Citation explanation of wind angle

Good or bad depends on the five-tone occupation of four winds. "The Biography of Langyi in the Later Han Dynasty": "My father is a disciple, and the word is zhong Sui. Learn "Shi Jingyi" and be good at the wind star, six days and seven points. " Li Xian's note: "Wind angle means waiting for the wind in all directions in order to take advantage of good luck or bad luck." "Tongzhi Chen Jian Xuandi was built for three years": "Jihai, the emperor returned the power to the Queen Mother from Jinyang, and went to Ziyang, where he was hit by a strong wind. Scheler Weisanga learned the bugle and said,' There should be violence at once.' "Exposing Zheng Huchen in Mumian Temple": "There was a warlock named Fuchunzi, a bird with a good wind horn, who was recruited by Jia Sidao. He wanted to try his skills and asked about the past days." Notes on Cloud's "Six Chapters of Yuewei Caotang: Summer in the Sun": "When I was in Taiwan Province, there were different monks from eastern Guangdong crossing the sea, and their skills were unparalleled. They sit with bare arms and blades, like stone; It can also act as a wind shield. "

2. The sound of horns and flutes.

Tang Jia-dao's poem "Returning to the Han Dynasty" reads: "In front of the main temple of the Han Dynasty, the water is green and the wind angle is low." The second song of October 1st by He Jingming in the Ming Dynasty: "At dusk, the lights cry in the lane, and the wind angle starts to worry."

3. Wind direction angle WA: the included angle between the trajectory line and the wind direction line.

Positive and negative regulations: the left wind is positive and the right wind is negative;

Range: 0 ~180;

Commonly known as: WA 0, downwind; Wa 180, headwind or headwind; Wa+90, positive crosswind; 90 Washington, negative crosswind.