speaking of Vimana i found this online it describes the construction of a variety of Vimana's but dosent cover the metal mercury propulsion system which was said in other information to be a mercury boiler with a flame under it creates a power latent in the mercury and a pilot sitting in it would roar into the skies with the sound of thunder, it dose mention a mercury power system but dident cover the metal mercury propulsion nor did it give details of its construction and the translation here into english is even hard to read let alone pronounce and the amount of materials even others used with metals and mercury is very odd its such a big read i browsed through it looking for the propulsion details of which uses metal mercury and found none they may of kept it out but theres mention i think of other methods which if they use propellers is cheap and not very good as it then be like a low tech thing like propeller planes , some of the names for some of the materials used i wouldn't know if there even in the dictionary despite being translated to English and if you used a pc to look it up your most likely get a message or a error in the spelling cause the translated into English is so ridiculous in the spelling like as if your stuck in a gravity well with slow words and pronunciations coming from your mouth in trying to speak under the influence of that gravity well, and its a real nightmare to try and translate the meanings of the words used for the descriptions of the ingredients silicon and borax was easiest to read and understand and crystals but most sounds like gibberish and dosent make sense, and the mention of using herbs with metals and mercury sounds a bit stupid and fabricated but ill let the readers decide on this here, and they used monkey skins for wire insulation along with some oils sounds like something from the Fred flintstone era