Who said it was a chariot? I think you are linking some "flying chariot" from other text to "vaayu yaan" from some different text. "vaayu" means "air" and "yaan" means "vehicle". This is far more specific that "flying chariot".
> And every chariot carrying the Moon a lunar lander?
Just curious, isn't carrying a Moon very different from landing on the Moon? Equating "carrying a Moon" to "landing on Moon" does not even mean same thing, so that can be thought as extrapolation. But the more specifics of "using vaayu yaan" to travel on earth from Lanka(which exists today) to Panchavati(which also exists today) does not need the extrapolation as was required in the previous sentence.