The Egg Rover project (March 2008)
Mission Objective: To design a safe and efficient ‘Lander’ that holds the precious payload- an Egg.

This project undertaken by the Aerospace Engineering students was inspired by the Mars Pathfinder launched in December 4, 1996 by NASA (National Aeronautics and Space Administration). This mission to explore the surface of Mars resulted in innovative technology in designing a Lander. A lander is a craft which holds the cargo of men and machine and lands safely on the surface of the planet. Mars Pathfinder featured an Airbag lander, which was built in a petal configuration and with 6 airbags covering each petal.
Picture courtesy: NASA
The airbags were inflated at an altitude of 300 m above the surface of Mars and released from the parachute at a height of 80 m above the surface. The airbags were designed to undergo impact force of 25 m/second and was expected to bounce atleast 12 m above the ground and soar 100-200m between bounces [1].

Picture courtesy:               NASA The Aerospace engineering students designed unique ‘landers’ and was tested for the quickest descent but at the same time also able to withstand the impact of the fall without destroying the egg. They were each dropped at a height of 27 feet, approximately 8 m above the ground. On an average they would have to withstand impact force of at least 5m/s.
Arif and His Parachute Assited Lander
A description of the designs: Arif's design was a made up of a styrofoam base which was hollowed out to place the egg. This base was attached to a plastic bag, which acts as the parachute, with the help of strings. Arif's model landed with the egg intact. Manjunath used a leather cricket ball which was split at it's seams and the inner core was replaced by cleaning sponge which held the egg in the middle. Both halves were later tapped together. Another design of his incorporated a plastic jar with a lid, the inside of which was stuffed with cleaning sponge. When tested, both designs failed to achieve the desired result.
Neelima used a bag of sand, with the egg secured in a tiny cardboard box and placed in the middle, another idea of hers was to place the egg between two cleaning sponge and securing the two halves. The sand bag design passed while the other one did not. Lakshmi used a bundle of hay with the egg placed inside the bundle and an empty tin can, with the top removed and the inside lined with cotton. Lakshmi's 'bundle of hay' design was a success. Muthanna's lander was made up of discarded rags. These pieces of cloth were bundled, with multiple layers tightly secured with the help of a twine. This design did not achieve the desired result. Later the designs were analysed for reasons for failure. While Manjunath's leather ball had a inner softer core of cleaning sponge, the sponge material itself was densely packed. Hence the impact energy traversed through the material and was transferred to the egg, thus breaking it. This was observed in the other designs which used this sponge material. Muthanna's design was made up of a bundle of textile materials wrapped one on top of the other with the egg in the middle, this design though very convincing initially turned out to be a surprise when it failed. The reason being that each layer was tightly secured. This tight packing did not help in dissipating the energy of the impact.

In the end, we had, five broken eggs and three winners-Lakshmi- (bundle of hay), Arif (parachute) and Neelima (sand bag).

I would like to thank the staff and students at R.A.T.E for the successful completion of this project.

Sincerely,
Prof. Balaji Aresh. M.Tech.
Senior Lecturer
References
Sports Meet
was organized at RATE, wherein student / staff participated in Cricket, Badminton, Table Tennis & Chess Tournaments. The students showed great enthusiasm and participated whole-heartedly in various disciplines. Some excellent sports men were identified amongst the students during this meet.