Xiu looked up and found that Xia Ye's group was walking towards her.

"Long time no see......," she said, "and thank you......"

Before she could finish speaking, Xia Ye had already guessed what she wanted to say: "You're welcome, I want to use your tail, that's why I bought the wing bones...... How much does it eat? ”

"I've eaten it all...... A meow~"

"Then it should have grown a little bigger, right?"

"Hmm." Xiu nodded, and the black tail dangling behind him suddenly swelled and became taller than her person, but the shape did not change to the shape of a tentacle, but instead looked fluffy, and the shape was a bit oversized fox tail.

"Oh!" Summer Night couldn't help but exclaim, "Have you already released the mimicry?" ”

"Hmm...... That's what it is...... Its original form ......"

"It seems that the clone has completely fused with your witch body!" Xiu said, "Even the original form has become different. ”

Summer Night stepped forward, cautiously reached out and touched the surface of the tail. It's soft, a little warm, but it's smooth, if you want to describe it, probably like a down pillow.

"Uh-huh......" Xiu snorted lightly.

"What's wrong?"

"It's a little itchy......"

"Is the tail so sensitive to the touch?" Summer Night was surprised.

Xiu nodded, and the two triangular cat ears on his head shook slightly.

"That ......" Summer Night suddenly smiled evilly, then opened her hands and hugged her fluffy tail, letting her face rub against it.

"Bha~ Wait a minute...... Don't ...... like that"

"What's the matter, let me rub it for a while, it's so comfortable, it's like a pillow, slip~" Summer Night suddenly stretched out her tongue and licked it lightly on her tail.

"Babble!" Xiu screamed, and Xia Ye's arms suddenly emptied, and by the time she reacted, the tail had already turned into a thin one, shrinking behind Xiu.

Xiu's cheeks were red, it was the first time since they met Xia Ye to see this kind of expression on her, she grinned, and was about to say something, but was interrupted by Yaha: "Stop playing, aren't you here to test the thrusters?" ”

"But the tail is really cute......" Xia Ye muttered, and finally returned to the topic: "Why is Xiu also here?" Are you ready to prepare the cat detector interface today? ”

The so-called "cat machine interface" is a noun coined by Xia Yesheng, which refers to the interface where the cat witch connects the thruster through her tail and controls the operation of the thruster.

"If the test goes well, the interface can be tested today." "However, the main reason for this is another thing, and we need her 'simultaneous reinforcement'. ”

"Huh?"

"Because the thrusters may explode during the test run." "So we need 'simultaneous strengthening' to strengthen the hull, and we only have this test ship right now, and if the ship is blown up, it's going to be a big problem!" ”

……

A moment later, the group arrived on the bridge, where the thruster test was clearly visible through the window. As Chrissy gave the command to begin the test, the test ship retracted its airbags and began to accelerate, reaching a cruising speed of 180 knots in a short time.

The ship's barrier then began to shrink, exposing the aft deck and the small thrusters attached to it to the etheric winds.

"Check the fuel circuit." Chrissy gave the command.

The engineer next to him operated on the crystal plate, and after a moment responded: "The fuel circuit is normal!" ”

"Start the contract chain self-test."

"The contract chain is normal."

"Enter the 'synchronous strengthening', count down to five seconds to ignition, and start the first test run."

Translucent curves suddenly appeared around the test ship, and the repair entered a state of "synchronous strengthening". Almost at the same time, the engineers also began to count down.

"Five, four, three, two, one, ignition!"

A roar was heard, accompanied by a slight tremor, and the thrusters on the stand were running smoothly.

Chrissy and the engineers breathed a sigh of relief for a moment—at least it didn't explode. However, it is still too early to say that it will be successful, and now it is only the fan intake mode, and it is necessary to enter the ram mode and run stably for a period of time before the test run can be considered successful.

"Report on the Ether Compression Ratio."

"Compression ratio...... 1.09。 ”

"It's too low...... Chrissy whispered.

Aether is a very difficult substance to compress, but because of this, the compressed aether can be ignited by magic to produce deflagration. The compression ratio is related to the intake speed, the shape of the intake cone, the length of the compression ignition type and other factors, and the minimum compression ratio required for deflagration is 1.22, 1.09 is obviously unable to achieve ether deflagration, and it is impossible to enter the ramjet propulsion mode.

