Time： 2024-08-18
韋克威科技
The Russian Il-112 test flight resulted in the destruction of a fire engine and loss of life, leading to the near collapse of the Russian aviation industry
The Russian Il-112 test flight resulted in the destruction of a fire engine and loss of life, leading to the near collapse of the Russian aviation industry
The sudden plane accident just now, the crash of the Russian Il-112V test flight!
This is a screenshot of the plane crash video, let's take a step-by-step look at the tragic accident process.On August 17th, TASS reported that a prototype of a Russian Il-112V transport plane crashed in Kubinka, Moscow Oblast, resulting in the death of all three crew members. The 63 year old captain, Nikolai Kuimov, was awarded the title of "Hero of Russia" in 2006 and can be considered a meritorious test pilot of Russia.Let's take a look at the plane before and after the accident, from left to right, it can be basically confirmed that the accident was caused by a fire in the engine part on the right side of the plane. At first, the plane kept level, but over time, it gradually lost control and eventually tilted to the right, crashing in a belly up position, resulting in the destruction of the entire plane and loss of life.At present, several preliminary inferences can be made that this accident was caused by a fire, which came from leaked fuel. It is highly likely that the high-pressure fuel pipe of the aircraft ruptured and was eventually ignited by the engine jet. There are two possibilities for the pipe rupture: one is in the engine area of the aircraft, and the other is in the fuel pipe transmission section from the wing to the engine outside the engine area. The normal wing structure leakage is caused by a small water pipe, not a high-pressure fuel pipe, and the fire is not so big.
The fire occurred in approximately this area.At present, the occurrence and extension of fires are like this, which is probably caused by oil leakage from the fuel pipeline (including joints), ultimately leading to such accidents. As we all know, normal twin engine aircraft designs have single engine safety design guarantees. After a single engine fails, the normal operating procedure is to shut down the engine on the faulty side and then cut off the fuel supply this time.The normal engine on one side can quickly burst into a high-power state, ensuring the normal landing of the malfunctioning aircraft. However, this time, the aircraft lost balance, ultimately leading to tragedy. This has a clear clue: the left engine is working normally, providing forward pulling force, while the right engine is not working properly, producing huge resistance and ultimately causing a deflection torque, causing it to crash onto the street.Normally, when encountering a propeller type engine failure, in addition to cutting off the oil circuit, the engine control system will also turn the propeller of the engine to the feathering state, which is simply the state with the lowest resistance. This video is very short, and it can be preliminarily speculated that the control circuit or control system of the engine was burned out, and the propeller did not turn to the feathering state normally, causing huge resistance, and the plane quickly lost control and crashed.This is the stationary and working state of the aircraft's engine. As you can see, there is a lot of resistance. If there is an engine failure and the vehicle is turned off, the engine blades will rotate 90 degrees and be in a particularly low resistance downstream state.Overall, in this accident, the pilot may not have detected the fire in a timely manner, dealt with it slowly, and ultimately the faulty engine on the right side did not stop in time, causing the propeller to pitch smoothly, resulting in the aircraft losing control. This is also a rare occurrence in the past 20 years when aviation powers have developed new types of cargo planes: test flights catch fire and burn out.Designers around the world attach great importance to airplane fires, installing fire detectors on the engine to detect engine temperature. Normally, there are temperature sensors inside the engine cavity and flames outside the engine casingsensorHowever, this type of detection is not intuitive and cannot directly detect problems like cameras. Perhaps in future aircraft designs, this image-based approach should be addedsensorCan you provide a more direct image.
