1. UTA010 : Engineering Design – II
Mangonel/Catapult Design Project
Alpana Agarwal
Copyright 2013-­‐2014
Electronics and Communication Engineering Department

2. UTA010: ENGINEERING DESIGN – II
L T P Cr -­‐-­‐-­‐ (6 self effort hours per week)
Course Objectives:
To develop design skills according to a Conceive-­‐Design-­‐ Implement-­‐ Operate (CDIO) compliant methodology.
To apply engineering sciences through learning-­‐by-­‐ doing project work.
To provide a framework to encourage creativity and innovation.
To develop team work and communication skills through group-­‐based activity.
To foster self-­‐ directing learning and critical evaluation.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

3. About the Project
The Project will facilitate the design, construction and analysis of a “Mangonel”. In addition to some
introductory lectures, the content of the students’ work during the semester will consist of:
the manufacturing and assembly of a Mangonel from a Bill Of Materials (BOM), detailed engineering drawings of parts, assembly instructions, and few prefabricated parts;
the development of a software tool to allow the trajectory of a “missile” to be studied as a function of various operating parameters;
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

4. About the Project
a structural analysis of certain key components of the Mangonel for static and dynamic stresses using values of
material properties which will be experimentally determined;
the development of a micro-­‐electronic system to allow the angular velocity of the throwing arm to be determined;
testing the Mangonel;
redesigning the throwing arm of the Mangonel to optimise for distance without compromising its structural integrity;
an inter-­‐group competition at the end of the semester.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

5. Course Learning Outcomes (CLOs)
Upon completion of this module, students will be able to:
model trajectories of masses with and without aerodynamic drag;
develop a software tool to allow trajectories be optimised;
analyse the static and dynamic stresses of elements of an engineering mechanism;
optimally design structural elements of an engineering mechanism;
perform a test to acquire an engineering material property;
develop and test software code to process sensor data;
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

6. Course Learning Outcomes (CLOs)
design and construct and test an electronic hardware solution to process sensor data;
construct a Roman catapult “Mangonel” using tools, materials and assembly instructions;
operate and evaluate the “Mangonel” for functional and structural performance;
validate theoretical models by comparison with experiments;
integrate skills to innovatively redesign an element of the “Mangonel”;
participate and cooperate in a team.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

7. What is Catapult/Mangonel?
Used in the medieval period to throw projectiles at a castle's walls
Types – Siege, Mangonel and Trebuchet
The mangonel threw projectiles on a lower trajectory and at a higher velocity than the trebuchet, with the intention of destroying walls, rather than hurling projectiles over them. It was more suited to field battles.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

8. What is Mangonel? Mangonel is derived from the Greek
mágganon, meaning "engine of war”
But mangonel may also be indirectly referring to the mangon, a French hard stone found in the south of France.
The Arabic term manajaniq comes from the same word, and applies to various kinds of trebuchet.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

9. Proposed Lecture & Lab Content in ECED
S. No.
Week
Lecture
Laboratory 1.
Week 2 / 7
EL1: Introduction to
Arduino
EP1: Intro to Arduino Interface 2.
Week 3 / 8
EL2: Writing Digits on 7-­‐seg
EP2: Software 1 3.
Week 4 / 9
EL3: Introduction to Logic Design
EP2: Hardware 1 4.
Week 5 /10
EL4: Writing Algorithms for Mangonal
EP2: Software 2 5.
Week 6 /11
Integrating the Complete Hardware
EP2: Hardware 2
Copyright 2013-­‐2014
Alpana Agarwal, ECED 10
14/01/16 14:40

10. Mangonal Project Alpana Agarwal, ECED 14/01/16 14:40
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

11. Evaluation Methodology
L T P (with 6 self effort hours)
Electronics + Mechanical
Electronics( E) 30
Assignment - I      (5 marks)
Assignment - II     (5 marks)
Assignment - III    (10 marks)
Final Integrated Demonstration and Viva    (10 marks)
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

12. Work Methodology Teams of 3-4 students.
Each Team to bring their Laptops (preferred)
Download and install Arduino Software.
One Arduino UNO R3 board to be bought by each group
Other items Logic chips, Resistors, wires will be provided. If you bring your own items, you may take it away as well.
Each student will make an file and submit it.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

13. Books Text Books: Reference Book:
Michael McRoberts, Beginning Arduino, Technology in action publications.
Alan G. Smith, Introduction to Arduino: A piece of cake, CreateSpace Independent Publishing Plaporm (2011)
Reference Book:
John Boxall, Arduino Workshop -­‐ A Hands-­‐On Introduction with 65 Projects, No Starch Press (2013)
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

14. Problem Statement
To construct a circuit which will record and display the length of time taken by the throwing arm on the Mangonel to pass between the sensors mounted on the chassis.
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40

15. Thank You
Copyright 2013-­‐2014
Alpana Agarwal, ECED
14/01/16 14:40