The two quickly got into the cabin and methodically prepared for takeoff.

Krogel flicked the switches one by one, and then his eyes looked at the engine in the wing on the left.

"Buzz, buzz." A puff of black smoke came out, and there was a roar from inside the engine.

This is not to start the engine, but only to start the two-stroke engine in the "bullet" cone in the middle of the engine intake.

The jet engine cannot spin on its own, and it must be driven by other power to reach a certain speed before it can start.

In the roar of the starting engine, the fuel pump began to pressurize, and the high-efficiency aviation fuel was pumped to the six independent combustion chambers in the middle of the engine, and at the same time, the 8-stage axial compressor in the engine rotated and began to continuously agitate the air into the combustion chamber.

When the engine has been driven to 3,000 revolutions per minute, Klegel flipped the ignition button, and instantly, fuel was sprayed from the independent combustion chamber, and under the ignition of the spark plug, it burned violently, and the high-temperature and high-pressure gas pushed the unipolar turbine behind it, and then sprayed out from the tail nozzle.

The ground crew observed from a distance, the inner flame was orange, and the outer flame was fading, which was normal.

"Left hair is normal." The ground crew shouted over the radio.

Kroelle continued to start the right engine, and after a few minutes, flames also came out of the engine on the right, and both sides started normally!

After receiving confirmation from ground staff, Kroegle observed that the instruments were working again, and then pushed the throttle sticks on both sides forward.

The turbojet engine emitted a characteristic whistling sound, which made Klogel intoxicated every time, and he stared at the dashboard in front of him, where the engines on both sides had reached their maximum speed of 9,000 rpm, and at this time, the thrust on both sides exceeded a ton.

The whole plane was shaking, as if it was going to be ready to fly at any moment.

Klogel relaxed his breath and shouted over the radio, "Inazuma Seven, please take off." ”

"You can take off, and I wish you all the best."

Klegel released the brakes and at the same time pressed the four linkage buttons on one side of the lever together.

Under the wings on the outside of the engine, there are two attachment points, which are specially prepared for the Walther 109-500 take-off booster rocket.

As he pressed the button, the booster rockets were also violently ignited, each booster rocket could burst out with 500 kilograms of thrust, plus two engines, a total of four tons of thrust, propelled the eight-ton plane to glide quickly on the runway.

(To explain, the unit of force should have been Newton, and the ton was the unit of mass, but in many terms, I like to use how many kilograms of thrust to express, in fact, it should be multiplied by 9.8 to get the thrust value. ）

The lightning bomber began to glide up the runway, getting faster and faster.

In fact, even without booster rockets, lightning bombers can fly completely, but that would require a longer runway, after all, jets need a large take-off speed, and the addition of booster rockets can effectively shorten the take-off distance of the aircraft, reduce fuel consumption, and extend the range of the aircraft.

In this era, the limit of the piston engine also makes the thrust-to-weight ratio of the whole machine reach about 0.4, while the thrust-to-weight ratio of ordinary propeller bombers is only about 0.2, and the thrust-to-weight ratio of the current lightning bomber has reached 0.5.

Both of them felt a huge force coming from behind them, pressing them against the back of their seats, and at the same time, everything on the ground on both sides was rapidly retreating.

The bombers began to accelerate.

The speed of the jet requires the pilot to be more responsive, and Krogle glanced at the speedometer out of the corner of his eye, and when the speed reached 250, he pulled the lever back.

The wheels in front of it were raised in an instant, and the bomber continued to slide forward on the runway for dozens of meters with its head held high, and then the main landing gear behind also left the runway.

Historically, lightning bombers have also used pit dad's tackle to take off, but now this method has not been used, and it is completely a normal landing gear.

At this time, the four booster rockets were at the end of their work, they continued to burn for a few seconds, the fuel ran out, and then, Klegel pressed the release button, the four booster rockets fell from the wings, the parachute opened automatically, and under the action of the parachute, slowly fell to the ground.

These booster rockets are liquid-fueled and can continue to be used after they have landed.

Recovering the landing gear, Klegel took the lever and continued to climb up at a small angle, and from now on, in addition to speed, he also needed to take into account fuel consumption.

Compared to mature piston engines, jets are quite fuel-intensive, and the historical ME262 can only fly near airports, which is impossible to catch up with compared to the range of piston fighters that can easily be hundreds of kilometers.

Now, however, the German jet engine has advanced quite rapidly, the fuel consumption rate has dropped much compared to the historical engine, and at the same time, one of the advantages of the bomber is that it is large and can carry more fuel.

The Lightning Bomber has a total fuel load of a staggering 4,200 litres, which is stored in three fuselage tanks, with the front and rear tanks being self-enclosed and the middle tank unguarded.

This fuel was enough to support the Lightning bomber back and forth to and from Petersburg, but it still had to be used sparingly.

The altimeter continued to turn, and soon it rose to an altitude of 10,000 meters, and Klogel leveled the plane, aligned it with the direction of his partner Janssen, and flew straight to Petersburg.

At an altitude of 10,000 meters, the lightning bomber became a bright spot, and the hot gas ejected from its tail quickly spread and cooled down in the atmosphere, causing some water vapor in the atmosphere to condense and pull out a white trail in the sky.

The engine speed dropped to 7,000 rpm, and the bombers flew along the course at a speed of 700 kilometers per hour, and after half an hour, they caught up with the huge group.

At this time, it happened to be over the Baltic Sea, with the blue sea below, and the blue sky overhead, and the escorting F190 fleet also happened to converge with its own bombers.

"Chief, at six o'clock, I found a new fellow." At this time, in the F190 fleet, one of the pilots exclaimed: "It has no propellers!" ”

Hearing the call on the radio, Group Leader Heinz Bahr breathed in the air inside the oxygen mask and said, "035, pay attention to radio call discipline. ”

Needless to say, he knew that it was Merritt who was the most unruly in the army, and he reprimanded as he turned his head back.