Jia Yi came to the front of the pendulum, first measured the length of the pendulum, there was no accident, and the previous measurement has been, it is the calculated length of a single pendulum for one second.

The gravitational coefficient of various places on the planet is not consistent, and the pendulum length of the pendulum clock of the Jiayi Chamber of Commerce is actually only a maximum common divisor, and when it is actually used in various places, if the pendulum time is not accurate, the pendulum length can be manually adjusted. The length of the pendulum here in the academy is recalculated after re-measuring the gravitational coefficient, which is much more accurate.

However, even if this is the case, no one dares to guarantee that it will be accurate in a certain time, first, the calculation results of the pendulum theorem are only approximate values and are not very accurate, and secondly, there are various external factors, which cannot be ideal. For example, in order to counteract the effect of air resistance, the pendulum is relatively heavy.

Almost everyone has heard of the butterfly effect, where small changes in initial conditions can have a huge long-term ripple effect on the entire system. This is not to say that there is one variable that necessarily causes a huge ripple effect, but it is much more than a butterfly flapping its wings that affects an object.

The same is true of the pendulum, even if the best efforts are made to achieve the most ideal conditions, it is not possible to completely remove the interference, the season, temperature and humidity, geomagnetic deflection, and even the installation of the province is a kind of interference, which can only be approximated.

Therefore, on this pendulum system, there is also a device to adjust the length of time, there is a knob, each rotation, you can adjust the speed or slow about 0.2 seconds, a whole day 0.2 seconds. The attic at the top of the tower has a sundial, which is used to calibrate the time.

After the completion of this clock tower, it is estimated that people will be indispensable to maintain it, although there is no need to wind it, but at least it will have to come over every once in a while to calibrate the time.

After Jia Yi checked the pendulum, the rest of the people also checked the gear structure, mechanical transmission structure, magic transmission structure and other parts.

After handing over the results of his examination to Husley, he went to the attic at the top to watch the teachers install the huge bronze bell. In fact, it can also be called a golden bell, not a metal is gold, because these bells are doped with gold for casting, and the so-called 8K and 9K gold gold content is only 20% or 30%, and the gold content of these copper bells will not be much lower even if it is lower. At least, there are always 2 or 3K, so the gold used up in these few hours will be measured in tons.

Thinking about it, it is really proud, coupled with the more precious magic metals mixed in it, Jia Yi feels that his financial resources are reluctant to make such a "golden bell", and he is afraid that he will not go bankrupt if he comes to a few more. (Calculate, two or three hundred million yuan per ton of gold, these five bells, the price of gold alone is at least more than 1 billion RMB, is it too expensive, MD.) ）

Kaichi walked up to Orlando and asked, "Teacher, does this main clock have any special effect?"

The last time I asked McCree about them, they had a bad taste, and they mysteriously refused to say, and now they happened to meet Orlando, and their relationship was more intimate, so I just asked. Orlando should have suffered a bit of a loss last time he came back, and he has been recuperating at home without receiving anyone, and this is the first time he has been seen since then.

However, Jia Yi still thinks too beautifully, these teachers estimate that they have been working together for a long time, and they already have a tacit understanding with each other, and even the bad taste is almost the same.

Orlando asked, "Didn't you ask McCree about them? The magic array of the main clock needs to be connected to the magic network of the elemental pool, otherwise it can't be activated, and he won't try it without trying, right?"

Jia Yi said: "I tried it, but it was Mr. McRae himself who tested it, and we were not there, and he didn't say anything about the magic effect of the main bell when I asked him, only that he would see it later." ”

"Then you say wait. Orlando didn't care at all that it was his own disciple on the other side, and gave the same answer as McRae, "There will be no surprise if you know too early." Didn't you look at the circle inside the clock yourself? didn't you see anything?"

"Nope. Jia Yi shook his head, "Mr. McRae has always kept the bronze bell, and I have seen it once. ”

After saying that, Jia Yi looked at McRae, as if he was hitting him in front of him.

McRae smiled as he looked at the inspection report that Husley had put together, and said, "This is a surprise for you, and you will know what the effect will be when it is officially used." ”

Kaichi felt that his curiosity could not be satisfied, and he stopped talking, lest the more he begged, the more proud these teachers with evil tastes became.

The bells were quickly installed, and five huge "golden bells" hung upside down on the top of the tower, because the top of the tower was an attic supported by pillars, and there were no walls, so that even under the tower outside, these bells could be seen, these bells were all new, and the surface was glowing with bursts of precious light, and there was a feeling of golden light shining in the sun, but it was not as dazzling as the sunlight reflected by the mirror, but it appeared soft.

Thanks to this is a magical world, otherwise Kaichi would have doubted whether the top of the tower would be able to hold up with such huge bronze bells hanging on the top of the tower. These five bronze bells add up to at least 5 or 60 tons, even if it is a modern concrete structure in the previous life, it is estimated that it must be a steel frame beam to be able to withstand it, otherwise after a long time, the roof will definitely not be able to withstand the collapse.

"Hughesley, Passerbai, you take someone down the outside seconds hand, and we'll start running the whole system and see how it goes. McRae commanded.

Moore asked strangely: "What are you doing when you drop the second hand? Are you afraid of running out of power?"

"I guess I'm afraid that the second hand will be too big, and it will be seen that the clock tower has started to run. Orlando knew a little more about McRae and spoke his mind.

McCree turned around and gave him a thumbs up, then went to calibrate the time, and by the way, canceled the switch to ring the bell, this system is very complicated, even the control of the bell is divided into many kinds, each clock has its own set of controls, control when they ring the bell, a few rings, each bell can be turned off individually.

Canceling the second hand has nothing to do with Kaichi because he can't fly. When the second hand was designed, I considered whether it was not necessary, because the outside hand is very huge, and the second hand is about 5 meters long, which is very heavy, and if it continues to run, the power requirements are very huge. But fortunately, we have magical power, and there is a whole small elemental pool behind us, and the energy is constantly flowing, so we keep the second hand.

Soon, Husley and the others returned to the room with a few thick hands, and McCree activated the calibrated pendulum clock.

Although the elemental pool is connected, there is no sound and light effect, only the sound of the gear clattering can be heard, and with the swing of the pendulum, the whole system begins to run. Although there is no minute hand, the part that controls the minute hand is still rotating, and Jia Yi is in it, and they can directly observe the gear that controls the rotation of the minute hand, and everything is not half a deviation from what was expected, and the whole device has actually been rehearsed several times when it was underground.

With the swing of the pendulum, the escapement begins to click the cycle to release the gear, the gear through a power amplification device, the force on the gear is amplified, and then transmitted to the end of the gear structure, the end of the gear structure controls three hands, the second hand is divided into 60 grids, rotates once per second, and then triggers 60 seconds after driving the minute hand to rotate, but every 1 square rotation of the minute hand will drive the hour hand to deflect a little bit, until the minute hand turns 12 squares, the hour hand rotates one square.

Everyone stared at the system, and brought a magic hourglass timer, until half an hour passed, the pendulum clock system has been very normal, there is no problem, and there is no deviation from the magic hourglass's time, at least, it is not visible to the naked eye. I also compared it with the sundial on the roof, and there was no problem, at least, in this 30-minute time, the timing was still very accurate.

McRae glanced at the spinning gear, then looked around and said, "We've made it, set the second hand right now, and wait until 12 o'clock, and the clock will be officially started." ”

Kaiichi breathed a sigh of relief and looked at the rest of the people, everyone's eyes were full of joy, but they all restrained themselves and did not cheer.