How did the protagonist obtain the new engine technology in the novel?

I don't know who Bunta of Mount Haruna is. The engine was a complex technology that involved many aspects of knowledge and skills, including computer science, mechanical engineering, electrical engineering, and so on. If you want to get technical details about the engine, you should consult relevant technical documents, books or online tutorial or consult professional engineers or technicians.

I recommend " The Life of a Winner in the City " and " The Pioneer of Super Technology " to you. Both of them focus on acquiring extraterrestrial technology. They are about the protagonist who, with the help of black technology, goes from an ordinary person to a winner in life and a pioneer in super technology. I believe you will like these two novels that are full of technology, passion, and struggle. I hope you like my recommendation.😗

😋I recommend the following two novels to you: 1. "Trading Space Battleships at the Beginning". The protagonist obtained a trading platform 3,000 years later and traded for a space warship to help mankind calm down before the alien invasion. This sci-fi novel is very suitable for your needs. 2. My Universe Super Battleship. The main character discovers a space warship in his own orchard and uses future technology to create more powerful warships and space fleets to help the country become stronger. This sci-fi novel about interstellar civilization is also very suitable for your requirements. I hope you like this fairy's recommendation. Muah ~😗

This was the novel "Super Fish Cultivation System." The male protagonist, Xu Xinghe, wanted to earn money to improve his life and treat his sister's illness. He decided to go fishing in the sea. Then, he obtained the bead in the mouth of the divine turtle. After that, he could go into the sea and move freely, starting his own life of raising fish. I hope you like this fairy's recommendation. Muah ~😗

In "My Left Eye is the Magic Eye," the protagonist obtained superpowers by copying them. In "Pokémon: I signed in to become a god-level cultivator," the protagonist obtained superpowers through the check-in system. In "Become Strong with Likes," the protagonist obtained superpowers by liking a great existence. In "Battle Break: Twinkle Aroma into a lover while she's still young," the protagonist obtained superpowers by helping others. In "Be Careful of Your Superpowers", the protagonist obtained superpowers by collecting ability cards of mutants and superhumans. In "Awakening Superpowers from Watching TV Series", the protagonist obtained superpowers by watching TV Series and acting in the characters in them. In "I Have Infinite Superpowers", the protagonist obtained immortality after transmigrating and began to awaken superpowers. In "The Journey to the Other World of the All-rounded Master of Dungeon", the protagonist obtained superpowers through the cards of the game and the debt king system. In "Survive in the Other World to develop superpowers", the protagonist converted hostility from destroying enemies into attribute points; in "The Whole World Will Help Me Become a Savior", the protagonist gained power through the golden finger that gained strength from fear; in "Master Planter in the Other World", the protagonist gained power by cultivating grass and flowers; in "Nine Cauldrons God", the protagonist gained power by gathering nine cauldrons and refining his body to become a god. I hope you like this fairy's recommendation. Muah ~😗

An urban novel in which the protagonist obtained alien technology, futuristic technology, or technology from an unknown advanced civilization was as follows: " Master of Superpowers ": The protagonist, Li Mo, was an ordinary college student who obtained a mysterious ability-" Time Control " in an accident. From then on, he began an unusual life. He displayed his superpower in the city and became a superpower master in the eyes of everyone. In this process, he made many like-minded friends and encountered many challenges and difficulties, but in the end, he successfully realized his dream and became a great master of superpowers. " Future City ": The protagonist, Chen Hao, was an ordinary young man who obtained a futuristic technological device--a time machine--by chance. From then on, he began a journey through time and space to find his future in the city. In this process, he met many different people and things, experienced many thrilling adventures, and discovered his dreams and goals. In the end, he successfully realized his dream and became a great leader.

😋I recommend the following two urban novels to you: 1. The protagonist was reborn in 1992 and integrated with the technological system created by the Martians. He quietly sowed countless aerospace seeds, and China's aerospace industry rose rapidly. The protagonist became a master of aerospace, surpassing all the aerospace masters. The journey of China's aerospace industry also became the sea of stars. It sounded very interesting, and it wasn't long. 2. <<Rebirth: Lighting up the Technology Tree>>: Chen Chumo was reborn after the Solar System was destroyed by an unknown alien civilization in the year 2200. He had finance in his left hand and technology in his right. Climbing the technology tree and leading China to become a level 1 space civilization. Compared to the first book, the protagonist in this story had the support of the mysterious system, which was very attractive. I hope you like this fairy's recommendation. Muah ~😗

I recommend the novel,'City Miracle Doctor: Become Stronger When You Sign In' to you. The male lead was a hard-working medical student who improved his medical skills by accumulating experience points to exchange for skills. Even the elders of the medical world were amazed by his ability to accurately judge the condition of a patient. He seemed to have the ability of a divine doctor. I hope you like my recommendation. Muah ~

The book "After the Fighting Spirit Becomes a System" fit the description of the problem. After the main character became a system, he could copy skills, but every time he failed a mission, he had to start over. He could even turn the damage he received into cards and use them in battle. I hope you like my recommendation. Muah ~

It was " I Can Summon the Fierce Generals of History ". The main character, Zhang Yang, had accidentally obtained the mystical system. He had obtained a special ability because of a stone, and had begun his legendary life. I recommend this novel to you. I hope you like my recommendation.😗