By the time Philip arrived at one of the company's parts shop with Messerschmitt and a group of engineers, the engineers didn't quite understand what was going on today.

When I arrived in the workshop, I saw that there were more than ten older machine tools neatly placed inside, and the nameplate was in German. More than 10 workers are busy processing M20 transport aircraft parts, in fact, they are very ordinary parts, the difference is the material, most of the aluminum alloy used, neatly stacked on the ground with thick aluminum plates enough to process a lot of parts.

Fortunately, it was just for demonstration, and there were no stainless steel sheets in this space-time, so Philip decided to use these aluminum alloys for processing.

Philip thought for a moment and then said to the crowd, "Okay, you may not understand why I brought you here. Actually, today, I'm going to make a miniature jet engine on the spot, and I'm going to show you it, and then we're going to talk about developing a jet engine. What do you think? ”

In fact, Philip thought at this time that in later generations, there are many aviation enthusiasts who can "copy" small turbojet engines! As long as you have a common sense of organic processing and materials, understand metals, and understand the structure of jet engines, you can use very simple materials to make a small jet engine with a thrust of several kilograms. Even, if conditions allow, he can make a model of a remote-controlled jet plane.

The FD3-64 model aircraft turbojet engine designed by the Briton Kurt Schreckling created a precedent for the design of small engines, and the radial compressor, annular combustion chamber and turbine made in a simple way achieved good results. His philosophy has been confirmed by the latest improvements in a variety of new designs, and they are all based on his designs. Many aviation enthusiasts have successfully used engines in model airplanes based on his writings.

Messerschmidt's face was full of incredulity: "What? Can a jet engine be made on the spot? Does this work? ”

The rest of the people opened their mouths even wider and looked at Philip with astonishment.

Philip smiled undeniably and said, "Okay, you'll know in a while!" ”

Coming to a machine tool to stand still, Philip asked the workers to find some aluminum alloy plates, as well as some tools and equipment.

With the operation of the processing equipment, the aluminum alloy sheet soon became a part in Philip's hands, which is no longer a machined part, but a performance!

Philip said as he worked: "The engine shell with a diameter of 12 cm and a length of 20 cm is bent with a 2.5mm duralumin alloy plate shear, and the airfoil can be polished with a small electric drill and a small grinding wheel. Failure to do so will lead to the disintegration of the engine!! It is to use our thumb and forefinger to feel the vibrations. The turbine, combustion chamber, compressed impeller and air guide ring are also made of aluminum alloy plate cutting, bending and twisting, and the air guide ring is finally welded to the shell with a welding gun. ”

"In addition, the turbine shafts and bearings are made locally. Compressed air is passed through the bushings to provide cooling to the bearings, which are simple ball bearings that are lubricated by their own compressed air pressure oil to provide oil mist lubrication. Turbine oils, or low-viscosity mechanical lubricants can be used. Philip said.

In the exclamation of everyone, Philip continued to process, without raising his head: "The thrust pipe has an air inlet diameter of 80mm, a spout of 75mm, a length of 43cm, and is made of stainless steel with a thickness of 0.1mm. There must be about 10mm of clearance between the air intake and engine nozzles of the pipe, and careful adjustment of the distance between the engine nozzle and the pipe can increase the thrust by about 2 Newtons, and it is most advisable to have the pipe more than 3mm above the nozzle. The working temperature of the pipes will reach 350 degrees, and it will be useful to use aluminum poisers with glue for insulation. ”

Soon, a miniature jet engine appeared in front of everyone, Philip looked at the miniature turbojet engine in his hand with satisfaction, and said with a smile: "Please find a small oil pump, as well as kerosene, aviation gasoline, and then I will show it to everyone." ”

As he spoke, someone had already taken a small oil pump and a small barrel of gasoline.

Philip quickly installed the miniature jet engine, and then said loudly: "Everyone, please stand away, this engine is not a product that has been tested, and if it fails, the parts flying out at high speed will be as deadly as shrapnel!" The turbo speed of this jet engine can reach tens of thousands of revolutions per minute, so you have to be careful! ”

Everyone withdrew their hands, only to see Philip quickly insert the oil pipe into the oil barrel, turn on the oil pump to remove the air from the pipe, and then connect it to the small jet engine.

After the engine starts, the high-speed turbine emits a "buzzing" sound, and the high-temperature gas sprayed out makes a non-stop "whirring" sound, and the high-temperature exhaust makes the people present feel that the air suddenly becomes hot! I didn't expect a jet engine to work so smoothly in just one hour, which is amazing!

Looking at the jet engine, which was only the size of a cup, Messerschmidt nodded and sighed: "It's shocking! ”

Philip was a little embarrassed, in fact, he directly quoted the achievements of later generations, and said with a smile: "The structure of this jet is very simple, and there is a big gap with a high-thrust jet engine, the thrust is only a few kilograms, and due to the influence of materials and processing accuracy, the life may only be a few hours!" And it is not easy to develop a jet engine for an airplane, which is a hundred times more complex than this in terms of structure! We have a lot of problems to solve in terms of design, materials and processes! ”

With that, Philip stepped forward and turned off the engine.

Only then did everyone gather around to take a closer look, only to see that the temperature of this engine had been very high after a few minutes of operation, and the shell was constantly emitting heat to the surroundings.

Philip continued: "A real jet engine, it's much more complex than what you see. A real jet consists of several stages of low-pressure compressors, as well as more sophisticated high-pressure compressors, and high-pressure turbines that can withstand thousands of degrees of heat, all of which are mounted on a single rotor, while this demo product has only one stage of low-pressure compressor impeller; Secondly, the air enters the annular combustion chamber after being compressed by the compressor, and is mixed with the fuel oil to burn and expand to do work, and the high-temperature and high-pressure gas then passes through the turbine to promote the turbine to rotate at high speed, and finally sprays out at high speed through the nozzle to produce reaction thrust! If it is a jet engine used in a fighter jet, it is best to add an afterburner behind the turbine, this kind of jet engine with added afterburner, also known as afterburner, can make the aircraft quickly accelerate to a higher speed during takeoff and combat approach. ”

The engineers present were all aware of this, and they all bowed their heads in contemplation.