All in the shape
- POSTED ON: 22 Jul, 2023
- TOTAL VIEWS: 151 Views
- POSTED BY: Jagadeesh Kanna | Article by R. Krithika
- ARTICLE POINTS: 150 Points
After listening to the various versions of the rabbit on the moon story, Hanuman tries to create a map of the world using rabbits and pebble leaves, as Vaayu watches. Hanuman then has a question.
Hanuman: How is it that Kesari is my biological father and you are my celestial father?
Vaayu: It’s a multi-layered story. Your mother, Anjana, is an incarnation of one of the apsaras from Devaloka. Due to a curse by Sage Durvasa, she was born as the daughter of King Viraj.
Hanuman: Why did Durvasa curse her?
Illustration: Sahil Upalekar
Vaayu: She was a very talented and beautiful apsara. She distracted Durvasa by moving around. So he cursed that she would be born as a monkey on Earth. Your mother pleaded with him to temper the curse. When he calmed down, he explained that he couldn’t take it back but she would be relieved from the curse once she gave birth to a very powerful being.
Hanuman: What happened next?
Vaayu: Wait! This is just the beginning. When Anjana grew up, she married Kesari, the king of Sumeru Parvat. For a long time, they didn’t have children so they prayed to me to bless them with a child.
Hanuman: So where is the science here?
Vaayu: I am coming to that. Around the time, your parents were praying to me, King Dasaratha of Ayodhya was performing the Putrakameshti yagna. At the end, Agni appeared and gave him a special pudding. He distributed it to his wives Kausalya and Kaikeyi but, as he was turning to give it to his third wife Sumitra, a bird came out of nowhere and snatched a portion of the pudding.
Hanuman: Where di a bird come from now?
Vaayu: Again, this bird was an apsara under a curse. To regain her form, she had to help in the birth of a powerful being. So, the bird took the pudding and began flying towards the Kishkindha mountains. As she got there, she began to regain the form and the pudding began to drop.
Hanuman: Oh! So, what happened next?
Vaayu: You have already learnt that everything below 85-100km gets pulled down by gravity and most items burn up during free fall in high speed.
Hanuman: Like meteors and meteorites.
Vaayu: Exactly. So, I had to create an aerodynamic shape that would ensure the pudding would land safely in Anjana’s hands without burning up.
Hanuman: Wait! How is that possible? Can you show me?
Vaayu takes a bowl of water and throws it up. As the water begins to fall, Vaayu sends a heavy gust of wind in its direction. The water takes on the form of a teardrop. Vaayu then freezes it.
Vaayu: This is one of the most aerodynamic shapes in Nature. The air molecules, our Vaayusena, create an air shield to gain that shape. (Refer Episode 3 and Episode 4) We can change the direction by changing the angle of attack.
Illustration: Satheesh Vellinezhi
Hanuman: What does angle of attack mean?
Vaayu: Angle of attack refers to the angle at which the wind hits an aerodynamic body with respect to its centre of axis or reference line.
Hanuman: And how is this applicable in the human world?
Vaayu: All aircrafts, re-entry vehicles, reusable rockets will use this idea.
Hanuman: Okay. Let’s go back to the story. What happened after the pudding fell.
Vaayu: After I got the pudding to land safely in Anjana’s hands, I told her to eat it. You know the rest.
Hanuman: What happened to Queen Sumitra?
Vaayu: The other two queens shared their portions with her.
Hanuman: Who were those children?
Vaayu: Kausalya’s son was Rama, Kaikeyi’s was Bharata and Sumitra gave birth to the twins Lakshmana and Shatrugana.
Hanuman: Can you tell me more about them?
Vaayu: You will learn in due course, Hanuman.
The author is the founder and CEO of Vaayusastra Aerospace, an IIT-Madras incubated ed-tech startup that offers Air Science workshops for children between five and 14 years.
Now that you have read Hanuman’s story, here is an activity for you. The flower grid below is made up of the word AEROSPACE and hides a list of 30 words that can be made from these letters. How many words can you find? Remember, these are all seven, six and five-letter words.