Summit Tech. Ed. Dune Buggy

Mrs. Greissel

Design Challenge:

To design and construct a 4 wheeled elastic band powered Dune Buggy frame vehicle. It will be launched down a flat surface, where it will travel as far as possible. This is an interschool challenge against Maple Creek Middle.

Background KnowledgeKing Post

Pratt Truss

Albert Fink Truss

Squire Whipple

Warren Truss

K Truss

Material Strengths

Torsion: twisting

Shear: tearing

Compression: crushing

Tension: stretching

Bending: folding

Background Knowledge

Background KnowledgeJoints Construction

Procedure: 1 + 2

1.     Create your race team. (A team will consist of two members.)

2.     Each member of the team, will design a team logo. Hand the logos in for marking!

The team then chooses which logo will be shown on the side of the car.

Procedure 3

3.   Create a Dune Buggy ideation sheet, consisting of five possible frame designs.

Each member of the team will create a ideation sheet.

Keep in mind that the frame will need to support the weight of the car and take the stress of the elastic power. Choose your best design and have the instructor review your

design for practicality.

Procedure #4

4.     Draw out the maximum “Envelope” on your Final Drawing sheet.

The envelope is a rectangle that shows the largest size that your final

product may become. Each student will design a drawing or their own idea for the Dune Buggy!

Maximum: 55L x 25W x 20H grid spaces

These dimensions allow your Dune Buddy to fit in the shop storage bins.

Minimum: optional

Drafting Envelope

Procedure 5

5. Layout your final design on the graph paper provided. Show the bottom and side of the Buggy Framework.

• This drawing is to be 1:1 scale.

• Use a ruler and a pencil.

• You must have a flat (horizontal) line at the bottom of the car.

• Show the location and general size of gussets.

• Remember to leave room for the elastic band axel

Final Drawing

When the drawing is complete, hand it in for grading. Then choose which team member’s design will be used in the construction.

Procedure 6 + 7Building the Dune Buggy

Materials: Coping saw, file, sand paper, band saw, glue, tape, wax paper, assembly board, final drawing.

Building Procedure:#6 Cover your drawing with wax paper. Cut the wood pieces to

fit the bottom view of your design. Glue the pieces together. Tape the joints together to keep them in place until dry.

#7 After the bottom is assembled, start on the TWO side views.

Procedure 8-11Building Procedure:

#8 Using tape, glue the two sides onto the bottom.

#9 Cut the wood pieces that will join the two sides together at the top.These are called (Horizontal braces).

#10 Cut out the paper gussets. Glue these on when appropriate.

#11 When the sides and bottom are dry; glue the top supports in place. Use tape to hold the pieces in place.

Congratulations: your Dune Buggy frame is complete!

Procedure 12+13

Axel Assembly #12

1. Cut one length of 3/16” dowel long enough for the rear axel.

2. Cut a length of 3/16” dowel long enough for the front axel.

3. Cut appropriate lengths of straws for both axels. #13

Procedure 14

Attaching the CD’sGlue gun both sides of the CD/Black washer…

Lay the flat side of the plumbing washer on the table. Place a CD around the washer (both flat against the table).

1. Glue around the join only. Let dry

2. Flip over the CD/Washer the other side.

Do not get glue on the

wood axel or the white washer!

Procedure 15

Assemble the axel #15

Procedure 16Front Axel #16

• On the bottom of the car, draw pencil lines where the axels will be glued. (Use a PRECISION SQUARE)

• Using a hot melt glue gun, glue the straws to the bottom of the car.

Resizing the CD’s

Race Testing

Drivers will test their own vehicles for the best performance. Each team will have two runs: the best distance will be recorded.

The best 3 teams from each term will be invited to compete in the End of the Year Challenge against Maple Creek Middle.

Evaluation Overview

• Ideation - Five designs sheet /5

• Grid Final Drawing layout /50

• Logo (Individual logo) /15

• Individual construction /100

• Team work (equal effort, time, etc) /10

• Performance of car (distance) /20

»Total /200

• Effort * Appropriate use of class time

* Work is handed in on time G S N

* Level of group work

Dune Buggy CompetitionCriteria/Evaluation

 

Ideation - four designs  This is an individual activity… each student makes their own ideation!

        Four different side views /3        Neatness: ruler and pencil used /2

/5  

 

Team Logo This is an individual activity… each student makes their own Logo!

•  Carefully coloured + outlined details /8•  Effort (Time + Neat + Tidy) /2•  8-1/2 x 11 clean, flat, well kept paper /2• Appropriate content (words/picture) /2• Name and block /1 /15  

Dune Buggy CompetitionCriteria/Evaluation

Final Drawing - layout  This is an individual activity… each student makes their own drawing!•Top and bottom Envelope (shown maximums) /5•In pencil (lightly) + ruler used /5•Line Neatness (clean, single, smooth lines, etc) /15•Corners sharp (shows joint type when appropriate) /15•Gussets shown (neatly drawn) /5• Name + block /5

/50Racing Distance

This mark is based on a performance scale. The cars that receive the greatest distance will receive 100%. The next cars that roll the greatest distance will receive 90%, and so on. The shortest distance possible will be a default distance of 8-10 feet. The highest total mark for distance is 20 marks.

Dune Buggy CompetitionCriteria/Evaluation

Dune Buggy Team Construction

Construction/Joints

Quality 5 4 3 2 1

       Difficulty 5 4 3 2 1

Strength 5 4 3 2 1

Joints touch 5 4 3 2 1

Tidy glue MINIMUM 5 4 3 2 1

CD/washer gluing correct 5 4 3 2 1

     Axles parallel 5 4 3 2 1

     Spirit, logo on car 5 4 3 2 1

    Gusset (neat,tidy) 5 4 3 2 1

    Team Group work 5 4 3 2 1

_____/50 x 2 = _____%