"The fan intake is too inefficient and the compression combustion chamber is too short...... Nowadays, it is only possible to reach a critical value by increasing the speed at which the etheric wind blows into the thrusters. Chrissy quickly decided: "Raise the speed of the boat to the highest speed, fly as fast as you can." ”

A louder roar than the test thruster sounded from the stern, the test ship began to accelerate, and the pointer of the ship's tachymeter slowly climbed to the right from the position of 180 knots, 190 knots, 200 knots, 220 knots...... By knot 235, the hands could no longer move, and the ship shook as if it would fall apart at any moment.

"Report the compression ratio!" Because the roar was so loud, Chrissy had to roar to make the people around her hear.

“1.21！ No...... It's down to 1.20 again! The compression ratio beats repeatedly between 1.19 and 1.21! The engineer shouted.

"Start the Compression Ignition Contract! Let's see if we can enter stamping mode! ”

"Yes!"

The engineer clicked on the crystal panel a few times, and soon, a higher-pitched roar was heard, the thrusters on the stand shook violently, and the tail erupted with golden flames, but it lasted less than a second before it went out, and the high-pitched sound also fell back, drowning in the noise of the ship itself.

"Failed! The compression ratio is too low! The engineer shouted.

"......" Chrisse didn't respond, seeming to hesitate to try again.

"Please make a decision quickly! The test ship did not last long at this speed! ”

"Abort the test!" Chrissy shouted that she only had this one thruster and did not dare to risk it.

The speed of the ship began to drop rapidly, and soon it was back to 180 knots, and the test ship circled around the etheric sea at cruising speed. The thrusters on the bracket for testing stopped completely, and even the fan stopped turning.

"The compression ratio was not enough, it didn't work......" Chrissy said to Summer Night with some frustration.

"But it seems like it's just a little bit? If the boat is a little faster, maybe it will be successful? ”

"Their relationship is not linear, and if you want to enter ram mode steadily, you need to ...... the speed of the boat," Chrissy calculated quickly in her mind, "...... To 290 knots. ”

"Even Moby Dick can't drive that fast." Summer nights remember that the maximum speed of the "Moby Dick" was 280 knots.

"yes." Chrissy said helplessly.

This means that even if the fastest ship is brought in, there is no guarantee that the thruster will be put into ram mode.

"It seems that the fan, the intake cone and the compression combustion chamber need to be improved a little more, and that's it for today's test......"

"Wait." Summer Night interrupted, "I have a solution. ”

"Huh?" Chrissy looked at the summer night in surprise.

"The boat can't reach that speed, but it can be done in other ways." Summer Night said, "I can use the 'Thunder Knight' contract ......"

……

After a few minutes, she finally convinces Chrissy and Yaha. The group returned to the stern of the ship and removed all the pipes and wires attached to the thrusters.

"This is the insertion port of the integrated interface, which is what you call the 'cat machine interface'."

Pointing to a rectangular socket 6 centimeters long and 2 centimeters wide on the thruster, Chrissy said, "It's what makes the magic and the control commands are inputted. ”

This was originally an interface designed for Xiu's tail, but this time, Summer Night was going to let Xiu Ji provide magic and control the thrusters - after all, Xiu's proficiency in mimicry was far less than Xiu's.

The black cat shows its original form, and the front end of the tentacle is simulated into the shape of a plug and connected to the thruster. It was not difficult for Shoggers to figure out how to control the thrusters, and after about ten minutes, Shogs was able to control it without any obstacles.

“B-r-C-l-r”

As the witch text of "Thunder Knight" was read, the armor condensed by thunder light appeared on Xia Ye's body, and in addition, there was a huge cat by her side.

"This—Is this what you call the 'Thunder Knight' contract?" Chrissy asked in surprise.

"Hmm."

Summer Night turned over the cat, and Xiu Ji also rolled up the thruster and "sit" behind Summer Night.

"If this thunder cat runs at full strength, it should be able to exceed 290 knots, and when the time comes, Xiu Ji will start the thruster on the cat's back, and if it goes well, it should be able to enter ram mode."

"You have to be careful. While the fan mode works fine, the ram mode still has the potential to explode. Chrissy reminded again.

"It's okay, the Thunder Knight is quite resistant to beating." Summer Night tapped his fingers on the thunder armor on his body, "As long as I don't disarm them, even if they explode, they won't hurt me." ”

With that, she gently patted the back of the cat's neck. Thundercat leaped hard and left the test ship with her, Xiu, and the thrusters.

(End of chapter)