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Chapter 1824 Hands-on

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    Speaking of the engine technology of a vehicle, many people can name some terms, such as turbocharging and direct injection.  These are all the engine manufacturers of later generations have to do in order to meet the increasingly stringent emission requirements and fuel consumption requirements.  Many manufacturers also use these things as a selling point. In fact, these technologies already existed during World War II.

    In order to fly to a high altitude, the aircraft must use a supercharger.  Some are mechanical superchargers, which use the engine crankshaft to directly drive the supercharger.  Some are turbochargers, which use the exhaust gas of the engine to blow the turbine.  Even in order to reach an altitude of 10,000 meters, a two-stage supercharger has to be used.

    At the same time, another technology is direct injection in the cylinder.  Gasoline engines used carburetors in the first few decades, just like a watering can, directly spraying gasoline into the intake pipe to form a mixture of atomized gasoline and air.  This is what the engine sucks in.  But this carburetor also caused some problems for the aircraft.  For example, on the European battlefield, German bf109 fighter jets and British Spitfire fighters engaged in air combat.  If the German pilot is bitten, he can freely use a negative g action to get rid of the opponent.  Because the German fighters use direct injection in cylinders, and the British fighters use carburetors, so if the Eagles follow suit, it will easily cause the engine to cut off fuel. The British dare not follow, and of course they will be thrown away.  up.

    Now Qin Baoshan has proposed the method of direct injection in the cylinder.  In this day and age, that is also tall.  Hearing what he said, Cochran showed a surprised expression on his face.  Qin Baoshan has brought too many incredible things to Cochrane.  It never occurred to her that Qin Baoshan even knew this kind of thing.

    Of course Qin Baoshan knows that the engine of the b29 bomber often overheats and catches fire. He knows it clearly, and he also knows how to improve it. The direct injection in the cylinder mentioned now is a way of improvement.  It's just that the Americans didn't start to improve until 1944.  Bendix-Stormberg and American Bosch respectively provided Wright with two different in-cylinder direct injection systems. By measuring the air flow rate, the amount of gas entering the cylinder is determined, and then the main controller will operate the two injection pumps, respectively.  Fuel is supplied to the front and rear cylinders.  This separate fuel supply solves the problem, but these things will not be in service until 1945.

    Qin Baoshan is now talking about this kind of thing. He only talks about the principle, but he doesn't talk about how to operate it.  Americans have plenty of experts and scholars, and they can naturally handle these things.  Qin Baoshan only needs to briefly explain these principles.  That's enough.

    Compared with the previous carburetor, the direct injection system will not increase the power.  But it can solve the problem of engine overheating, while also eliminating the problem of backfiring causing the intake system to catch fire.

    These suggestions of Qin Baoshan completely fooled Cochrane. In his eyes, Qin Baoshan is already the most professional engineer, and he can directly solve these major problems.  Having said this, Qin Baoshan has already said almost the same thing.  Although there are other improvement methods, Qin Baoshan doesn't need to say all of these things, because people in the province are suspicious.  It's as if Qin Baoshan knows this kind of engine like the back of his hand, and it will be difficult to explain it when the time comes.

    After saying this, Qin Baoshan thought for a while, and then continued: "The situation is urgent now. It will take a certain amount of time to wait for the research and development of the scientific research personnel, so if we want to talk about the local method, the easiest way is to add an extra  Snorkel. This does not need to be solved by the aircraft factory, as long as we can complete this task by ourselves.¡±

    After all, the problem of heat dissipation is still because there is not enough fresh air to blow in, so just add an extra pipe to directly fix fresh air in the engine compartment, and this will solve the problem.  In fact, when the b-29 bomber was first in service, the pilots had a lot of headaches about the engine overheating problem, and they directly modified it on the spot by this method: adding an extra air supply pipe could solve it.  Even Germany's most famous fighter jet, the fw-190, used a method of introducing additional airflow to solve this overheating problem.

    What Qin Baoshan is best at is the local method of riding horses, which Major Kromlin once admired.  Now hearing Qin Baoshan's solution, Cochrane's eyes are full of joy: "If we change it now, can we change it before night?" Cochrane couldn't help it anymore, thinking  This aircraft should be changed as soon as possible.  In this way, at night, they can test the flight.

    It would take a long time to wait for the technical personnel behind to improve, and Cochran didn't want to wait.  She wished that this kind of aircraft could solve all the problems immediately.

    Qin Baoshan thought for a while, and then said: "If there is no fuel tank in the middle section of the wing of this plane, the improvement??It should not be difficult.  "

    In order to allow the aircraft to load more fuel, the wings of many aircraft are hollow, and fuel can be placed inside.  The b-29 bomber will not make such improvements until the middle and late stages.  Not only the wing root part of the wing, but even the middle section of the wing will have fuel tanks.  This allows for more fuel to be added.  This initial model should not exist now.

    If there is a fuel tank in the middle of the wing, it is inconvenient to arrange ventilation pipes inside.

    Now hearing Qin Baoshan's worries, Cochrane nodded: "There is no fuel tank in the middle of the wing."

    In this case, let's do it!

    There were originally several maintenance personnel in the hangar. When Cochran brought Qin Baoshan in, they were a little surprised. They didn't know why they brought such an unknown person in.  But when Qin Baoshan talked eloquently, they were all stunned!  This person is like an airplane designer, he can explain all kinds of problems clearly, and he can provide more than one solution.  So they all thought that Qin Baoshan must be an expert from somewhere.  When Qin Baoshan wanted to make a move, they did not stop him at all.

    In the afternoon, Major Kromlin also came over. When he saw that Qin Baoshan had started modifying the plane, Major Kromlin was shocked.  It would be great to have Qin Baoshan come over to investigate. This kind of aircraft is the most secret aircraft in the United States, and Qin Baoshan actually went up to modify it.  This matter can be big or small.  If they are held accountable, Major Cromlin may be in big trouble too.

    But Cochran didn't care, she had a good time doing it.  (Remember the site URL: www.hlnovel.com
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