Cold start, as the name suggests, is the process of starting the aircraft from the engine shutdown state.
Under normal circumstances, this would be a very complicated process.
Especially for a fighter aircraft like the MiG-21 whose avionics and automation are not very good.
Including the flipping of various switches, the clicking of buttons, the checking of systems and the determination of status - for those who are not familiar with the MiG-21, or any early watch shop cockpit design, the cold start process is simply a piece of cake.
Catching a hedgehog with your hands means you have no way of starting...
But fortunately, for Wang Yu, these will not be a problem.
As a machine girl, Erin can monitor the status of all fighter planes when she is in a state of fusion with the fighter planes.
Because the fighter plane is her body, she will immediately know if there is any problem in the entire plane.
Therefore, Wang Yu can omit most of the inspection steps and only needs to start the engine step by step.
MiG-21 - To be precise, if a modern jet fighter wants to start its engine without external air supply, it must first start its own auxiliary power system, commonly known as APU, to drive the compressor. The generator that comes with a fighter jet must operate properly after the engine is running.
So if you want to start the APU, you must rely on an external power supply.
External power can be provided in two ways - one is to use ground power to connect to the fighter, and the other is to use the fighter's own emergency battery to provide power.
Fortunately, even though the aircraft cemetery where Wang Yu is located is in a remote area, it does have some auxiliary equipment, such as ground power supply.
Before Erin was integrated with the aircraft, all she did was connect the external power supply to the fighter aircraft through wires.
Therefore, Wang Yu turned on the external power supply switch on the fighter jet, and then turned on the APU. The auxiliary power unit was successfully started under the external power supply, driving the engine speed to increase, and at the same time, a slight noise was transmitted to Wang Yu's ears.
When the engine speed increased to about 20%, the fighter's own power generation equipment began to operate normally, replacing the ground power supply and providing power support for the entire fighter. So Wang Yu, who was sitting in the cockpit, turned off the ground power switch.
At the same time, Irene unplugged the wires connected to the fighter plane, and the wires retracted themselves into the generator.
"Fuel pressure is normal, fuel flow is normal, engine speed is normal, and temperature is normal."
Eileen's projection villain stood on the console and reported to Wang Yu the starting status of the engine.
When the engine speed rises and stabilizes at 65%, the fighter has completed the engine starting work.
At this time, the MiG-21's turbojet engine was operating normally, so it made unbearable noise.
If Wang Yu hadn't been wearing a soundproof helmet, his hearing would have been affected at this moment.
"Close the canopy, Erin, and check whether the onboard systems are functioning properly."
He pressed a handle in the cockpit, and the open cockpit of the MiG-21 covered the cockpit. With a beautiful sound of mechanical rhythm, the canopy was locked, and the noise of the external engine was mostly blocked.
.
"The onboard system check is completed, dear, let's go."
Erin's movements are fast.
Without the machine girl, it would take more than ten minutes to complete the inspection and setting of various systems - including radar warnings, fault alarms, gyroscopes, fighter weapon systems, etc., all of which were completed by her in just a few seconds.
Been through it again.
I have to say that although this girl has a weird personality, at least she is very skilled in her business skills.
When he heard her say this, Wang Yu understood.
There are no problems with the fighter plane, and now it is about to take off.
Looking up at the sky, the sun is shining brightly and the air visibility is excellent. It is a good weather for flying.
Look at the wind direction flag hanging in the open space to determine the current wind direction and force.
Wang Yu released the wheel brakes, pushed the accelerator lightly, the engine speed increased, and the fighter began to glide slowly.
The wheels rolled over the taxiway, which was scorched by the scorching sun, and arrived at the runway entrance.
Looking at the straight stretch of the runway, thinking that the fighter plane was about to accelerate on this runway, Wang Yu couldn't help but feel a little excited.
Even though it was not the first time, he was still as excited as the first time.
"The flaps are down, the ejection seat safety is released, and the aerodynamic surfaces are working normally."
He made the final confirmation and controlled the fighter plane to enter the runway.
After controlling the fighter jet to stop on the center line of the runway by pressing the left and right rudders, Wang Yu stepped on the wheel brakes and pushed the throttle forward to the military gear.
The roar of the fighter planes suddenly became louder.
The engine speed rises normally, the temperature and pressure are within the specified range, and you can take off.
He released the brake, pushed forward again with his left hand on the accelerator lever, and pushed the accelerator to the afterburner position.
The engine's afterburner started working, and the single nozzle at the tail of the fighter also produced a beautiful tail flame.
Under strong power, the MiG-21 began to speed up.
The huge push on the back caused by acceleration pressed Wang Yu firmly to the seat.
