STRUCTURES & MECHANISMS: Pulleys

Here's an in-depth explanation of pulleys (activate subtitles if necessary):

STRUCTURES & MECHANISMS: Let's play!

In this lesson we're going to have fun playing 2 interesting games:

• STRUCTURES: West Point Bridge Designer
• Download EXE setup file from here
• Sample Youtube tutorial below

• MECHANISMS: Gears & Chains
• Visit this web link if you see a "Get Adobe Flash" icon

EXAM: Wood & its derivatives

This is a guide to study this lesson.

• ALL key concepts
• ALL proposed exercises  
• Getting wood process
• Classifying wood: harwoods (decidious trees): beech, oak, mahogan / softwoods (conifer): pine, silver fir, white poplar.
• Derivatives of wood
• Engineered wood: plywood, chipboard, fibreboard
• Cellulose materials (the process of making paper)
• Properties of wood
• Key concepts
• Cut against the grain or with the grain
• Equipment, tools and machines (identify pictures, name them, classify them...)
• Measuring
• Drawing marks & lines
• Cut & saw
• Drill
• Curve & plane
• Sand
• Join
• Painting
• How to use: handsaw, fret saw, gimlet, rasp, sandpaper

[PRJ] R/C vehicle

This will be our project: a Remote Controlled vehicle (car, van, tractor, truck, quad, dumper....)

Its construction will involve applying several technical skills (mechanics, electricity, wooden handicrafts...)

Useful web pages:

• LOGKIT 1845 (to help you with your freehand sketch, page 5)
• Paco Ruiz's Blog (images, videos & construction)

Please note, here are some important details (to simplify, they can only turn in one direction when moving backwards):

Our DC motor with reduction gearbox and our available tyre sizes force us to install it into the vehicle chassis in this position (unless you want to use bigger tyres):

Approx. dimensions of this mechanical part are:

[width x height x depth] (as seen in above photos)

34 x 55 x 33 mm (without external gears)

55 x 55 x 44 mm (with external gears & mounting tabs)
150 mm axle track (as shown in picture below)

Watch these videos to see some vehicles in action:

Source: Paco Ruiz

Technical Drawing: 3D objects (2)

In this link you will find some more difficult & useful 3D objects:

• 3D objects (2)

Hidden lines are important!

EXAM: Graphic expression in technology

Here are some possible exercises:

- All key concepts (in the margins)

- Definitions
- Types of pencils
- Paper size, weight, finish
- Differences between sketches, diagrams, technical drawings (draw / identify them)
- Use of ruler, protractor, triangle and set square (angles, parallel, perpendicular lines...)
- Scales: (angles are the same, but lines are different) / identify enlargement & reduction / draw an object at a different scale / graphic scales / choose the best scale to represent an object
- Annotation: line standardization, symbols, MILLIMETERS, annotation rules in 2D & 3D
- Viewpoints: front, side, plan view (placed correctly), don't forget correspondence between viewpoint lines!
- Draw an isometric view from orthographic views

Good luck!

SKETCHUP: Download & Install

Please find below some useful links to download & install Google Sketchup:

All products:
https://www.sketchup.com/es/download/all#es

SketchUp Make 2017 (Windows 64 Bit) (English)
http://dl.trimble.com/sketchup/2017/en/sketchupmake-2017-2-2555-90782-en-x64.exe


If you don't want to install it on your computer, you can use SketchUp Free in your Web Browser:
https://app.sketchup.com/app?hl=es

Any questions? please drop me an email.