BALLOON HELICOPTER | Bengali
Channel: Arvind Gupta
Date: 01/12/2015

This Balloon Helicopter is perhaps the greatest flying object. This is a ready made toy. There are 3 blades, a rotor, a balloon and a socket. This is the ROTOR with the whistle. Enjoy the whistle. 
This is the BLADE. The air goes in through the PINK port and comes out from a thin hole near the wing tip. The three blades can be attached one-by-one to the central ROTOR. You can see that all along the length of the blade there is a tube which ends in the hole near the tip of the blade. From the hole the air EXITS.
This is the SOCKET. Attach the blue socket to the balloon. Then inflate the balloon with your mouth. Fix the socket along with the inflated balloon to the rotor. 
Now leave the helicopter in the air with the balloon down. Air will escape from the balloon and turn the wings and the Helicopter will take off with a whistle. After some time it will come down. 
See this amazing toy once again in operation.

This work is supported by IUCAA (www.iucaa.ernet.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar, Pratham, Krishnanjan Mondal TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org