Chapter 726: Encounter with a Polar Bear
Bifang was very active. After a short rest, he started the "wall" plan.
It’s actually very simple. Just dig a ditch around the cabin and then sprinkle a mixture of ice water and sawdust.
Under extreme temperatures, the mixture freezes into ice almost instantly, quickly forming an unbreakable wall.
"Ice is a solid substance formed by water. It is well known that thin ice breaks like glass when touched. However, many people do not know that ice is as hard as steel and as solid as concrete."
"It's actually very simple to achieve this goal, just add some sawdust into it."
"Ice cubes plus sawdust may sound a bit nonsensical at first, but it actually has a professional name, called Parkrete, which is a type of composite material, just like reinforced cement, which is a combination of cement and steel bars."
The audience didn't know what Pakrite was, but as soon as Bifang mentioned steel bars and concrete, everyone had a clear concept.
[What kind of pie can be compared with cement? ]
The audience was a little bit unconvinced. How could ice and wood be as hard as cement?
"If the conditions are right, it is indeed possible." Bifang once again made a surprising statement.
"Pycrat is a composite material made of approximately 14% sawdust or other pulp by weight and 86% ice by weight."
"During World War II, the Allies mixed wood fibers with water and froze them. The wood fibers formed a wood layer that made the ice difficult to melt. This hardened ice was as strong as steel."
"An inch, or 2.5 centimeters, thick ice can support the weight of six people; a 10-centimeter-thick ice can stop bullets."
"This type of ice sheet was invented by the Central American Jefferson Pike, so the Allies named this ice compound 'Pikerite'."
After Bifang's explanation, the netizens also understood how awesome this composite material with a strange name is, and also learned about its glorious history.
During the Second World War, as Germany continued to sink transport ships, the Allies had always wanted to build a ship that could not be destroyed by artillery shells, bombs, and mines. "Pykret" became the ideal material for shipbuilding.
Later, the Allies used "Pykrit" as material and vacuum-built a small transport ship 60 feet long and 30 feet wide. It sailed on the water at 60 degrees Fahrenheit for several days without melting.
That's 60 degrees Fahrenheit, which is equivalent to 15 degrees Celsius, which is basically the water temperature during the transition from spring to summer. It's outrageous that it .
After the end of the two world wars, the "Pakret" ship was no longer built, but it was also used as an anti-tank obstacle, which was often seen in Soviet textbooks published in the 1940s.
During World War II, China also launched a Habakkuk Project, which planned to build an aircraft carrier to deal with German submarines in the Atlantic.
However, when the test ship was being built in Canada , it was discovered that the composite ice material could not support its own weight on the large hull. In addition, there were differences in the design of the power part, so the construction plan was terminated in 1943. Even so, the abandoned hull was not completely melted until three years later.
Of course, such behavior still seems ridiculous today, but a hundred years ago, someone did try it.
Hearing is not as good as seeing. Bifang raised the stone hammer in his hand and smashed it directly on the solidified wall. With a dull sound, some broken ice on the surface fell off, and the wall remained intact.
[Damn, bullfrog]
[Looks hard]
The wall was built very quickly. In just two days, Bifang had enclosed the entire wooden house, with a height of 1.6 meters.
At this height, polar bears can only crawl over, and wolves can jump, but it is only enough to stop their charge and launch a counterattack to a certain extent.
All in all, I feel very safe.
Another week passed and the wolves did not return, so Bifang finally gave up and continued riding his dog sled around Greenland to see if there was any prey or to enjoy the Arctic scenery.
Feeling the violent jumping of salmon, tracking the magnificent migration of reindeer, and meeting various animals and environments that you could never understand in the city, all the audience's yearning for Greenland is satisfied.
This kind of days continued until late December .
At this time, even Bifang himself couldn't quite remember how many days he had survived. It might be more than sixty days, or it might be more than seventy days. In short, there was probably only one month left before the end of his survival. Perhaps before the end of his survival, he would see the sun rise again.
In this situation, Bifang finally encountered another heavyweight predator in Greenland - the polar bear.
Perhaps it cannot be said that they finally met. Bifang had met several times before, but they just looked at each other from a distance and never met so closely as today.
"What a coincidence."
Bifang's whole body was stiff. He didn't dare to move at all at this moment, because there was a huge monster lying more than 20 meters in front of him.
At first glance, one might think it is a small hill made of dry snow, but everyone sees the big head under the hill.
This was a chance encounter.
Bifang's original target was an Arctic rabbit, but something unexpected happened. An Arctic fox suddenly jumped out and scared the rabbit away.
The Arctic fox was an Arctic fox, and Bifang didn’t mind. It followed it until it came right behind the polar bear. By the time it discovered the polar bear, the distance between them was only more than 20 meters.
The man and the bear were almost staring at each other.
This bear is not the skinny one shown in the photos taken by the animal protection organization. On the contrary, it is a strong man.
Because it was lying on the ground, Bifang couldn't see how long this thing was, but judging from its height, its weight must be at least over 500 kilograms!
The only good news was probably that the six idiots did not follow more people. Their hunting ability was limited, and bringing them along would only scare away the prey. Bifang tied them to an ice mound not far away, so there was no need to worry about them being eaten by a bear.
In the summer, when food is plentiful, the Arctic fox stores some of its food in its den.
In winter, when the food stored in the den is exhausted, the white fox will stalk the polar bear and pick up the leftovers.
So in winter, there are always 2 to 3 white foxes quietly following the polar bear. Of course, if the polar bear is very hungry, it will also attack the Arctic fox.
Bifang suspected that he was encountering this situation.
The color of the polar bear is almost the same as snow. If you don't pay attention at night, it is easy to be overlooked. Bifang himself was also caught in the trap without knowing it. If he hadn't been suddenly awakened, he might have been much closer.
In a flash of thought, the polar bear moved!
