The Vaimānika Śāstra is a 20th-century text in Sanskrit. It makes the claim that the vimānas mentioned in ancient Sanskrit epics were advanced aerodynamic flying vehicles.
Title page of the English translation of Vyamanika Shastra published in 1973
An illustration of the Shakuna Vimana that is supposed to fly like a bird with hinged wings and tail.
An illustration of Rukma Vimana
Vimāna are mythological flying palaces or chariots described in Hindu texts and Sanskrit epics. The "Pushpaka Vimana" of Ravana is the most quoted example of a vimana. Vimanas are also mentioned in Jain texts.
The Pushpaka vimana flying in the sky.
Sculpture of the Pushpaka vimana, as a temple flying in the sky.
Ravana rides his Vimana, Pushpaka.
Pushpaka vimana depicted three times, twice flying in the sky and once landed on the ground.