K'Nex Education 79318 Manual Download

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Education

Objectives:

Understand and describe the transfer of

motion through a spur gear system and investigate the

relationship between gear size, speed of rotation and force.

Materials You Will Need:

PROCESS:

1. Build the CRANK FAN model by following the step-by-step building instructions.

2. Explore your model. Locate and identify the gears. Watch the gear mechanism in

operation as you turn the crank.

3. Using your notebook, explain how the gear system turns the fan blades. How do

the fan’s gears fit together? Are they in line with each other?

Experiment #1

Using a Spur Gear

System in a Crank Fan

79318

built CRANK FAN model
masking tape
paper or notebook

Summary of Contents for Education 79318

Page 1: ...FAN model by following the step by step building instructions 2 Explore your model Locate and identify the gears Watch the gear mechanism in operation as you turn the crank 3 Using your notebook expl...

Page 2: ...this model are Crank driver gear driven gear and fan blades Using masking tape label the different parts of your model 6 Using your notebook respond to the following a Describe how the moving parts th...

Page 3: ...d driven used in the model d Could there be a relationship between the size of the gears and your findings to b e Turn the crank one additional turn but this time notice how far the fan blades travel...

Page 4: ...ze Make a note of your responses in your notebook e Compare the speed at which the fan turns with the speed of the crank when the small gear is attached to the crank axle and the big gear is attached...

Page 5: ...ar and the small gear is the driven gear c Second use the small gear as the driver gear and the large gear is the driven gear NOTE Do not to disassemble your fan Simply attach the crank to the appropr...

Page 6: ...ps 4c 4e with the small gear as the driver gear and the large gear is the driven gear Gears are same size Large driver gear moving small driven gear Small driver gear moving large driven gear GEAR TRA...