1. O king and learned man, you are the doers of good of people and you give the people for their benefit the airship which is Vimanam and is seven wheeled and measures out the whole region of the earth and space and moves everywhere and which does not stir anything, which is in reality the form of materials harnessed by the mind equipped with five artifices.
2. O men of wisdom, the ship under your possession is without horse, without reins, three-wheeled, laudable and it moves in fermament. It is a very glorious and self-eloquent skill of yours that you give comfort to people on earth and in heaven.
3. O king and scientist, the artificial craft under your possession is falcon-shaped, comfortable, speedier than the mind of mortal, three-engined, and it moves hither and fleets like wind. Ye fulfil the need of people.
Here the mention of two old treatises dealing with the construction and operation of aircraft seems very indispensable. These two are the sama-rangana sutradhara of Bhoj’s time and the Viman Sutra of Bharadwaja of which few sutras with the commentary of Bodhanands are available.
There were written some other treatises on various subjects concerned with airship but they are not available in the present. The dates of the writers of these treatises are prior to Bharadwaja.
They are as follows :-
1. Vimanachandrika by Narayana
2. Vyomayanatantra by Shaunaka
3. Yantra kalpa by Garga
4. Yanavindu, by Vachaspati
5. Khetayana dipika by Chakrayani
6. Vyomayanarka prakasha by Dhundhinatha
Vimana means that which is of the shape of bird. Bharadvaja has accepted this basis in his Vimana Sutra. He has described various types of Vimanas. The word shenapatva of Rigveda occurring in the third verse quoted above, is extraordinarily remarkable.
In the aeroplane in ancient time mercury was used in the place of petroleum. This fact has been brought to our notice in the commentary of Yajurvedic verse (1-15) by great Swami Dayananda. It is not merely a fancy of his own. It has been very unequivocally accepted and described in the Samarangana Sutradhara. The mercury has been called as rasraja. The chapter of the author’s Hindi Book “ Shikshana Tarangini” pertaining to this subject may be referred to for knowing more on the subject.