This time the plane crashed, it can be inferred that it was either due to improper design or manufacturing quality issues. Regardless of the type of problem, it was very painful.At present, fuel pipeline rupture or joint oil leakage should be the most fundamental cause. Overall, there may be several reasons. One is that there is a problem with the quality of the pipeline or joint, such as improper heat treatment causing strength issues of the parts, or fine scratches appearing during the processing and assembly process. Under long-term high-pressure work, the cracks gradually expand, ultimately leading to tragedy. This kind of thing is not uncommon in aviation manufacturing around the world, so special attention should be paid to the inspection of parts.In addition, the pilot's operation this time is a bit intriguing. If the flame detector works normally and the pilot responds in a timely manner, clues should be discovered quickly and measures should be taken quickly. Currently, the fire is spreading too quickly and there is no sign of stopping or weakening.This is also the current difficulty for airplane pilots. Although the cockpit has been vitrified and equipped with multiple LCD panels, there is indeed a massive amount of information on the airplane. In the event of an accident, multiple sensors will sound an alarm, such as a fire, insufficient engine power, or all sorts of messy things coming out at once, which can be very uncomfortable.The Il-112V is not a large aircraft, and this accident is a tragic warning to aviation enthusiasts and passengers around the world that the safety of air travel is not taken for granted, and requires efforts in design, manufacturing, use, and maintenance. Any problem in any aspect can lead to a particularly tragic outcome.Now let's take a look at the basic situation of the Il-112V transport aircraft. The reason for this aircraft is to replace the old An-26 light military transport aircraft of the Russian Air Force. At the end of 2004, the two-year bidding work for the new light military transport aircraft of the Russian Air Force ended. The Il-112V designed by the Ilyushin Design Bureau defeated the Su-80TD designed by Sukhoi Design Bureau, the Tu-136T designed by Tupolev Design Bureau, the M-60LVTS designed by Miyashev Design Bureau, and the MiG-110VT designed by Gaoyang Design Bureau. The aircraft was put into production at the Voronezh Aircraft Manufacturing Plant, which can be regarded as the first 5-ton carrying capacity military transport aircraft developed by the Russian Air Force after the end of the Cold War.Similar to transport capacity aircraft, there is the Y-7 domestically, but the Chinese Air Force does not attach great importance to this level of aircraft. There are the 20 ton Y-8 and Y-9, as well as the top 50 ton Il-76 and Y-20, so they are constantly undergoing minor modifications.The following are official information from the manufacturer: The Il-112V is equipped with two TV7-117ST turboprop engines developed by Klimov, each with a power of 2800 horsepower. If one engine fails, the power of the other can automatically increase to 3000 horsepower, ensuring the safe landing of the aircraft (of course, in today's accident, this safety design firewall was mercilessly penetrated)The engine is equipped with a 3.9-meter diameter SV-34M low-noise 6-plade pull in propeller made of composite materials. The Il-112V also plans to install a VK-3500 engine with a power of up to 3500 horsepower, which is also a progress made by Russians in the engine industry. In recent years, our country has been working hard on turboprop engines, and it is not too difficult to create an aircraft that surpasses the American C-130J. There is no doubt about building an aircraft similar to the Il-112V. We don't know if we will purchase a batch from Russia in the future for fun.The fuel system of Il-112V is very reliable (cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough cough. In addition, the aircraft is also equipped with a TA-14 auxiliary gas turbine engine developed by the Russian "Aviation Power" scientific manufacturing enterprise, which can ensure that the main engine can be driven at an altitude of 2000 meters and a low temperature of -40 ℃ (the ability at this altitude is not enough, if our country wants to be able to use it, it must be 4000 meters. The ability at an altitude of 2000 meters cannot reach the Qinghai Tibet Plateau, and it can barely be used in the the Yunnan-Guizhou Plateau. In terms of this data, the Air Force will not buy it). The main engine can be driven without preheating. The auxiliary engine can also ensure that the main engine can operate safely at an altitude of 6000 meters and a speed range of 250~450 km/h.
This is the new Russian turboprop transport aircraft Il-114, with a well streamlined rear fuselage. The Il-112V is military and has a high butt.
Basic information of the aircraft:The Il-112 was originally planned for military transportation in complex and harsh weather conditions, with a weight and size similar to the An-26. Its maximum takeoff weight is 21 tons and cargo capacity is 5 tons, both slightly lower than the An-26, but the difference is that it has a larger cabin capacity, which can carry more personnel and materials.Moreover, its fuel consumption has been reduced by 38% (which is a 50 year advancement in aviation technology, including materials, equipment, aerodynamics, structural design, processing, and engine technology), but its range has increased by almost twice compared to the -26, reaching 5200 kilometers, and modern aviation electronics and onboard equipment have been adopted, reducing the crew to 2 people. It is said that in the future, the Il-112V will not only replace the An-26, but also compete with the world's best transport planes of the same class (of course, in this accident, the only prototype is gone, and the test pilots are also gone. Which customer without eyes will continue to buy it? Will the Russian Air Force continue to burn money to support research and development? These are still huge unknowns).Here are the highlights of the airplane:The Il-112V and Il-114 civilian transport planes use the same engines and spare parts to improve the versatility of the aircraft and reduce costs (civilian to military conversion is a traditional Russian tactic, using the same money to buy two planes, our country's Y-7 and Y-8 are the same, originally from the demand of Soviet civil aviation, and then transferred to military use, all of which have a lot of verbose problems. Of course, these two planes are not foolish enough to have a common body design. With a common engine, some spare parts, and a common body design, no one is favored. Civilian use requires fuel efficiency, while military use requires a runway for forced landing and takeoff).The onboard high lift device of an aircraft can ensure low-speed takeoff and landing, and the driving, navigation, and radio equipment can ensure the flight of the aircraft in any region and under complex weather conditions. These designs comply with the requirements of the International Civil Aviation Organization (ICAO) (this is a common practice in the world, with navigation, communication, and driving standards. Military aircraft are designed according to civil aviation standards, which also indicates that civil aviation standards are more scientific and advanced, which many people cannot imagine). In addition, the aircraft has made further improvements in enhancing its electronic warfare capabilities, survivability, and safety (electronic warfare and survivability are unique requirements for military aircraft, while safety is for both military and civilian use, but the design scenarios for military aircraft are more complex, such as gun injuries, and some parts require armor installation).