The Erin projection villain on the console also changed to a kneeling position at this time, as if fighting against overload.
But in fact, as a robot girl, she is not affected by overload, so this action is most likely to be cute.
As the speed on the runway became faster and faster, the fighter plane continued to shake.
After all, the runway is not completely flat.
What's more, what Wang Yu is flying is a war weapon, not a comfortable passenger plane.
The scenery on both sides of the runway quickly passed by. At this increasingly faster speed, it had turned into shadows that would be ignored if you were not paying attention.
The fighter jet accelerated like lightning on the runway with afterburner turned on, and soon reached the critical speed for takeoff.
Wang Yu then gently pulled the joystick backward.
At this moment, the fighter plane was lifted up by a big hand called "Lift".
Accompanied by the jet engine's unique noise of more than 130 decibels, the slender fighter plane was like a sharp arrow shot high into the sky, quickly leaving the ground and shooting straight into the blue sky with an attitude about to pierce the sky.
The climb angle of the fighter plane is maintained at ten degrees, and the engine output is extremely stable.
The plane quickly moved away from the ground, and the horizon disappeared from sight. In Wang Yu's eyes, only the blue sky in the direction of flight was left.
"Positive ascent rate, landing gear retracted."
He pulled a lever, and the landing gear under the fighter plane retracted upward into the fuselage.
"Turn off the accelerator and reach the military push position."
Afterburner for takeoff is just to shorten the process of taking off from the ground. After all, the afterburner gear consumes a lot of fuel.
"Flaps up."
In the last step, the flaps that originally extended downward to create a slight angle are retracted, turning the wings into a "straight" appearance.
The fighter plane's ascent rate changed slightly, which gave Wang Yu in the cockpit a feeling of "weightlessness", but it didn't matter. His altimeter pointer was still rotating, which meant that the fighter plane was still flying upward.
The thrust-to-weight ratio of the MiG-21 is very good. Even without afterburner, it can still ensure that the fighter's speed increases slowly but steadily when climbing upward.
During the take-off phase, Wang Yu's body was pressed into his seat almost the entire time. Especially for a very violent take-off process like that of a fighter jet, what the driver experienced was completely different from what the passengers on the passenger plane experienced.
Feel.
But Wang Yu likes this feeling very much. This feeling of a heavy body, as if a heavy object is pressing down on him, gives people an extremely real experience of "he is accelerating upwards".
Looking back, he had already left the airport behind.
Everything on the ground has quickly become smaller. Those architectural landmarks that may have looked tall in the air don’t look special in the air. The roads have become thin lines extending on the ground, and the vehicles have become small.
Children's toy models and pedestrians have turned into blurry pixels.
The river in the distance glows with silver in the sun, and even further away is the coastline, with sparkling waves on the sea as far as the eye can see.
There are mountains in the inland direction, but even those mountains with an altitude of several thousand meters cannot touch the height that the fighter plane climbed to at this time.
This is why Wang Yu likes to fly, he can see everything from high in the sky.
Being in the blue sky, away from all the complicated things on the ground, is an extremely refreshing experience.
At about the same time, the fighter's oxygen supply system started working, providing Wang Yu with oxygen-rich air through the breathing tube and mask on his helmet. The pressurization equipment and air conditioning equipment in the cockpit also started operating at the same time, providing the pilot with a
Relatively comfortable flying environment.
But again, fighter planes are weapons of war after all and cannot be compared with the comfort of passenger planes.
This is where the complex "clothes" worn by pilots come into play.
The warm flight suit worn inside, the anti-gravity suit and the compensating suit worn outside protect the humans in the cockpit from harm as much as possible.
The climb speed of the MiG-21 is still sufficient, after all, it flies higher than the Phantom.
"It has reached an altitude of 5,000 meters, dear, it is time to level off."
At the end of the climb, Irene said softly to Wang Yu.
Wang Yu then stopped pulling the stick backward, and the fighter slowly returned to level flight.
"This time it was much smoother than last time."
He confirmed that the fighter plane was flying very stably and said with satisfaction: "So what are the next arrangements?"
"Flying south along the coastline, bearing 210, a distance of forty nautical miles, we want to fly over the southern mountainous area, which is our official test flight area."
With the machine girl, Wang Yu doesn't even need to look at the waypoints, he just listens to her report.
Wang Yu adjusted the flight direction so that the fighter plane pointed to the 210 position, and at the same time complained.
"There is no other way. Although the Imperial Air Force has approved our right to fly here, after all, we are flying black and have weapons mounted on it, so it is better not to provoke the Imperial Air Force's nerves."
The MiG-21 fighter jet roared close to the coastline, and then flew south above the intersection of sea and land.