Cruising Sails / Appropriate Technology

1
Cruising Sails / Appropriate Technology

• Quantum Sail Design

2
Balancing The Equation

• Performance
• Durability
• Dollars

3
Three Types of Construction

• Cross Cut (Woven Dacron)
• Tri Radial or Oriented (Polyester or Pentex
  Composites)
• Tri Radial With High Modulus Fibers (Vectran,
  Spectra, etc.)

4
What Do You Gain?

• SHAPE
• Shape Life
• Durability?

5
Cross Cut Sails

• Woven Polyester (Dacron)
• The Quality Issue in Woven Materials
• Type of Yarns
• Number of Yarns per inch
• Finish
• Downsides to Dacron

6
Tri Radial (Fiber Oriented) Sails

• Threadline / Loadline Alignment
• Composites versus Wovens
• Downside Risks / Mold and Mildew

7
How Do They Know?
8
Sail Loadings
9
Stress Flow
10
Oriented Composite Materials

• Exterior skins of woven polyester
• Pre Tensioned Scrim
• Mylar Film

11
How Much Stronger?How Much Better Shape?

• Dacron
• Polyester Composites
• Pentex Composites
• High Modulus (Spectra or Vectran)

12
Shape Change Dacron Versus Design
13
Shape Change Polyester Composites Versus Design
14
Shape Change Vectran Composites Versus Design