The Thundercat raced through the Aetheric Sea, and in the blink of an eye, it overtook the test ship flying at a speed of 180 knots.

"Xiu Ji, what is our speed now?" Summer Night asked behind her.

An airspeed gauge that relies on etheric wind pressure measurement is installed in the thruster, and the current speed can be easily read through the cat-machine interface.

"250 knots!" Xiu shouted.

Just as Summer Night thought, the speed of the Thundercat easily exceeded the upper limit of the test ship. However, it was not enough, at least 290 knots were needed to ensure that the thruster entered ram mode.

Summer Night lifted the spear and let it turn into a ray of thunder and merge into her body, the speed of the thunder cat suddenly increased, and she asked again, "What now?" ”

"260 knots!"

It seems that it is not enough, Xia Ye thought about it, and lifted the mask on his face, and at the same time, with a movement of his mind, a head suspended in the air slowly opened his eyes, revealing the surging and tumbling snow electric light in his eye sockets.

This time, without waiting for Xia Ye to ask, Xiu Ji took the initiative to shout: "278 knots!" ”

"Start the thruster and let it go into fan mode first." Summer Night said.

Xiu replied, giving the ignition command and injecting magic into the thruster, and a moment later, a low roar came from behind him, and at the same time, there was a strong vibration under the p-strands.

"Good cheer!" Summer Night exclaimed in surprise and couldn't help but move the body straddling the cat's back.

"This meow is more bumpy than you, you, you~~~" Xiu Ji was so vibrated that the whole tentacle trembled, and even the voice of the voice changed.

"It's turbulence! This fan can't adapt to such a high wind speed at all, and when you enter the ram mode, you lock the fan, and it shouldn't vibrate......" Xia Ye analyzed.

"Then hurry up and fast forward! This book is a cat, a cat is about to suffer, I can't stand it, I can't stand it~~~"

Even if she didn't rush it, Summer Night would do it, because her little puff was also numbed. She immediately dissolved the shin armor that protected her calves, and even lifted her shoes, and at the same time that the thunder light melted into her body, her smooth legs clamped the cat's body hard, and the thunder cat screamed, and the speed of running suddenly increased a lot.

"2222299995555 !!"

Xiu Jian finally waited for this moment, and without waiting for the summer night to give the order, he activated the compression ignition contract.

There was a loud "boom", followed by a high-pitched running sound behind him, and the summer night turned back to see a steady golden flame spewing from the tail of the thruster.

Xiu Ji immediately locked the fan, and the shaking that vibrated the summer night and Xiu Ji was worse than death finally disappeared. The thrusters are still functioning normally, and because of the increased thrust, the Thundercat is even faster than it was just now.

"How many knots are there now?"

"300 knots...... Master, I can't hold it anymore! ”

"Is there that much thrust?" Summer Night asked strangely.

"It's not thrust, it's too hot!"

In the so-called ram mode, the aether is constantly deflagrated in the compression combustion chamber, and the temperature of the thruster shell becomes very high.

"You're afraid of getting hot?"

"That's how our race is!"

"Okay......"

Xia Ye turned around, took the thruster from the tentacle, hugged it like a pillar, and nearly 100 kilograms of thrust came, but fortunately, the "Thunder Knight" strengthened her strength, so that the thruster would not fly out like a missile.

As soon as the metal shell of the thruster came into contact with the armor, the thunder flashed on the surface of the armor - it seemed that the temperature was indeed very high, and if it weren't for the protection of the armor, her skin would have been scorched in an instant.

The tips of Xiu's tentacles were still stuck in the thrusters, providing a steady stream of magical power.

"Don't you feel hot?"

"The interface is slightly better~"

It seems that after going back, I should mention it to Chris, at least the area where the interface is insulated, otherwise I won't be able to stand it if my tail is stuck in it, Xia Ye thought to herself.

"It's almost time for us to fly back." Summer Night said, controlling the Thunder Cat to start turning, the duration of the "Thunder Knight" was only three minutes, and she had to return to the test ship before the effect of the contract wore off.

In the sea of clouds, the snow-white cat dragged a golden tail flame across a huge arc and ran back in the direction it came. Although the test had been successful, Summer Night didn't rush to get Xiu to stop the thrusters, she wanted to let the test ship's Chrissy and the others also take a look - time should be enough.

Half a minute later.

The oncoming test ship came into view, and Chriss, Yaha, Xiu, and the other thruster engineers involved in the test all stood on the deck in anticipation. The crowd erupted in cheers as the Thundercat staggered past the test ship, and they saw the golden tail flame spewed from the thrusters, a sign of ramming mode.

Summer Night controls the Thundercat to turn around again at the back of the ship, and after catching up with the test ship, it turns off the thrusters and finally lands on the back deck.

She jumped off the cat's back with the thruster in her arms and carefully placed it on the stand, and the Thunder Knight contract ended just as well, and the remaining armor and cat on her body disappeared without a trace in an instant.

"Clothes, help me find a dress......" Summer Night said to Chriss, clutching her chest.

If there is anything bad about the "Thunder Knight" contract, it is probably that it is too expensive to wear, and every time you use it, the clothes on your body will be burned to ashes.

Soon, someone brought a spare sailor's suit from the ship, put it on on Summer Night, and then said to Chriss: "We successfully entered ram mode at 295 knots, but we also encountered some problems, such as the thrusters vibrating violently in fan mode at 278 knots......"

Chriss, noting the problems found in the test, said, "Most of the problems are relatively easy to solve, but the critical speed of entering the stamping mode is more troublesome...... 290 knots, this speed is too high, you can't use the 'Thunder Knight' to accelerate every time, right? I don't know how much the critical speed can be reduced after the improvement, but even if it is reduced by 20% to about 230 knots, it is still too high, and the whaling ship must drive afterburner to reach this speed......"

"Actually, I thought of another way that should solve this problem." Summer Night said.

"Hey, what's the solution?"

"Let's go to the bridge, I'll draw it, and you'll understand it at a glance."

After a moment, Chrissy looked at the sketch drawn by Summer Night and wondered, "You just came up with this?" ”

"It's not." Summer Night admits it calmly.

"Oh...... So that's another city's approach? ”

"Well, but the power is a little different, they use electricity...... Well, it's magic-driven, but that's too complicated, and I don't know how it was designed, but good thing I have something they don't have, and it should end up working ...... the same."

……

In the blink of an eye, another few days passed.

Chriss's team worked overtime to improve the thrusters, and during this time, they tested the thrusters twice with the Thundercat on summer nights, and the turbulence and thermal insulation problems were successfully solved, and the critical speed of entering ram mode was reduced to 270 knots.

Eventually, the prototype of the smallest aether ramjet ever built by Debussota was finally completed, and Summer Night named it the "Witches Strike-1" type thruster, or "WS-1" for short.

(End of chapter)