Sir Wilfrid Laurier SS

Technological Design


Course Topics: TDJ1O | TDJ2O | TDJ3O | TDJ3M | TDJ4O | TDJ4M

MOUSE TRAP BOAT 2010


Problem Statement:boat1.JPG

To research, design, construct, test, modify and report on a moving water vehicle powered only by the energy stored in a spring from a mouse trap which will travel 12 feet the fastest.

Design Criteria:

The vehicle may contain the following:
• The boat must use a standard mousetrap(1 3/4” * 3 7/8”) provided by instructor
• Rat trap or any other size besides standard are not allowed
• The spring on the mousetrap is the sole power source.
• No rubber bands or extra power boosters of any kind will be allowed
• The spring on the mousetrap can be cut and bent, but not heat-treated or chemically altered in any way.
• The maximum length of the boat is 18”, doesn't include lever arm.
• All material used to construct the vehicle must be non-hazardous (ie. No latex …)
• NEW (UPDATE) -- NO kits!!! -- the design must be an original constructed item, not just an assembly of prefricated items...
• Vehicles must be self-starting. Vehicles may not receive a push in the forward direction or side direction.
• The vehicle must steer itself.
• Vehicles can not receive a running start and must start as close as possible to the start line. Time of run will begin when any part of the vehicle passes over the start line and ends when the same point passes over the finish mark.


Supplies Provided by Instructor

• One standard mousetrap (1 3/4” * 3 7/8”)
• One piece of pink block styrofoam

IMPORTANT NOTICE: Treat this challenge like a Junkyard Wars competition, find and use material that is available to you from home, there should be no real cost to you, however, if you find you need to buy something don't spend more than $5.00 in total.


Hand In:

  1. Operational Mouse Trap Boat
  2. Written Technical Report
  3. Wikispaces presentation
  4. 3D Sketchup scale model

Task Steps:
Day
Date
Classroom
Homework
1
Tuesday,
May 11
MTB Research -
Wikispaces
2
Wednesday,
May 12
(5) Thumbnail Sketches
Wikispaces
3
Thursday,
May 13
Thumbnail Sketches and Solution Chart/ Rational
Wikispaces
4
Friday,
May 14
(1) Technical Drawing
(1) Sketchup Drawing
Wikispaces
5
Monday,
May 17
(1) Technical Drawing and List of Material
(1) Sketchup Drawing
Wikispaces
6
Tuesday,
May 18
Construction
(1) Sketchup Drawing
Wikispaces
7
Wednesday,
May 19
Construction
Wikispaces
8
Thursday,
May 20
Construction
Wikispaces
9
Friday,
May 21
Testing Evaluation
Wikispaces
10
Tuesday,
May 25
Testing Evaluation
Wikispaces
11
Wednesday,
May 26
Race Day
submit MTB
Wikispaces
12
Thursday,
May 27
Submit Report, wiki and sketchup - May 27, 2010

Sketchup Drawing
Wikispaces

Evaluation:

  • Evaluation Chart



Images

841880.jpgmousetrap_boat.jpg


CONSTRUCTION Information and Tips for Mouse Trap BOAT:

How does it work?

The concept of how this boat works is really simple. In fact, it’s very similar to how mousetrap cars work. The only difference is that with the cars, you need to use wheels to make the car move, while with the boats, the axles are connected to paddle wheels.

The boat should have a platform where the mouse trap is placed. Balance of the boat is important here so it would be a good idea to have the mousetrap set at the front of the platform since the paddle is at the back. If both the mousetrap and the paddle are at the back of the platform, chances are, your boat will sink.

Now, the snap of the mousetrap should have an extension since you want to conserve the potential energy stored. A string connects the extension and the axle of the paddle wheel. When the snap is released, the string will turn the paddles and thus, will push the boat forward. Now, as i mentioned, you want to extend the time of releasing the energy from the mousetrap’s snap. The reason for this is that there is more friction involved with the boat as compared with the car and you don’t want to waste all the energy on starting the movement of the boat alone.


CONSTRUCTION Information and Tips for Mouse Trap CAR:
Tip #1: Traction
Tip #2: Torque
Tip #3: Lever
Tip #4: Hook & Lasso
Tip #5: Adjustable Steering
Tip #6: Decrease Rolling Friction
Tip #7: Changing the Force
Tip #8: CD Spacers
Tip #9: