FVSPS Sail Course, Class 5

1
FVSPS Sail Course, Class 5
2
What Are We Doing Today?

• In Class Today
• - 1000 OTW Today Briefing (Brian)
• - 1010 Last Weeks OTW, Discuss (Brian)
• - 1020 Questions/Clarification, Sec. 7, 8, 12
  (Leslie)
• - 1050 Section 9, Wind (Brian)
• - 1110 Section 10, Sail Shape (Brian)
• - 1140 Section 11, Preparing to Sail (Leslie)
• - 1155 OTW Assignment (Brian)
• - 1200 Lunch, then OTW

3
OTW TodayBriefing
4
Available On-BoatAdditional Training

• 1. Going aloft
• 2. Folding Sails on Side Deck
• 3. Hanking on Headsail
• 4. Changing Headsail on a Roller Furler

5
Prior OTW, Discuss

• 1. What did you learn?
• 2. What went right?
• 3. What went wrong?

6
Questions/ClarificationsSections 7, 8, 12
7
FVSPS Sail Course
Wind Sail Book, Section 9
8
Section 9, Wind, Overview

• Two Separate Topics
• - Weather (pp. 69-72)
• - Analysis of Wind and Boat Movement (pp. 72-79)

9
Weather

• - Recommendation Take USPS Weather Course
• - Sea Breeze, Land Breeze (pp. 69-72)
• - Beaufort Wind Scale (p. 71)

10
Analysis of Wind andBoat Movement

• - True Wind
• - Boat Wind
• - Apparent Wind

11
True vs. Apparent Wind

• - Simple Situations Directions of True Wind and
  Apparent Wind Parallel
• - Not Parallel Situations Analyze with
  Trigonometry, Diagrams
• - Sail Book, pp. 74-75

12
True vs. Apparent WindSome Implications

• - Why a Beam Reach takes us Downwind (Fig.
  9-9/10, p. 75)
• - Why When We Tack we Tack Further than we Expect
  (Fig. 9-8, p. 74)

13
(No Transcript)
14
Apparent Wind Decompose intoForward and
Sideways Components

• - Use Triangle Diagrams (Fig. 9-12, p. 76)
• - Why Boats heel most on a Close Haul (p. 77)
• - Implications for Sail Trim (Fig. 9-15, p. 78)

15
Sail TrimGoal, Rules of Thumb

• - Want to Keep Sail at Same Angle of Attack when
  in Pull Mode (Fig. 9-15, p. 78 Fig. 10-3, p. 84)
• - When in doubt, let it out (Summary, p. 79,
  end)

16
FVSPS Sail Course
Sail Shape Sail Book, Section 10
17
Sail Shape, Basic Concepts

• Angle of Attack
• Laminar Flow over Sail
• Using Telltales to Assess Angle of Attack,
  Whether Air Flow is Laminar

18
Sail Shape, Major Adjustments

• Angle of Attack Sheets/Helm Adjustment
• Draft mainsail outhaul, sheets, halyards,
  cunningham
• Basic Rule Flatten Sail to De-Power (in Pull
  Mode)

19
Sail Shape, Twist Adjustments

• Headsail Placement of Genoa Car
• Mainsail Boomvang, Traveller, Sheet

20
Sail ShapeUnderstanding Twist

• Wind Gradient
• Effect of Stronger True Wind on Apparent Wind
• Need for Sail Twist to Keep Same Angle of Attack

21
Understanding TwistSail Book Errors

• P. 86, par. 16
• P. 86, par. 17

22
FVSPS Sail Course
Preparing to Sail Sail Book, Section 11
23
Stepping the Mast
24
Preparing to Sail

• Check the weather.
• Reefing?
• Headsail choice?
• Have the proper clothing, footwear.
• Bring any needed food and water.

25
Crew Activities, Departing

• Remove canvas, instrument covers.
• Hank-on headsail.
• Tie/run jib sheets.
• Run main sheet.
• Attach halyards.
• Untie dock lines.
• Stow fenders.
• Close life-line gate.

26
Sailing Activities

• Hoist mainsail.
• Hoist/unfurl headsail.
• SAIL!
• Deploy lazy jacks.
• Drop/furl headsail.
• Drop/flake mainsail.

27
Crew Activities, Returning

• Open life-line gate.
• Deploy fenders.
• Positioned to step quickly off onto dock.
• Tie Boat to the dock (Basic Keelboat, p. 49).
• Fold/bag headsail.
• Remove/coil jib sheets.
• Flake mainsail, stow lazy jacks.
• Stow main sheet.
• Position canvas, instrument covers.

28
OTW Assignmentfor Today
29
Available On-BoatAdditional Training

• 1. Going aloft
• 2. Folding Sails on Side Deck
• 3. Hanking on Headsail
• 4. Changing Headsail on a Roller Furler