Sept 13th- Exploratory-Paper Tables

Challenge:

Paper Table( 20 minutes)

Working individually, design and build a table out of newspaper tubes. Make it at least eight inches tall and strong enough to hold a heavy textbook.

Do a sketch first ( 5 minutes)-- then summarize your plan in three words, then build for 20 minutes.

MATERIALS(per person)

• 1 piece of cardboard approximately 8 1/2" x 11"
• Heavy Textbook
• Masking Tape( no fixed amount, but don't over-do it)
• 8 sheets of newspaper ( 1 double sheet of Boston Globe = 2 sheets)

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Say 3 words that describe your design--then 1 minute to revises--

Supports--4-legs

strong --support--simple

stout--support--triangle

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 Top right--I liked the use of diagonal struts to stiffen the square..

This one above reminded me of a Kenneth Snelson tensegrity sculpture:

Are there designs you would change? What would you change?

Truss arrangement is most stable-

Compare to Wright Flyer( 1903)-- only compressive structures are vertical posts, all diagonals are cables in tension.

Truss Animation: http://www.pbslearningmedia.org/resource/phy03.sci.phys.mfw.bbtrussanim/train-truss-animation/

Rods vs Tubes( Lorna Gibson, MIT)
Local Buckling

Columns in Nature (Lorna Gibson, MIT)

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Where we are going:

• Electricity( penny batteries, etc.)
• Larger projects:
• Passive Solar
• Active Solar
• Wind Power/turbines

If you are the kind of person who cares about how things look---go for it!

If you are the kind of person  who just wants things to work---go for it!

We need both types!

Culture of NNHS Greenengineering:

• About trying things out
• About figuring how things look
• You'll remember things better if you're the person who figured things out( rather than just asking the teacher)
• Think about potential solutions and ways to get around issues you encounter.
• Later we will often have music on,
• We will be having a short safety review and quiz next week
• Cleanliness-always an issue- we share the space with three other classes, so important to clean up.
• Shop organization is an issue being worked on.
• Prototyping bins- you can use anything.
• Grading- we have a rubric. Main issue is that you are working instead of vegging, texting, etc..... if you don't know what to do---ask!

Spring Semester

• Plants

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301 Students-- worked on web design, chose new Weebly theme