TOTAL TIME: 1 Hour
OBJECTIVES: To look at and discuss wind systems used throughout history; with an eye toward selecting types and styles which might be useful locally.
MATERIALS: Blackboard or equivalent, 35 MM Slide Projector Screen, or Photographs and Drawings
PROCEDURES:
Step 1: 15 minutes
Discuss the history of the development of wind systems, emphasizing water-pumping applications.
Step 2: 15 minutes
Examine the wind systems pictured in the handouts, noting the different construction methods used.
Step 3: 15 minutes
Discuss the various types of wind systems by categorizing them when possible.
Step 4: 15 minutes
Examine the windmills pictured in the text and discuss the possible uses and ease of construction of the various types.
Trainer Note
Many of the construction styles and other details of methods in this text are very appropriate to low resource areas.
RESOURCES: Text - Homemade Windmills of
Nebraska
Copies of Attachment 2-A, 2-B, and 2-C
Attachment 2-A
Figure 1: A Horizontal Windmill
Mounted in a Tower, c.1495
Figure 2: A Horizontal Windmill,
c.1718
Figure 3: Wind Pumps with "jib" Sails
Figure 4: Cretan Sail Wind Water Pump
in Operation
Figure 5: Two Views of a Persian
Vertical-Axis Windmill that has Traditionally Been Used to Grind Grain (see
grindstones at bottom
left)