Flexible Polyurethane Foam plastics, such as furniture mat, mattresses and sound-absorbing board, carpet bottom, filters, packaging materials, etc. When foams are produced,the amount of the additives is variable and adjustable in a wide range.They also have good stability during foaming.
Polyether Polyols for Flexible Foams
Polyether Polyols For Flexible Foams,Flexible Polyurethane Foam,Polyether Polyols For Waterproof Coating,Polyether Polyol For Flexible Foam
NINGBO LUCKY CHEMICAL INDUSTRY CO. LTD , https://www.chinaluckychem.com