Xu Ming felt that the exploration progress of the portable world must be accelerated.

Although he is so big that he can't explore it in a short period of time, and it can't even be explored in ten years.

But he must speed up efficiency.

At least in your own mind, build a rough impression of this planet.

Because he used the different light angles of the stars at noon, with a distance of about 200 kilometers, and the different stars' light angles, he roughly calculated the diameter of the planet under his feet, which was about 10,911 kilometers and the planet's radius was 5,455 kilometers... more than 14% smaller than the radius of the Blue Star 6,371 kilometers.

According to the ball's area formula, the surface area of ​​the portable world is 373.7 million square kilometers... about 73% of the area of ​​the Blue Star.

It is equivalent to the size of the country of Xia, which is forty.

Assuming that Xu Ming's exploration effect is very high, it will take forty years to explore all areas equivalent to the size of Xia Kingdom in one year.

Xu Ming's life may only be like a hundred years, and it is impossible to put nearly half of his life in the wild to explore.

Therefore, his strategy is to only focus on exploration and not fully explore.

In addition, it is to find ways to speed up the speed and efficiency of exploration.

He has been here at the portable world for nearly two years (time in portable world), but in previous years he has only penetrated more than 500 kilometers and went north to more than 200 kilometers, which has combined more than 700 kilometers... On average, he explores more than one kilometer every day.

This efficiency is very salty and very slow.

Speed ​​up must be carried out.

"It is best to explore two hundred kilometers a day, and complete a 100,000 kilometers of exploration mission within five hundred days, which is equivalent to three circles around this planet."

"Of course, except for twists and turns and turns, it is actually like going around two laps."

"But just circle two circles, one circle north and south, and another east and west, the planet under your feet has basically established a rough impression."

But explore two hundred kilometers every day!

This is a rather constant journey.

At his speed of walking about 5 kilometers per hour in the wild, he had to walk for forty hours a day... but he didn't have so much time a day.

Of course, you can use transportation.

There are mountain bikes, electric scooters, four-wheel drive off-road vehicles, motorcycles...the speed can be accelerated three to ten times.

But the premise is that there must be a relatively easy way to walk... and the dense forests in the south have no way to walk, so you have to open the way while walking.

By the way, can Xu Ming buy some flying devices and walk on an air road without obstacles and unobstructed? Wouldn’t the exploration speed be greatly accelerated?

For example, gliders, fixed-wing propellers, and helicopters can be selected, with speeds above 100 kilometers per hour, and it is easy to fly a distance of 200 kilometers.

Especially the fixed-wing propeller plane, if it is fast, it can fly tens of thousands of kilometers a day and circle the planet in three or four days, which greatly saves time.

However, whether it is a fixed-wing propeller aircraft or a glider with similar structural principles, they were eliminated by Xu Ming and a fork was made.

"I explore the world of my own to gain something. What can I gain if I fly around the sky all day without falling to the ground?"

"There is no trace of human development in the portable world, not much flat ground with a length of more than 100 meters. Even if there is one, it may not be the place I want to go."

"In the dense forests in the south, there is flat terrain, but it is all covered with plants. If there are any new and unique products below, do I have to knock the plane down directly? Or if I parachuting at high altitudes, I will lose one plane every time I stop moving forward?"

"Or find a landing site that can be landed at a distance of dozens of kilometers or hundreds of kilometers, and then walk to a major discovery site... I estimate that as long as the landing site is more than ten kilometers, I may get lost and lose my harvest."

Therefore, because we cannot land anytime, anywhere, fixed-wing propeller aircraft and gliders have been excluded from the options.

In the end, it seems that only helicopters are left, and there is a choice.

Xu Ming did consider buying a helicopter to speed up his exploration.

The helicopter can not only ensure speed, but also land at any time, meeting the needs.

But helicopters still have disadvantages, that is, no matter how small it is or how small the landing area it needs, even if it only needs a flat area with a radius of five meters, there are very few such landing places in the dense forests on the south side covered with plants.

Unless there is a helicopter that can be landed and parked on the tree, Xu Ming will place an order to buy it immediately and put it into use.

But there is obviously no such helicopter that can land on trees, and it still requires a flat ground with low plants.

However, compared with fixed-wing propeller aircraft that require a flat runway for taxiing and landing, it seems that helicopters are the best choice. And as long as you look carefully, there are still many landing sites in the dense forest, which may be within five kilometers, and you don’t need to land more than ten kilometers or dozens of kilometers away.

Even if there are some flaws, helicopters should be the best choice.

Xu Ming should buy one!

But not only did he not buy it, he found a better choice.

It can even be said to be the perfect choice.

A kind of aircraft device he is interested in is not only light and small, but also has a wide field of vision and no obstruction.

And most importantly, it can land anytime, anywhere, and the terrain requirements of the landing ground as long as his legs can stand firm.

It perfectly solved the problem of "landing anywhere", so that he could gain benefits through exploration.

This kind of aircraft is called a flight backpack.

The full name is "single-person jet-powered flight backpack".

This type of flight device was manufactured by a foreign inventor ten years ago in 2011. The main principle is to design the flight device into a human wearable device, install two miniature turbojet engines on the back (or bottom), and use gasoline to drive the working fluid to generate thrust, allowing people to stay in mid-air and perform various flight actions.

Xu Ming was not very familiar with flying backpacks. Until recently, he watched a military parade in Country F on B station. He saw hundreds of special soldiers wearing flying backpacks flying in an orderly formation flying backpacks flying over the air. He was shocked and became very curious about the flying backpacks.

But the more information you search online, the more you understand the flying backpacks, and Xu Ming knew that the commercial gimmicks of a product such as a flying backpack were greater than the actual significance.

Because it has a fatal disadvantage, it is its serious shortage of battery life.

The fuel the pilot carries is only enough for about ten minutes to fly.

Even if carbon fiber structural parts are used in large quantities and expensive fuel-efficient turbofan engines, the battery life is only about 30 minutes.

Then why not bring more fuel?

Because once the fuel is too much, the weight of the body increases again, it requires greater thrust, which consumes more fuel, so it is an unsolvable contradiction.

Therefore, even though many companies have launched commercial products, the commercial prospects of flying backpacks are still hard to say in the personal market, and they are just toys for a few enthusiasts.

However, in Xu Ming's eyes, the flight backpack is simply a perfect flight device tailored for him!

The gravity coefficient of a portable world is only 70% of that of Blue Star. If the weight is lighter, the battery life will naturally be greatly improved.

In addition, if the insufficient oil material affects the battery life, Xu Ming can open the space-time vortex and add the prepared spare oil by himself. In theory, as long as the oil material is sufficient, the battery life will be almost unlimited!

"Flying backpack, you have to buy one!"
Chapter completed!