Russians still attach great importance to airplanes. After having a little money, they began to develop new types of airplanes. Although their technology is still slightly inferior to that of the West, after the Cold War, the gap between the East and the West was basically eliminated, and the design and manufacturing technology and components of civil aviation aircraft rapidly spread, which greatly improved the level of Russia's civil aviation aircraft.The Il-112V is also equipped with highly reliable aircraft rescue equipment and adopts redundancy technology, flight safety monitoring and alarm system, and flight data recording system, which can analyze the entire flight process and quickly identify the cause of accidents (this is the black box system of civil aircraft, which is so high-end). All of these devices enable the Il-112 to carry out combat missions independently for a long time at field airports with poor conditions.As an Il-112V aircraft, it is truly a tragedy. The plane has experienced two shutdowns, the first of which was due to the economic crisis in Russia in the 1990s, which led to the cancellation of the Ilyushin self funded project. After winning the bidding in 2004, it crashed again in 2011, mainly due to the use of the An-140 jointly designed by Russia and Ukraine. Later, Russia and Ukraine fell out, and after two years, it continued to be launched. The plane was delayed for more than 20 years. In 2018, during the test flight, it was found that the performance of the plane was seriously substandard, reportedly exceeding the weight by 2 tons. The second test flight was conducted on March 30, 2021, and was showcased at the 7th International Military Technology Forum on August 13. On August 17, Crash (from this perspective, the Russian government sees this aircraft as a tool for marriage alliances, kicking it away if it wants to win over foreign countries, continuing if the relationship is not good, and being a scumbag).
In terms of aircraft demand design, both China and Russia require a small military cargo plane that can directly load and unload cars and containers, which is also acceptable.Currently, both the military and civil aviation industries in Russia are facing significant challenges. The Su-57 fighter jet did not meet performance standards and crashed during its last test flight at the end of 2019 due to engine thrust vectoring system and control chip malfunctions.As the first regional airliner developed by Russia after the end of the Cold War, the SSJ100 Superjet developed by Sukhoi Design Bureau was struck by lightning during takeoff from Moscow airport, resulting in communication and flight control system failures. During an emergency landing, the plane crashed and caught fire, causing dozens of casualties (with so many planes hit by lightning, why did their new plane crash? It is likely that they did not conduct the lightning test according to the standards carefully).In addition to the recent Il-112V fire accident, it can be said that the Russian aviation industry has started to decline, with very poor design and quality control. This can also be confirmed by the evaluation of our country's use of the Russian AL-31FM1 engine. The FADEC system (engine digital system), which was originally intended to provide engine reliability and safety, has become the most unreliable playthrough on the engine.
This is the belly of the Su-75 fighter jet, bumpy and orange peel like.The wingtips of the treasure Su-57 fighter jet in the hands of the Russian Aerospace Forces in the new century should have been laid off long ago in any normal country, and designers should have been dealt with. Wake up, this is not the World War II era, it is now the 21st century!Whether it's the Su-57 fighter jet or the new Su-75 fighter jet, the manufacturing process of garbage is really difficult to appreciate. This is the 21st century, not during World War II, and the Russian craftsmanship level is extremely disappointing.At present, the propaganda of the Russian aviation industry is still full of various ambitions, aiming to attack any country other than the United States. However, in reality, their capabilities are far inferior to mere rhetoric.This is also the charm of the aviation industry, with high technology, high returns, and high risks. From designers to workers, from management to maintenance personnel, everyone needs to be serious and conscientious. Any attempt to act recklessly with even the slightest bit of luck will ultimately result in significant losses.From this perspective, safe airplane travel requires the efforts and cooperation of excellent designers, workers, managers, pilots, maintenance personnel, and various component suppliers. This is a long chain, and a country that can create advanced and safe airplanes represents a large group of outstanding talents in the country!Source: Guoke Huanyu
