Just as Lin En thought, the high demands did not scare Lydia away, but rather made the halfling girl full of fighting spirit and looked at the design drawing carefully.
After learning that some light and tough materials are needed to make airships, Lydia immediately proposed that camel animal leather soaked in water and dried in the air can be used to make airbags for airships. This material is very satisfactory and usually used on the sails of large warships.
In the sea of fog, the sail of the warship they were driving was made of camel animal leather. No matter how big the storm was, it could not be destroyed. It was very durable and reliable.
The frame of airship air bag can be made of branches and trunks of Euphorbia fortunei, with high tensile, compressive and bending strength
Lydia gushed that she could not compare with Lynn in the field of aircraft design, but she was clear about the characteristics of various materials in different worlds.
Lynn silently calculated that if the materials were all made according to what Lydia said, the performance of the airship would certainly improve a lot, but the same cost would also become extremely high.
At least one hundred magic gold coins are needed
Lynn thought about his savings and couldn't help coughing twice, interrupting the girl's words. "In fact, this airship is just an experimental version, and it can't use such good materials, just a little!"
"How can that work? This is the first airship that can fly and turn in the sky." Lydia said with longing.
"I can only give you twelve magic gold coins as a deposit first." Lin En said reluctantly and took out a money bag, which was his few possessions. The only way to make up for the rest of the money was to have more students waiting for the Austrian math class, and then apply to Hurram for some teaching funds
Lydia shook her head, but did not accept it. Only the new knowledge Lynn explained to her was worth more than 100 magic gold coins. What's more, the airship was directly related to whether she could enter the Yieta School of Witchcraft.
"The money for making the airship is just like the tuition of the lecture. I will use the best materials to make it, and work from now on!" Lydia wiped the stains on her face and asked Darren to call the rest of the halflings in the workshop. She wanted to complete the production of the airship within a month.
Looking at the busy halfling crowd, Lynn was eager to help, but was stopped.
The use of magic may leave traces. It would be bad if Master Hurram thought that the airship was suspected of using magic. Besides, Lynn was a customer, and never let the customer do it himself.
In view of this, Lynn, who has nothing to do, can only be in charge of commanding on the side, watching those halflings who are only half as tall as themselves, carrying logs heavier than themselves.
……
The progress of airship production is faster than Lin En expected. After working hard for one night, the overall framework has been built for one sixth. If not a large number of camel animal leather used to make airbags needs special treatment and takes a lot of time, I'm afraid it will not take a month to build an airship.
However, such a rapid progress is not without cost. A group of halfling people are almost exhausted, and their enthusiasm has been put into work before.
Darren was lying on a solid board snoring. Lydia was even more exaggerated, sleeping directly on the frame of the airship, holding a beam tightly, with drool on her mouth, and muttering something from time to time.
Lynn shook his head. When he stopped a few halflings who were still busy, he moved Lydia and others to the house and let them all have a good rest.
After becoming a wizard apprentice, staying up all night had no effect on Lynn's spirit, so after settling down Lydia, who had fallen asleep because she was too tired, she left the workshop directly.
After a whole day, Lynn looked forward to whether the wizard apprentices had solved the exponential formula he left behind.
Push the door and walk into the classroom. A lot of coins and pennies collected are piled on the desk. To Lynn's surprise, the classroom that seemed a little empty in the last class is now full of people.
A rough sweep shows that there are as many as 150 or 60 people. If this classroom were not large enough, it might not be crowded.
Is an index game so useful?
"Good morning, everyone!" Lynn's mind was full of ideas, but on the surface, it didn't show anything.
However, the reaction of the students was more enthusiastic than he expected.
"Professor Lynn, are there any other Olympiad math problems?"
"I have worked out the number of 36 squares and 49 squares......"
……
Looking at the extremely excited wizards and apprentices in the classroom, Lynn was completely shocked. Could it be that the students of Yieta School of Witchcraft and Wizardry were all shaking their heads?
I have such enthusiasm for doing math problems
No, something must have happened that I don't know.
Lynn thought like this, but he was not eager to confirm. Instead, he turned to Ellock and asked. "It's been a day now. I believe you have the answer, haven't you, Ellock?"
"Professor, the sum of the thirty-six squares is 68.77 billion, 199.476 million, 77.35..." Ellock quickly stood up and replied trembling.
He has confirmed this number for many times and calculated 20 manuscripts, but the final amount is too large. He only has one chance to answer. If he makes a mistake, he will be killed.
Under Elok's worried eyes, Lynn nodded.
"Very good, the answer is correct."
"Have you figured out the meaning of the formula I gave you?" Lynn asked again.
"I have calculated that the sum of the squares is equal to two times of the last digit and minus one!" Ellock said confidently, and his lost confidence recovered after he had no debts of tens of billions.
Yesterday, in order to get the correct result, he spent the whole night calculating, and it was in the confirmation over and over that that he found the secret.
Lynn nodded again. It was barely qualified to find this rule in one day without much mathematical foundation.
"Professor Lynn, can I get the bonus?" Ellock asked expectantly.
Peirce and others looked at Ailock admiringly. It was a total of twenty magic gold coins. Although they had been counting for a long time yesterday, they were not as desperate as the other side and could not find this rule first.
Lynn naturally knew that Hurram set a reward for the formula he wrote, but because of the professor's reserve, he could not take it by himself.
But it is far from enough to get the money just by finding the law!
"Ellock, my summation formula is not that simple. You said that if I slightly modify the rules of the square game, for example, the number of the last square must be three times that of the previous one? Is your theory still universal?" Lynn asked with a smile.
The proud expression on Ellock's face froze, and he immediately figured it out in the center of his mind. Then he picked up a quill pen and wrote on the papyrus
"If you add another rule, you need to put 17 copper coins in the first box?" Lynn asked again.
Ellock completely collapsed, and his mind has been filled with massive numbers
This is too difficult!
He can't figure it out!
(PS: New books demand everything.)