DO NOW

• List the key steps in an engineering design process.

• Write this down in your notebooks.

Engineering Design Process

ENGINEERINGDESIGN

PROCESS

1. Identify the Problem

• This will often be done for you.

• Use observations, data, and testimony of others.

2. Identify Criteria and Constraints

• Limits on materials, space, and time.

• What materials are best for the project?

• How much space is available for a solution?

• How quickly is a solution needed?

3. Brainstorm Possible Solutions

• Research, research, research.

• Share ideas.• Take notes.• Draw sketches.• MORE Research!!!

4. Generate Ideas

• Select a few ideas to develop more.

• Do scale drawings.

• Consider materials and construction.

5. Explore Possibilities

• Discuss all developed ideas.

• List pros and cons for each idea.

6. Select an Approach

• As a group, select the idea that will work best.

• Integrate parts of multiple ideas.

• Refer back to Step 2… Consider your restrictions for the project.

7. Build a Model Prototype• Refer to sketches, idea design, and notes.

• Design may need to be refined as you build (possibly more than once).

• Enables you identify faults, strengths, and weaknesses of your design.

8. Refine your Design• Show your solution to

your peers, judges, and/or the public.

• Test to make sure it’s within limits.

• Make it better.– Based on

performance– Based on

observations of other solutions

AGENDA SEPT 12

• BIG QUESTION: HOW DOES THE EDP ALLOW YOU TO BUILD A BETTER TABLE?

• 1. Hand in your EDP Review Problems

• 2. EDP QUIZ

• 3. Place Quizzes in HW Box when done.

• 4. Finish Newspaper Tables 2

Engineering Design Quiz

• Engineering Design Quiz will be given on Thursday Sept 12

DO NOW Sept 11

• You are asked to design a new touring bicycle for the US Postal Service team.

• Describe how you would go about this process. Use EDP as a framework

DO NOW ANSWERED

• Find out if the riders have any specific requests (Step 1)

• Determine a budget, building materials, and how quickly they need it (2).

• Research existing models and share new ideas. Collect data on what works (3).

• Choose a few ideas to develop. Different frame materials (aluminum, titanium, carbon fiber). Notes and drawings (4)

• List pros and cons of each bicycle design (5).• Pick the best idea with your team. Use multiple

parts from different ideas (Frame material from one idea and frame geometry from another idea 6).

• Build a bike. Does it all fit together? (7)• Get out and RIDE! Make improvements based

upon rider feedback, input, suggestions (8)

AGENDA Oct 14

• BIG Question: How do applied forces affect the strength of a structure?

• 1. What’s Next Project

• 2. Review EDP

• 3. Bridge Building Teams

• 4. Scope of the Project

WHAT’S NEXT PROJECT

• Great suggestions from everyone in the class.

• Project was selected based upon the following criteria….– Time frame of project– Availability of materials– EDP

EARLY BRIDGE DESIGN

• The first bridges were made by nature.– Early man did not possess the

intelligence or the means to construct bridges.

– The first Arch bridges were formed by the constant erosion

of running water.

The Evolution of the Modern Bridge

• The Romans began building bridges as a necessary means of access to connect the lands of its vast empire.

• Generally made of rock.

Modern Bridges• Construction of the original London Bridge began in 1176

and was completed in 1209.

• Approx. 900 feet long and 26 feet wide.

• Built on 19 irregularly spaced arches.

• It quickly began an economic center.

• By 1358, 138 shops, defensive towers, and a drawbridge were in place.

The Modern London Bridge

• After 600 years, the “Old” London Bridge needed replacement.– Disrepair– Blocked river traffic– John Rennie – 5 stone arches– Thomas Telford’s design of a 600 ft iron bridge

was rejected.

The Keystone

DO NOW Oct 15• You and a friend work for the

World Wildlife Foundation (WWF). Your latest assignment has taken you to the grasslands of Kenya in East Africa. The White Rhino is near extinction. A few animals live in a sanctuary in Kenya. You will be investigating sightings of a these animals in the wild.

DO NOW Oct 15

• You decide to treat this assignment like a mini-vacation and leave your guide back at the village.

• You are driving through dangerous terrain and blow out a tire. Your vehicle veers off the road and down a sheer embankment dropping you into a large valley. Your friend suffers a broken leg and cannot walk.

DO NOW Oct 15

• You are 10 miles from the nearest village but have no way of getting back to any of the travelled roads.

• You immediately spot a pack of hyenas on the hunt.

• How would you and your friend be able to survive the conditions until help arrives (if anyone will be looking for you at all)?

Bridge Design

• http://science.howstuffworks.com/29829-understanding-bridge-designs-video.htm

DO NOW OCT 18

• Hand in your Engineering Disaster Critiques.

• Break down into your BRIDGE Design Teams

SURVIVOR CANADA

• AND the winning team is

• KATIE, DOROTHY, and LIZZY

• CONGRATULATIONS!!!

• YOU have won 1 Million Dollars!!!

AGENDA OCT 18

• BIG QUESTION: Which bridge design is capable of supporting the most weight?

• 1. Bridge Design PHASE 2

• 2. See the Handout

• 3. Disaster Critiques DUE TODAY– NO EXCEPTIONS– PLACE them in the Homework Box before

you leave.

