There are three types of Vimanas mentioned in Vimana shasthra classified depending upon the importance: Maantrika, Taantrika and Kritaka. All these are described and designed by analysing the resources available in earth and also depending on the Human intelligence. Rukma Vimana is one of the kritaka Vimanas and it is similar to a rocket. Rukma Vimana had long vertical ducts with fans on the top to suck air from the top and send it down the ducts, generating a lift in the process. Utilization of electrical energy to operate Electro-Mechanical arrangement to enable vimana to lift off and accelerate Directional control is through conventional rudder system provided at the base.
Rukma Vimana main body
All the floors of vimana are 20 feet high, ground floor containing landing gears, electromagnets and wings. Whereas remaining floors are passenger cabins. According to Vimana texts, third floor is used as cockpit for pilots. There are goblet shaped cup like structures at the top of vimana in order to fix propellers or lift fans inside them to suck the air from top. Sun crystal is Dome shaped on the top of vimana third floor placed in centre of all the goblet shaped cups. There are four Wings of vimana around the circumference of the ground floor. There are slots provided for locating the Electromagnets in assembly. There are 8 propellers for Rukma vimana. Fan pipes: Wires run through fan pipes from 4 lift fans or propellers and are connected to motor at third floor of Vimana. 8 Mica pillars are located at ground floor of vimana, pillars are 20 feet long support from which third floor is constructed. There are 8 pairs of electromagnets arranged 45 degrees from central axis of each pair.
Main Constituent of Vimana
RajaLoha is used to make Rukma vimana. The term RajaLoha was used for the resultant material obtained by combining various metals and herbs. In order to protect from heat and radiations, the alloy was used for the bodies of various flying crafts in ancient times.
Rukma vimana extracts electricity from sun through sun crystal located at the top of vimana. Sun crystal absorbs more electricity from the sun when compared with modern-day solar panels. Hence it was more efficient and advanced than solar panels known to us. The 4 electrodes, electrolytes, acids located inside the sun crystal perform electrolysis process and supply to the motors of vimana through fan pipes in which electric wires are contained.
Tesla's works describe that excess electricity to an object will lift which is antigravity propulsion or levitation. Purpose of electromagnets in Vimana may indicate such type of propulsion. Tesla also worked on free energy concepts with the help of ancient Sanskrit texts. Vimana has motors and generators which is mentioned in vimana shasthra. Tesla's works on free energy generators and motors might give a clue on how the ancient ancestors tapped free electricity from ether. Free energy concepts have been neglected and avoided by many countries but recent invention from India describes free energy generator which gives more than 200% efficiency by taking power from vacuum.
Propulsion part of vimana is not yet decoded but after more research, modern humans may be able to reach it.