GUNS N BALLS
Introduction
Ever felt fascinated by the primitive catapults and ballistae used by ancient Greeks and Romans? They were marvels of the time, pure applications of simple mechanisms that could literally bring down forts and bastions. Guns and Balls is an event that dares you to build a miniature gun that can hurl a ball using nothing but pure mechanical energy. A contest between different teams with different guns that make use of a variety of mechanisms, guns and balls promises loads of fun and competition. Can you build the ultimate siege weapon? Are you game enough?
Event Description
Participants are supposed to design and build a miniature gun that can hurl a ball. The mechanism of the gun should be purely mechanical. The ball’s diameter must be between 2cm and 7cm. Each round will test a different aspect of the gun. Accuracy (both horizontal and vertical), Range and Shooter/Participant skill.
EVENT ROUNDS:
·Range test is basically a qualifying round. Every participant is made to shoot into open air. A range less than 8 feet means disqualification. The gun gets a score proportional to its range. If ‘L’ is the horizontal distance traversed by the projectile, the score will be (L-8) x10.
·Accuracy is a requisite for any gun, so accuracy will be tested using a regular target board, as seen at target practice. Scores are taken evaluating accuracy for both stationary targets and moving targets. This test is basically about vertical accuracy. Score will be proportional to the proximity of the hit point from the centre of the board.
·X marks the spot/ Horizontal Accuracy Test: X marks the spot on the ground. The spot will be enclosed between four cardboard walls. The participants are supposed to hit the spot using their weapons. A full score of 100 will be awarded if the spot is hit i.e. the ball falls into the enclosure. Else, the score will be proportional to the proximity of the hit point from the spot. If ‘L’ is the distance from the X-mark to the hit point, the score will be (10-L) x10.
·Shooting stacked cans: Shooting stacked cans, is a common game at fanfares. The objective of this round is to test how good the participant is with his gun. The participants have to shoot at a stack of cans like the one shown in the fig. The score gets will be number of cans knocked down multiplied with 10.
·Innovative design will fetch bonus points. E.g. Auto-reload, use of efficient mechanisms, non-conventional mechanisms, simplicity of operation, etc. ELIMINATION CRITERION Elimination after any test will depend upon the number of participants, but it may not take place after every round. In case elimination is present, the lowest scorers till that round will be eliminated.
DISQUALIFICATION:
- If the participant’s gun cannot hurl the given projectile.
- If the participant tries to use other projectiles. E.g. darts, rockets, bullets, marbles, stones, etc.
- If the gun seems to be destructive or dangerous.
- If the gun makes use of chemical energy, combustion or electricity.
Problem Statement
Guns and Balls 2: Cannon Ball!
To find the best among the guns made by the participants, evaluating accuracy and functionality. Gun here refers to a purely mechanical device made by the
participants, which can hurl the given projectile at least to a distance of 8 feet without using any fire power, chemical energy or electrical energy.The ball should have its diameter in the range of 2cm to 7cm.
Rules
Team Specifications:
•Each team should consist of 2 or 3 members.
•Members need not necessarily be from the same college.
•No two teams should have a common participant.
•Every team member has to carry a valid ID of their respective educational institute.
•All the team members should register in the Technozion website.
•Team members cannot be changed after registration. Gun specification:
•The projectile must be a ball of diameter ranging from 2cm to 7cm.
•The mechanism used has to be purely mechanical. Combustion/fire power, electricity, chemical energy cannot be used. Springs, catapults, ballistae, elastic strips, mechanical transmission are some valid mechanisms.
•Trigger mechanism can make use of an electronic circuit, but this doesn’t mean electricity can be used for working mechanism.
Click Here to Download Registration Form..
Cash Prizes worth 
12,000 to be won !!