The Image displays the 'Pushpaka Vimana' belonging to King Ravana
Vimanas are flying 'chariots and palaces' described in the Hindu texts, Sanskrit epics and Jain texts.
This would have been a good interpretation at the time for something that would have been described by word of mouth.
...that aerial and excellent Vimana going everywhere at will, that chariot resembling a bright cloud in the sky
It is described as taking off into the sky
...the excellent chariot at the command of the Raghira, rose up into the higher atmosphere.
