Half a month later, the M40 transport aircraft began to enter the development stage, the engine will use BMW's piston engine, and the exhaust gas turbocharger under development will be installed, as well as a six-blade torque conversion propeller. The overall structural design was carried out at the Dragon Soul Aircraft Manufacturing Company, while most of the subsystem design was carried out by the experienced Messerschmidt company.

The M40 transport aircraft is the second product of the Messerschmitt company after the M20 light transport aircraft, and it is also a unique large transport aircraft. Whether this aircraft can succeed or not is related to the future of Messerschmidt and Dragon Soul Aircraft Manufacturing Company, so both sides are working at full speed and fully engaged in development.

At this time, the development of exhaust gas turbochargers has finally come to an end, and more than ten prototypes of exhaust gas turbochargers have finally been successfully trial-produced and will be installed for testing soon. This is a great event for the fledgling Dragon Soul Aircraft Manufacturing Company!

The exhaust gas turbochargers will be sent to Messerschmitt and installed on the M20 transport aircraft for flight testing to check that they meet the design specifications. Because of the importance of the turbochargers, Philip personally led a team to escort them to Messerschmidt, along with David and Paul.

Coming to Messerschmidt in Bavaria again, Philip couldn't help but feel emotional. The last time I came here, I was helping the company market the M20 transport aircraft, and it was a great success, and the all-metal torque conversion propeller also became popular, and now the sales momentum is good. However, Philip knew that it would not be long before these all-metal torque conversion propellers would be copied by other aircraft manufacturing companies, so by the time all-metal torque propellers became popular, the profits would be very small. Only by speeding up the development of the M40 large transport aircraft and more advanced aircraft can the Dragon Soul Aircraft Manufacturing Company truly become a unique aircraft manufacturing company in the field of aviation industry, and then can it enter other weapons industry fields more quickly.

In the conference room of Messerschmidt, the coordination meeting for the installation and testing of aviation turbine exhaust gas boosters was held under the chairmanship of Messerschmidt, and the discussion was intense and enthusiastic.

At the beginning of the meeting, Philip explained the working principle and structure of the WZ-1 aviation exhaust gas turbocharger of Dragon Soul Company.

Philip looked at the dozen or so Messerschmidt engineers in the conference room, and said confidently: "Colleagues, we all know that when the aircraft using the aviation piston engine as the power plant flies at high altitude, due to the increase in altitude, the atmospheric pressure and air density gradually decrease, so the amount of air entering the piston engine decreases, and the oxygen content also decreases significantly, which leads to the gradual decrease in the maximum output power of the aviation piston engine. Therefore, the flight altitude of the aircraft currently using aviation piston engine is generally not more than 5,000 meters, and the highest is not more than 8,000 meters. ”

Philip paused, found that the engineers nodded in response, and continued: "In order to meet the requirements of high-altitude flight of the aircraft, improve the ceiling of the aircraft, and reduce the fuel consumption rate of the engine, and increase the available power of the aero engine, it is very necessary to install the exhaust gas turbocharging system in the aviation piston engine, from the theoretical calculation and analysis, the single-stage turbocharging can increase the flight altitude of the M20 light transport aircraft by more than 40%, from 5000 meters to more than 7000 meters, If you use two-stage turbocharging, you can reach more than 12,000 meters, and with three-stage turbocharging, you can reach an astonishing 15,000 meters. Moreover, with the exhaust gas turbocharger, the fuel consumption of the M20 can be reduced by more than 10%, and the available power at high altitude can be increased by more than 15%. ”

Hearing this, an engineer from Messerschmitt asked: "May I ask Mr. Philip, since this exhaust gas turbocharger has such a great effect, and we have also understood its structure and principle, but now it seems that only the Americans have successfully developed it, and most of the aircraft will use a supercharger, what are the characteristics of the WZ-1 turbocharger, which can make the M20 transportation performance be so greatly improved?" ”

Philip replied confidently: "The WZ-1 aero piston engine exhaust gas turbocharger of our Dragon Soul Aircraft Manufacturing Company is mainly composed of two parts: compressor and turbine. The turbine uses part of the energy of the exhaust gas to convert into mechanical work, and the compressor uses the mechanical work output of the turbine to increase the air pressure, and then transports the charge air to the piston engine cylinder to achieve the purpose of pressurization. The WZ-1 supercharger has a small size, a small flow rate and a high speed, in order to avoid the problem of blade strength at high speed, it adopts a high-strength alloy and a radial turbine. It is composed of turbine intake shell, rotor, intermediate shell, compressor volute, diffuser and compressor intake shell and other components, please take a look. ”

Speaking of which, Philip picked up the turbocharger parts that had been prepared long ago, showed them to the engineers one by one, and explained in detail what each part does.

"The rotor system of the WZ-1 turbocharger consists of a first-stage centrifugal compressor and a first-stage radial turbine, the compressor part includes 9 large blades and 9 small blades, and the turbine part includes 13 small blades. These blades are all made of new aluminum alloy jointly developed by Dragon Soul Company and Bofors Company, which has the characteristics of high strength and light weight, with a working speed of about 90,000 rpm and a boost ratio of 2.8. With the increase of altitude, the speed of the compressor increases, the amount of exhaust gas flowing into the turbine increases, the amount of air discharge decreases, and when it reaches more than 8000 meters, all the exhaust gas flows into the turbine to do work, so the engine in the process of altitude increase, due to the intake pressure compensation effect of the turbocharger, the power and torque remain basically unchanged, until the boosting capacity of the turbocharger above 8000 meters can no longer guarantee enough intake pressure, and the engine power will decline rapidly. If we want to solve the problem of continuous elevation, it is necessary to increase the boosting capacity of the supercharger and adopt multi-stage pressurization. Philip finished explaining the working principle and structure of the WZ-1 turbocharger in one breath, and saw that the engineers in the field listened attentively one by one, and did not react for a long time.

Messerschmitt took the lead in applauding: "Well done, Philip! Then the crowd came to their senses and applauded.

Messerschmidt exclaimed: "Philip, your WZ-1 exhaust gas turbocharger is very sophisticated, I believe that as long as it is installed on the M20 transport aircraft, it will be successful!" Let's talk about the installation and testing of the WZ-1 exhaust gas turbocharger, so that we can start testing it as soon as possible, and put it on the M20 transport aircraft one day earlier, so that the performance of the M20 can be improved one day earlier! ”