Subhanjan Saha is a 21 year old boy from Kolkata  who has built an Unmanned Aerial Vehicle (UAV) popularly known as Drone. As per Wikipedia, Drone  is an aircraft without a human pilot on board. Its flight is controlled either autonomously by computers in the vehicle or under the remote control of a pilot on the ground or in another vehicle.  The Drone built by Subhanjan is three metre by one metre in size.
Saha, a 21-year-old computer science student of Manindra Chandra College Kolkata, who apparently got inspired by  inspired by Joy Lobo’s flying spy camera in Movie ‘3 Idiots’ by Aamir Khan.
Subhanjan has written to the Defence Research and Development Organisation
Subhanjan Saha with his Drone
(DRDO) and the Bangalore-based Hindustan Aeronautics Limited (HAL) to fund and help upgrade his drone so that it can be deployed for the country’s defence and in other spheres.
“I have written to the DRDO and HAL, but there has been no positive response yet. It’s built from basic materials but is capable of camera surveillance, weather forecasting, attack and defence and much more..only if the authorities can fund the upgradation”.
“I want it to be used for the country’s benefit,” Saha emphasised.
Daubed in the colours of the Indian flag – saffron, white and green on the sides – the drone, which resembles an aircraft, was engineered by Saha over a span of four to five years.
Built with scrap metal, pieces of plastic and cheap Chinese-made contraptions, it packs enough power to fly 10km at a stretch at a height between 5,000-10,000 feet, take clear ground photographs with a high-resolution camera and instantly relay them back to its operator
“It is powered by rechargeable batteries and is eco-friendly. At a stretch it can go on for 40 to 90 minutes with an average of 60 minutes. If I get help from the authorities, then it can be transformed to function longer,” explained Saha, who was born at Kalna in Burdwan district.
The  electronic components used in Drone have been sourced from abroad via online orders.  “The electronic parts are very expensive in India. So I got a friend to help me out with net-banking and placed orders online,” Saha said.
He has been scrimping and saving through all these years to finance his drones. At the last count, he has four other aerial vehicles in stock.
“I used to save the money that I got from winning various competitions over the years. My earnings from giving tuitions also contributed to the budget that stands at Rs. 80, 000 to Rs.1 lakh per drone,” said Saha whose father is a weaver. Guiding Saha in his efforts is the NGO Prantakatha and Abhijit Mukherjee of the S.N. Bose Centre for Basic Sciences.
“We provided Saha with the email ids and other contacts. He has been writing to them. A lot of individuals and organisations have shown interest in helping him but so far we have not received any response from the government agencies,” Bappaditya Mukherjee of Prantakatha said.
“We are trying to open a dialogue with the central government but if it does not respond, we will go with the private agencies,” Saha said