HONORS ENGINEERING DESIGN
“Junk Draw Wars”
Problem: You need to construct one transportation vehicle out of the materials that you have in your shoeboxes and only those materials. The vehicle will start at the top of a ramp and travel the distance of the ramp onto the floor and will cross the finish line. It will not hit, touch or crash into the wall after crossing the finish line. It must have some type of stopping mechanism either built on the vehicle or a separate entity (it cannot be built on the ramp)– no human intervention is allowed and neither is putting junk, a shoe box etc. it must be a well thought out idea and creation. The vehicle must not be damaged and must travel the angled downward length of the ramp. It must be built in class – cannot be taken home or any addendum materials brought in or taken from class, school etc. Science (physics) and math principles must be included in your designs for each the vehicle and stopping mechanism and calculated in your documentation work.
Course Dimensions
Ramp – 105 degree angle at (seven) 7’ in length, 32” height at where it attaches to the column support.
- 7’ length – cannot be changed
Distance between the ramp and the finish line is (six) 6’.
Distance between the finish line and the wall is (three) 3’. The finish area is 4’ wide (across). So it is a 3’ x 4’ area. Use masking tape to lay out on the ground
Design Brief
People: groups of 3
Per 4 (#18) – 6 groups of 3
Per 5 (#15) – 5 groups of 3
Class Meetings – Five (5) class periods (one day for brainstorming)
11/22 – 23 brainstorming
11/28, 11/30,12/1, 12,2 – building
Materials: Only those from your shoebox that you brought in on November 18th (or before) and electricity for building the device or stopping mechanism. Hot glue gun and three (3) large glue sticks will be supplied for gluing purposes only. Xacto knife sets, cutting mat and scissors for construction purposes only and any other tools!
No tape or other adhesive attachments will be supplies nor allowed – only hot glue! You will sign for your three (3) hot glue sticks
Knowledge: Any – except Mr. Mugno
Resources: Any that you can utilize to help solve this problem.
RULES
1. Your vehicle must not crash, fall of the ramp, or touch the wall – if you do you lose 20 pts.
2. You must cross the finish line – if not your vehicle loses 10 pts. The entire transportation vehicle must cross the finish line to be counted as crossing
3. The closest vehicle that travels down the ramp and crosses the finish line without touching the wall gets an A+ (scale version outlined below).
4. The overall graduated scale is based upon the closest vehicle to the wall.
5. You may only use the supplies you have brought in and hot glue as outlined above
6. The stopping mechanism must be free standing and the shoe box cannot be used for any part of the stopping mechanism.
7. Nothing may be attached to the ramp whatsoever, except for angular construction
Grading
VEHICLE
1. Vehicles will receive a grade based upon their measurement to the wall (see the scale below), performance based grade – 40% (25% single closest measurement, 15% average of trials)
2. Vehicles will receive a grade for creativity, use of junk for creating vehicle – 15%
3. Stopping mechanism will receive a grade for creativity based upon engineering principles, use of junk for creating stopping mechanism – 10%
4. Documentation Work – 45%
- Written – 30%
- CAD Drawings – 15% (orthographic, pictorial/3D, sectional – 5% each)
5. Presentation -15%
Creativity Grades:
I am the judge and there is no discussion at all as to what constitutes junk. If any group member argues or tries to discuss this you all will be given the lowest grade on the scale – 50F – a good life experience!!!
Junk Materials = different types of junk and not within the same piece of junk. Do not ask me – have confidence in your decisions as a group and figure it out. You will know when your devices get judged.
Vehicle
A. 6 or more junk materials – 100 A+
B. 4 -5 junk materials – 89 B+
C. 3 junk materials – 79 C+
D. 2 junk materials – 66D
E. 1 junk material – 50 F
(There will be evaluation as to the creative use of the materials in the vehicle design for function – engineering principles not aesthetics)
Stopping Mechanism
A. 5 or more junk materials – 100 A+
B. 4 junk materials – 90 A-
C. 3 junk materials – 80 B-
D. 2 junk materials – 70 C-
E. 1 junk material – 60 D-
(There will be evaluation as to the creative use of the materials in the engineering design for function not aesthetics)
The stopping mechanism cannot be attached to the ramp, taped to the floor or wall it must be free standing.
Extra Points
For each extra pieces of junk incorporated on either the vehicle or stopping mechanism you will earn 1 pts for each. Up to 4 points can be attained but the vehicle must perform at least a 76 or better on the vehicle performance scale for grading to attain these points.
Testing
Each vehicle will be tested five (5) times and the average of the total distances will be the number used for grading (average 15%) as well as the closest measurement (single 25%)
EX: Trial 1 – 3-1/4” Trial 3 – 2½” Trial 5 – 5” Total = 15-1/2”
Trial 2 – 1-1/4” (96 A 25%) Trial 4 – 3-1/2” Average = 5-7/64” (79 C+ 15%)
If your vehicle traverses the entire length of the ramp you will earn a 60 D-
If your vehicle lands in the finish area completely you will earn a 70 C-
Scale for Grading
1”< = 100 A+
1-1/16” – 1-1/2” = 96
1-9/16” – 2” = 92
2-1/16” – 2-1/2” = 89
2-916” – 3”= 86
3-1/16” –4” = 82
4 -1/16” – 5-1/4” = 79
5-5/16” - 6-1/2” = 76
6-9/16” – 8” = 72
8-1/16” > = 70
** If your vehicle does either of the following: fall of the ramp, or touch the wall your distance will be as follows:
Falling off the ramp = where you fell off– the measure from this point to the wall
The vehicle crashes into the stopping mechanism and they hit the wall or the vehicle itself crashes into the wall misses, stopping mechanism does not perform properly the distance of the stopping zone – three (3) feet = 36”
Design/Construction Areas:
These areas will be designated to each group so there is no intellectual property espionage (i.e. stealing another group’s idea!)
Each Group will have their assigned ramp and mark out their finish area with tape or a sharpie.
Group 1 – Rear hallway – CAD LAB by display areas
Group 2 – Rear hallway – Stairwell
Group 3 – CAD LAB by Fire Door Exit
Group 4 – Hall outside CAD LAB/Stairwell
Group 5 – Hall Outside teachers’ café
Group 6 – Per 4 only – Back of CAD LAB doorway into the hallway
You may make as many test runs as you’d like on your assigned ramp and area – you may not use any other group’s ramp.
You are responsible for cleaning up your materials and the ramp at the end of each class meeting – you leave anything out – you lose it – that is right the ramp included!
GOOD LUCK, HAVE FUN AND WORK TOGETHER!!
Test Date: Wednesday, Dec 7th
Presentations: A Five minute presentations in Conference Center Room 100 – including videos, pictures
Documentation Work: Monday, Dec 12th at the end of class