Chapter 1200 Lightning Bomber Takes Off

The two quickly got into the cabin and made preparations for takeoff in an orderly manner.

Kroeger flipped the switches one by one, and then his eyes turned to the engine of the left wing.

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

This doesn't start the engine, it just starts the two-stroke engine inside the "bullet" cone in the middle of the engine intake.

A jet engine cannot spin on its own. It must be driven by other power to reach a certain speed before it can be started. The current way of starting the jet is to use this special starting engine.

In the roar of starting the engine, the fuel pump began to pressurize, and the high-efficiency aviation fuel was pumped to the 6 independent combustion chambers in the middle of the engine. Agitate the air into the combustion chamber.

When the engine had been driven to 3,000 rpm, Kroeger toggled the ignition button, and instantly, fuel was sprayed from the independent combustion chamber. Under the ignition of the spark plug, it burned vigorously, high temperature and high pressure gas, Push the rear unipolar turbo and spray it out of the tail nozzle.

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

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

Kroeger continued to start the right engine, and a few minutes later, the right engine also burst into flames, and both sides started normally!

After receiving confirmation from the ground crew, Kroeger observed that the various instruments were normal again, and then pushed the accelerator levers on both sides forward together.

The turbojet engine issued a unique whistle. This sound made Kroeger very intoxicated every time. He stared at the dashboard in front of him. The engines on both sides had reached the maximum speed of 9,000 rpm. , the thrust on both sides exceeded a ton.

The whole plane was shaking, as if it was ready to fly at any time.

Kroeger let out a breath and shouted on the radio, "Lightning Seven, please take off."

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

Kroeger released the brakes, and at the same time, pressed the four linkage buttons on the side of the operating lever together.

Under the wing on the outside of the engine, there are two external hanging points, which are specially prepared to hang the Walther 109-500 take-off booster rocket.

As he pressed the button, the booster rockets also ignited violently. Each booster rocket could explode with a thrust of 500 kilograms. With the addition of two engines, a total of four tons of thrust could propel an eight-ton aircraft. Roll quickly on the track.

(Explain, the unit of force should be Newton, and the ton is the unit of mass, but in many terms, how many kilograms of thrust are like to be expressed, in fact, it should be multiplied by 9.8 to get the thrust value, not a layman in East China, That's what everyone calls it.)

The Lightning Bomber began to roll on the runway, getting faster and faster.

In fact, even if there is no booster rocket, the Lightning bomber can still fly, but that requires a longer runway. After all, the jet needs a high take-off speed, and adding a booster rocket 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 the ordinary propeller bomber is only about 0.2, and the current lightning bomber, the thrust-to-weight ratio has reached the sky-defying 0.5.

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

The bomber began to accelerate.

The speed of the jet is fast, which requires a more sensitive response from the pilot. Kroeger glanced at the speedometer out of the corner of his eye, and when the speed reached 250, he pulled the control lever backward.

The wheel in front was lifted in an instant, and the bomber held its head high and continued to roll forward on the runway for several tens of meters. Then, the main landing gear behind it also left the runway.

Historically, Lightning bombers have also used a stumbling block to take off, but now this method has not been used, it is completely normal landing gear.

At this point, the four booster rockets have reached the end of their work. After they continue to burn for a few seconds, they run out of fuel. Then, Kroeger presses the release button and the four booster rockets fall from the wing. Down, the parachute opened automatically, and under the action of the parachute, it slowly fell to the ground.

These booster rockets are liquid-fueled and can be used for dismantling and inspection after landing.

Retracting the landing gear, Kroeger took the lever and continued to climb up at a small angle. From now on, in addition to speed, he also needed to consider fuel consumption.

Compared with mature piston engines, jets are quite fuel-intensive. Historically, ME262 can only fly near the airport. Compared with the range of several hundred kilometers of piston fighter jets, it is impossible to catch up.

But now, the progress of German jet engines is quite rapid, and the fuel consumption rate is much lower than that of historical engines. At the same time, one of the advantages of bombers is that they are larger and can carry more fuel.

The total fuel capacity of the Lightning Bomber reached an astonishing 4,200 liters. The fuel was stored in three fuselage fuel tanks. The two fuel tanks at the front and rear were designed to be self-closing, and the fuel tank in the middle had no protective measures.

The fuel was enough to power the Lightning Bombers back and forth to Petersburg, but it still had to be used sparingly.

The altimeter continued to rotate, and soon it rose to an altitude of 10,000 meters. Kroger leveled the plane, aligned the direction under the instructions of his partner Jansen, and flew directly to Petersburg.

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

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

At this time, it happened to be over the Baltic Sea, the blue sea below, and the blue sky overhead. The escort of the FW190 fleet also happened to converge with their own bombers.

"Boss, at six o'clock, I found a new guy." At this time, a pilot in the FW190 fleet exclaimed: "It has no propeller!"

Hearing the call on the radio, Brigade Captain Heinz Barr said while breathing the air in the oxygen mask: "035, pay attention to the discipline of radio calls."

Needless to say, he knew that he was the most unruly Merritt in the army, and he turned his head back while berating him.