QUESTION of the DAY OCT 21

• A common structural flaw in bridge design

DO NOW OCT 21

• Calculate the efficiency of a bridge having a mass of 50 g capable of supporting a maximum load of 10 kg.

ANSWER

Max Load in kg x 1000 g

E = ---------------------------------

Mass of Bridge in g

(10 kg) x 1000 10000 g

E = --------------------- = -------------- = 200

50 g 50 g

AGENDA OCT 25• BIG Question: Which bridge design is capable of

supporting the most weight?• BRIDGE TESTING TODAY (EDP Step 8)

• 1. Teams finalize your Bridges for testing.• 2. Weigh your bridge• 3. BE READY FOR TESTING• 4. Review and Closing Thoughts

BRIDGE DESIGN CHALLENGE

• IF you need time to finish your bridges, you may do so quietly in the back of the classroom.

• Remember, you must record all data from the bridge tests.

• VOLUNTEERS PLEASE!!! • Or I will VOLUNTEER YOU.

BRIDGE TESTING GUIDELINES

• 3 types of bridges will be tested.

• Each team will present their bridge to the class.

• Teams will briefly discuss why they chose their bridge design.

• Bridge will be tested.

• Record all data in the table provided to you.

QUESTION OF THE DAY OCT 28

• From a consumer’s perspective, new technologies introduced into a specific field of interest should be

• A. More expensive than previous technologies• B. not require any lab testing before they are

available to the public• C. be more profitable for the corporate world than

previous technology• D. meet the needs of the general population the

technology is targeted for

Question of the DAY OCT 29

• Which force acts in a positive perpendicular direction to the flow of an aircraft?

• A. Thrust

• B. Drag

• C. Lift

• D. Weight

Forces Acting on an Aircraft

• LIFT

• WEIGHT

• DRAG

• THRUST

LIFT

• Lift is the force that directly opposes the weight of an airplane and holds the airplane in the air.

• Can be generated by propellers or turbines.

• Accomplished through the use of a wing

Thrust

• Thrust is the force which moves an aircraft through the air. Thrust is used to overcome the drag of an airplane.

• Can be generated by propellers or turbines.

Weight

• In science and engineering, the weight of an object is usually taken to be the force on the object due to gravity.

• Weight = mass of object x gravity

• Force of gravity = 9.8 m/sec squared

Drag• Drag (air resistance or fluid resistance) refers to forces

which act on a solid object in the direction of the relative velocity.

• Drag forces are dependent upon the velocity of an object.

• Drag forces always decrease velocity relative to the object’s path.

Forces Acting on an Aircraft

• http://www.youtube.com/watch?v=5ltjFEei3AI

Your Objective for Today

• Build Paper Airplanes.• Create different designs.• Use the front of the classroom to test your designs.• Keep your best designs.• Record the results of each of your planes along

with a simple sketch.• You may work with a partner however each of

you must design and create your own airplanes.

DO NOW

• Hand your Bridge Design Challenges

• One team bridge still needs to be retested.

• I am working on a method to test it.

How to Build a Paper Airplane

• http://www.paperairplanes.co.uk/nickplan.php

• http://www.paperairplanes.co.uk/dragon.php

AGENDA OCT 31

• BIG Question: How do forces that act on an airplane affect aircraft design?

• 1. DO NOW

• 2. MODEL AIRPLANES CHALLENGE

• 3. Finish Graphene Webquest

• 4. HOMEWORK: Webquest DUE FRIDAY NOV 1 - NO EXCEPTIONS

• Test Paper Airplanes

YOUR OBJECTIVES

• 1. Complete the Webquest – DUE TOMORROW

• 2. Research your Model Airplanes

• 3. Be Ready to test them tomorrow!!!

• Also record all of the information from the handout.

Library Guidelines

• Working in pairs on Study Island

• NO Cell Phones or Music or Videos

• Stay ON TASK

• Keep the noise level down to a minimum

Question of the Day

• Supports that span the base of the framework are most likely needed to

• A. prevent the catapult from flipping over

• B. weave the rope around the throwing arm

• C. provide additional frame rigidity

• D. install the safety mechanism

DO NOW

• Take out the EDP Review homework.

• Leave it on your desk.

• I will check it during the course of the class.

AGENDA NOV 12• BIG Question: How does the EDP affect the

design and construction of your catapult?• 1. QotD and DO NOW• 2. CATAPULTS, CATAPULTS, CATAPULTS

– Continue construction

– Measure and mark wood for holes

– Safety mechanisms

• 3. Closing Thoughts and HOMEWORK• TESTING by the END of THIS WEEK…

TRIMESTER EXAM FORMAT

• TRIMESTER EXAM will be a WRITTEN EXAM.

• Questions including M/C, SHORT ANSWER, and ESSAY.

• The projects we have done (mostly the Catapults) will be incorporated into the exam.

TODAY’S OBJECTIVESCONSTRUCTION PHASE

• Continue the construction of your catapults.– Safety Mechanisms– Mark wood for holes– List any additional parts you need– Launching baskets (Bring from home if you

need to)

TESTING PHASE before the end of the week