Using the magnetic poles of the planets to judge the direction is the most scientific way, but the magnetic poles are not directly related to the direction of rotation, if the north and south are judged by the magnetic poles, and then rotate clockwise to determine the east and west directions, it is likely that the sun will set in the east and rise in the west, so it has become a common practice in the military to use the direction of the sun rising as the east.

In many cases, science is no match for custom, and this is just one example.

"I'll leave it to you, Natsu." Hong Liang immediately arranged the task.

"Understood." Xia Zhuoyan immediately complied, and quickly replied: "Twelve degrees south-east, two thousand six hundred kilometers away, there is a relatively large city. ”

"Two thousand six hundred kilometers?" Ye Fei asked in surprise, "This is too close, right?" Walking for 140 days, and not walking 20 kilometers in a day? ”

He made a gesture at Ji Xiaotong, who caught the red beard, Ji Xiaotong willingly carried the wooden wheel back to the flying mecha, activated the flying armor and jumped lightly, jumped on the top of the mecha more than three meters high, and got into the cockpit.

The eleven bearded men who saw this scene were in an uproar, and they had the heart to rush up to rescue the city lord, but they didn't have the courage.

Fortunately, Mu Lun was still acquainted, and hurriedly shouted a few words like "I'm fine", and stabilized the feelings of other bearded people.

It's a blessing or a curse, it's a disaster that can't be avoided, it's not a good idea to confront a powerful messenger, since you can't resist, let's be honest and cooperate.

"2,600 kilometers is a straight-line distance, separated by three mountain ranges, and you have to walk at least more than 4,000 kilometers." Xia Zhuoyan replied.

Ye Fei, who was deflated, rolled his eyes: "Got it." After speaking, he waved his hand at the eleven bearded men twenty meters away, turned his head and strode towards the flying mecha. Jumped up and got in.

The cockpit of the flying mech was not spacious, and there was not much room left after cramming two commandos, and then squeezing into a wooden wheel, which was a bit stuffy with a sardine can.

Fortunately, the wooden wheel wearing only a robe was much slimmer than the commando wearing armor, Ji Xiaotong took off the bullet box behind his back and put it on the side, finally squeezing out a little space for the wooden wheel, so that the hatch could not be covered.

"Are you ready?" Ye Fei shouted and asked at the same time, and started the flying mecha.

The eleven bearded men in the square and the hundreds of civilians around them all widened their mouths in shock as they watched the flying mecha slowly rise into the air, until the flying mecha accelerated and flew away and could no longer be seen. I slowly came to my senses.

After the mech is activated. The original black-and-gray screens on the four walls of the cockpit were activated at the same time, and the ground under him suddenly became high, startling the wooden wheel, and the red-bearded octopus, who thought he was about to fall, hugged the bullet box in front of him like a claw.

This time, Ji Xiaotong was startled. Three times and two times, he ripped the wooden wheel off the bullet box and put it aside: "Be honest with me!" ”

Luckily, the wooden wheel only held the bullet box. The machine gun was not touched. Otherwise, if you hit Gatling, you will have to smash the cockpit.

At this time, the flying mecha had risen to a height of several hundred meters in the air, and the terrified wooden wheel roared hysterically. It wasn't until Ji Xiaotong couldn't help but give him a kick that he realized that he hadn't fallen.

The wooden wheel touched and touched the ground like a child with a new toy, and couldn't help but admire, and curiously craned his neck to look down, and saw the much smaller city at a glance.

Having never seen his city from this angle, Kiwa's eyes widened.

"Dirt buns." Ji Xiaotong said viciously, "You really should tie him outside!" ”

"Okay, what are you doing with him?" Ye Fei smiled dumbly, "It's almost the same to tie you outside." ”

That's no joke.

Tie the wooden wheel outside, the low pressure and low temperature in the air and the wind pressure generated by high-speed flight will kill the wooden wheel, but Ji Xiaotong, who is protected by armor, has no problem in this regard at all.

"Chief, you can't be so cruel, can you?" Ji Xiaotong immediately pretended to be pitiful.

"Whoever told you not to drive the mech, if necessary, I will." Ye Fei raised his eyebrows and said.

"I curse you never get a chance!" Ji Xiaotong did not hesitate to sacrifice the feudal dross and aversion to victory.

"Ha, you kid, if this trick is really useful, how good it would be if you just cursed the Shang clan and the Zhen clan or something to die, and we don't have to fight any wars, the Ministry of Defense can directly let you be the minister and you can be invincible and directly dominate the entire universe!" Ye Fei burst out laughing.

Ji Xiaotong smiled bitterly: "Don't make fun of me." ”

At this time, the flying mecha had already begun to accelerate, and the city on the ground was soon left far behind.

Mu Lun's eyes widened and stared at the rapidly retreating earth, mountains and rivers under his feet, and then looked at the clouds floating around him, eager to look at the ground with one eye and the sky with the other.

The speeding flying mecha suddenly broke through the sound barrier, and a cone-shaped sonic boom erupted from the nose, and the white fog-like phenomenon was fleeting, causing the wooden wheel to sit on the ground, stunned and unaware of what was happening.

The flying mech rose higher and higher, and the thin air at high altitudes greatly reduced the atmospheric resistance, so that the mech flew faster and faster, soon reaching five times the speed of sound, and the speed continued to increase.

After a while, the mecha flew into the stratosphere, and the blue sky above it gradually changed to a deep starry sky dotted with bright lights, and the earth bun wooden wheel was dumbfounded.

The speed of the flying mech was finally stable at Mach 10, but because it was high in the air, it looked like it was floating quietly in the air and did not move.

Due to the different transmission speeds of sound under different atmospheric densities and pressures, the current speed of the flying mecha is not more than 3,400 meters per second, but close to 2,800 meters per second.

If it weren't for the fact that the planet's atmospheric pressure was a little stronger than the standard atmospheric pressure on Earth, it would have been estimated that the speed of flying mechs would be a little faster.

Air resistance is the biggest obstacle to flight in the atmosphere, and it is said that the military once designed a "vacuum aircraft", which uses strong suction to pump out the air in front of it, and extracts a large amount of gas in a short period of time to form a small vacuum in front of the aircraft, so as to use the atmospheric compensation for the vacuum to push the aircraft forward.

It's a pity that this flashy flying machine didn't make it into the military's equipment sequence in the end.

There is also gossip that after the successful development of the teleportation cannon, some people proposed a new method, that is, to install the teleportation cannon on the fighter plane or small warship to use the teleportation light to extract the air in front of the aircraft and create a vacuum channel, thereby propelling the aircraft forward.

However, due to various reasons, the plan was rejected as soon as it was proposed. (To be continued......)