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Chapter 1021 Extremely High Tactical Value

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    "Chief, I have to go and try this myself." Seeing Zhuang Jianye's joy, Lao Mou was unambiguous, and the head of the headquarters in front of him looked determined.

    Just now, Lao Mou has explained the disruptive role of the "bearingless helicopter propeller hub" very clearly.

    Unlike traditional helicopter propeller hubs, hydraulic cylinders and bearings are required to communicate with the helicopter flight control system to achieve lateral and longitudinal deflection of the blades, thereby achieving steering of the helicopter.

    The bearingless helicopter propeller hub completely abandons this complex mechanical structure and uses two different composite materials to control the helicopter blades using the flexible rotational force of the material itself and a liquid damper.

    The principle is similar to that of a flexible rubber band. After you tighten it, it will automatically return to its original shape when you release your hand.

    Of course, the composite material on the helicopter propeller hub is not as simple as a rubber band, but the basic principles are similar. They all use the flexible resilience of the material itself to complete control transmission and recovery.

    By superimposing and repeating in this way, the helicopter's propeller hub can more sensitively accept the control instructions issued by the pilot, and at the same time, it can quickly return to its original state under the action of the material itself, or stabilize in the pilot's continuous state.

    All in all, he is the kind of well-behaved boxer who can be either salty or sweet, and can be satisfied with any position he wants. Even if the pilot is rude or violent, he can happily endure it.

    In contrast, the traditional hydraulic bearing mechanical propeller hub is not so considerate. Sometimes when the pilot pulls up the control stick, the aircraft always takes a full second or two to react. The same is true if he wants to resume level flight. In addition to holding the control steady  In addition to the rod, there must be a slight downward pressure balancing action, otherwise the hydraulic rod and bearing of the propeller hub will always not respond in time, and artificial intervention can only be exerted.

    This operation places extremely high demands on the pilot. At least there must be an advance of one to two seconds. Otherwise, if the helicopter is sluggish for just one second, unpredictable problems may easily occur, especially on the battlefield.  Because in just one or two seconds, the enemy's missiles came over.

    Pilots driving traditional hydraulic bearing helicopter propellers need to be advanced in advance, not to mention ground crews. The presence of hydraulics and bearings means complex mechanical structures, and complex mechanical structures mean complex maintenance.

    In fact, this is indeed the case. The hinges on the propeller blades, the bearings on the hinges, the hydraulic rods on the bearings, and the hydraulic rods are connected to the bearings on the main frame of the propeller hub

    Every item must be checked, every item must be added with special lubricating oil, and every item must be ensured to be foolproof. However, what drives the ground crew crazy is that the mechanical structure inside each hydraulic bearing mechanical propeller hub is the same as a honeycomb.  Make patients with intensive phobia suffer from numbness in their scalp and pass out.

    Therefore, such a propeller hub is not only a production trouble for the manufacturing company, but also a nightmare for the ground crew.

    Of course, this is not the most important thing. The key is the weight of the hydraulic bearing mechanical propeller hub itself. Even if it uses lightweight titanium alloy, the overall weight is about 600 kilograms, which is still well controlled.  Yes, if it is worse, such as Russia, which uses aluminum alloy and alloy steel in large quantities, the weight of the entire propeller hub will exceed 1 ton.

    "However, Lao Maozi's solution to the problem is simple and crude. Since the propeller hub is heavy, just increase the engine power and make a medium-sized helicopter with more passengers. For example, the Mi-17 is a typical representative of this idea.

    The problem is that there are many models of turboshaft engines in Lao Maozi's hands, so there is no need to worry about adaptation issues, but other countries are not so arrogant. Just imagine, a 4-ton helicopter has a propeller hub of 600 kilograms.  , there is only a quota of about 3 tons left for other places. Even if the helicopter designers are driven crazy and they can barely make a helicopter, there will still be regrets in terms of performance.

    For example, when there are people in the cabin, there is no way to hang supplies on the belly of the aircraft.

    For another example, the modification potential of the aircraft is too small, and the adapted radar cannot be installed on the helicopter propeller hub, so that the helicopter has higher battlefield awareness capabilities, etc

    However, all this has become a thing of the past in front of the "shaftless helicopter propeller hub". If nothing else, it is nothing short of a great blessing for ground personnel. Without the constraints of complex bearings and dense hydraulic rods,  Ground staff only need to conduct regular data monitoring on the composite material of the propeller hub and adjust the connection damper on a daily basis.

    Calculated in this way, the workload is only about 25% of the previous one, which not only allows the ground crew to spend more time on more critical maintenance, but also increases the helicopter¡¯s attendance rate by 10 percentage points.

    Don¡¯t underestimate this 10 percentage point. In emergency operations, let alone 10 percentage points, even 1 or 1 percentage points, it is possible to save the people from fire and water and achieve victory on the battlefield.

    As for weight reduction, let alone weight reduction, composite materials are inherentlyIt is a lightweight material. The bearings and two-thirds of the hydraulic rod are eliminated on the machine, which reduces nearly 50% of the weight. If the blades are also made of composite materials, the main reducer uses a gear-bearing integrated structure.  Then the overall weight loss effect will be more obvious.

    Such extra hundreds of kilograms can be used as a load to realize the mixed transportation mission of manned hoisting for 4-ton helicopters. It also greatly expands the helicopter's modification potential.

    Regardless of others, take hybrid hoisting as an example. Generally speaking, this mode of transportation is mostly used by artillery troops. They use traditional hydraulic rod bearing wheel hubs and traditional cylindrical bearing integrated main reducers for 4-ton helicopters. Although in theory, they can be hoisted through  Type 86 122mm howitzer with special weight reduction treatment.

    The problem is that it¡¯s okay to just stage a promotional video or make a product introduction display board. In fact, real artillerymen don¡¯t like it at all.

    The reason is very simple. It has no actual combat value, because in addition to hoisting an artillery piece, a 4-ton light helicopter cannot carry the operating artillery or the accompanying ammunition.

    You can only leave the old bachelor-like artillery alone and turn over to pick up the artillery and ammunition; or two helicopters can cooperate, one hoisting the artillery, and the other loading personnel and ammunition.

    ?????????????????????? However, this is not very cost-effective and maneuverable, and it is also easy to expose the target and be attacked by the local government.

    This is also the reason why the Ascendas Group's "Air Pickup" helicopter was used to hoist artillery in airborne exercises in the early years, but it was nothing.  Azimuth loading is not possible, which makes the artillery feel useless.

    However, the 4-ton helicopter that has been improved with technologies such as "bearingless helicopter propeller hub" is different. Although it cannot be mixed with big guys like the Type 86 122mm howitzer, it can be mixed with the Type 86 120mm mortar with a total combat weight of 206 kilograms.  Loading is still possible.

    A five-person artillery squad sat in the cabin. A Type 86 120mm mortar and a base number of ten 120mm mortar shells were hoisted under the belly of the aircraft. They then used the improved helicopter to easily attack any blind spot and attack the enemy.  Launch an unexpected fire attack.

    Although the head of the headquarters now leads the aerospace industry, he was a warrior who was baptized by the Liberation War in his early years and fought bloody battles in North Korea for three years. Of course he knows what Lao Mou wants to express, which is one sentence: Such a helicopter has extremely high tactical value.  !

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