Donner's return to Misty Town was April 9th, which was the foggy period of late spring and early summer, and both Misty Town and Fog City were shrouded in thick fog, and people could no longer be seen from ten meters away, and the buildings a little farther away were like looming buildings in the sky. Pen & Fun & Pavilion www.biquge.info

After two months, more than 300 gnomes came to the town, and with the help of so many dwarf craftsmen, the windmill project in charge of the old craftsman Bruno has made a lot of progress, and now in the open space next to the town, several windmills shrouded in fog, on the basis of the slightly larger fan blades, the whole volume is more than half smaller. But at this time, there was no wind in Misty Town, so it was impossible to test the effect of the windmill's restructuring.

Middle-aged craftsman Mason's clockwork power project ran into a lot of problems. Before he could ask these questions, though, Donner had settled something more important - there weren't enough people in Misty Town anymore.

So just a few days after returning to Misty Town, Donner organized a big move in the fog, and all the dwarves and gnomes moved to Foggy City, except for a dozen craftsmen in charge of the windmill project, including Bruno, who remained in the town.

Gernada moved to the lowest streets of Foggy City, where Richard also moved as his student.

Wesley's knightly training was not improving, and he was herded out of the middle of Foggy City by Donner so that he could live closer to Gernada - if he hadn't claimed that he couldn't withstand the gravity at the bottom of Foggy City, Donner would have wanted him to live with Richard.

However, compared to Wesley, Lolita showed an unexpected stubbornness, preferring to stay in bed all day and vomit incessantly, and insisted on settling down at the bottom of Fog City.

The dwarf craftsmen who kept joining were all arranged by Donner in the middle of Fog City, near Ball Falls.

He himself, along with Unarela, moved to the top street at the entrance to Foggy City, the longest and largest stone chamber, where only the three of them were inhabited.

There are aqueducts and sewage ditches in Fog City, the former was built using Ball Falls and several underground water outlets (the street water used at the entrance of Fog City is led over the cliff by the small river that flows through Misty Town), and the latter is actually discharged directly down the cliff.

Therefore, there is no problem with drinking water and sewage in the city, the only problem is that after the fog city lost its commercial function, all the laborers were withdrawn, and no one sent food and all kinds of supplies to the city.

Donner hired farmers from the vicinity of Fog City to fill the void, and then plunged headlong into Mason's Clockwork Power Project in order to improve the efficiency of Fog City's shaft transportation as soon as possible.

Mason had already received a batch of clocksprings from the Far North, which were of various sizes, the largest one was nearly four meters in diameter and almost thirty centimeters thick, and even in the fully loosened state, it would have nearly thirty turns, and the smallest one was about forty centimeters in diameter and about six centimeters thick.

After witnessing Mason's demonstration, Donner was stunned - this alloy doped with trace amounts of mystical metal is extremely impressive in terms of strength, elastic limit, and fatigue resistance. Even if he doesn't use his brain to assist in calculations, he can see that the energy storage device made of this spring steel is comparable to a powerful battery pack, which is simply a pollution-free new energy.

However, Mason was clearly unaware of the value of this discovery, and he was still worried about the two problems he was facing.

The two challenges are:

First, the elasticity of the mainspring is unbalanced, the force is too small when it is relaxed, and the force is too large when it is tightened, so that no matter how much cargo is loaded in the cage connecting the mainspring, it is either faster and faster, or slower and slower, and the speed changes greatly, and it is easy to have accidents;

Second, because the weight of the goods or people transported each time is different, it is impossible to determine which size of spring to use, because the large spring has a large elasticity, when only some goods are loaded, the cage cannot pull the spring at all, and when it is loaded more, the spring cannot pull the cage.

After hearing this, Donner smiled lightly: "You just need to consider the comprehensive cost of these clockwork, in the case of cost and volume are not much different, the greater the elasticity and durability, the better." As for the two problems you mentioned, they are easy to solve. ”

Then, Donner took only a piece of paper and solved all of Mason's problems with a few simple strokes.

However, Mason's concept of moment was hazy, and he knew nothing about Hooke's law (strain is proportional to stress), so it wasn't until twelve days later, when he made a physical object according to Donner's design, that he was surprised to find that all the problems were solved.

Downer's design goes like this:

The larger the spring deformation, the greater the elastic force, and the sesame chain structure on traditional clocks is imitated (when the elastic force is the largest, the stress arm is the smallest) to ensure that the torque is always stable throughout the spring output process.

This stable output torque is then connected to a pulley with adjustable seven-speed arms (equivalent to a simplified version of a bicycle shifting flywheel).

In this way, when the external force changes within a certain range, it can be switched freely between energy storage (winding) and energy discharge (loosening spring) by adjusting the pulley arm, and the speed is not too fast or too slow.

Of course, when the clockwork "battery" is used as a shaft elevator, it also needs to take into account the stability of the start and stop, but this problem has been solved by Mason through manual operation and spring limiting.

Since then, Downer has made slight improvements to his scheme.

Finally, a month later, the first shaft elevator powered by a clockwork battery (a coinage invented by Donner) was successfully experimented in Fog City.

This purely mechanical mechanism, which was handcrafted by hundreds of gnome craftsmen for a month, was accompanied by a crunch of spring limiters and a long burst of applause and cheers from the upper and lower streets connected by the shaft, after transporting the first grain down the shaft and a dozen dwarfs automatically.

Every dwarf craftsman who witnessed this miracle blushed with excitement and excitement.

Although the cost of this clockwork battery is ridiculously high, it is undoubtedly a beacon in the dark for Donner, who is worried about power problems.

As long as the structure continues to be optimized, new materials are developed, and the planned fog city plant is officially put into operation, the cost of clockwork batteries will drop exponentially, and many problems will be solved at that time.

On May 20, the seventh day of service for the first clockwork elevator, Misty Town, which had been foggy for more than two months, finally ushered in its first sunny day.

On this day, everyone in Foggy City and Mist Town, including more than five hundred dwarven craftsmen, dozens of apothecaries and potion apprentices, Gernada, Wesley, Richard, Natia, and so on, all gathered in the clearing of the town.

In front of everyone, Donner personally presented the first Engineering and Technology Progress Award to the two dwarf craftsmen who invented the clockwork in this world and proposed the use of clockwork to solve the problem of freight.

When each got a hammer trophy with a base, both Bruno and Mason were a little embarrassed and seemed to be a little uncomfortable with the format. Especially when Donner asked them to say a few acceptance speeches in front of everyone, they were even more embarrassed and incoherent.

It wasn't until many years later that they realized that all the other achievements in their lives combined were far less than the weight of the first Tom Award trophy.

(Ask for a monthly pass!Ask for a recommended ticket!) (To be continued.) )