Lesson: 20L ESR Slo-Mo Riley Challenge

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Objectives: 

In this challenge students will design Rockin' Riley to move in slow motion by gearing down.

1) Watch this video to learn how to gear down Riley by removing the wheels and axles, then adding these part to Riley's motors:

2) Start the video again, this time pausing so you can follow along and assemble the gearing down attachment to Riley.
When you are done, the gearing attachment should look like these two images (note: most of Riley is invisible in these images, we just see Riley's two motors to give a clear view of the attachment you will build):

Riley Gearing Down Image 1

Riley Gearing Down Image 2

3) Write a program to have Riley drive straight for 3 seconds.  What do you notice?

4) Run your Rockin' Riley program again - what has changed?  Why?

5) The video and images show the 8 and 40 tooth gears attached.  Now swap in the 24 tooth gear for the 40 and see what changes (these are the same gears used in the previous lesson with the hand-crank/wheel).

6) Answer this question:

Why does Riley go slower when geared down?

 

 

 

 

 

NEW GEARING DOWN LDD DESIGN (TEST) - LXF File for PC or Mac

 

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