| From Article Surveying
Boats
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This sailboat uses a premolded
grid that completely disbonded from the hull. |
The problem here was inadequate
tabbing which can be seen broken loose at left,
center and right of photo. Only the webs are glassed
while the longitudinal section (seen at top) is
not bonded to the hull at all. |
|
 |
The framing system in this
boat was reduced from a 4 stringer system to 2 stringers
because it was thought that the liner would provide
the needed extra strength. |
The liner broke loose and the
stringers started to fracture as shown in this photo.
The area of the break was completely obscurred by
the liner and was not discovered before the bottom
cracked open. |
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Bonding failures can sometimes
be difficult to detect. |
This broken liner bond was
only discovered by sounding because the break was
obscured by a dirty bilge. In this photo, it is
cleaned for purposes of clarity. |
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When full inner liners
are used, internal plywood partitions are usually
secured to the liner with screws. If the liner is
loose and working, it is very likely to result in
misalignment of internal components. In this case,
the large gap and shifting of a partition was a
dead giveaway of a structural problem. Further evidence
was in the form of screws backing out of parts fastened
together. |
Go to Article
First posted 6/08/97 at David Pascoe's site www.yachtsurvey.com.
- Keeping the Pleasure in Pleasure Boating
- How to Decide if Buying an Older Boat is Right for you.
- To Buy or Not to Buy . . . .A Blistered Boat, That Is.
- Bubble Boats : The Space Shuttle Goes to Sea
- Top Twenty-Five Design Errors
- How to Avoid Purchasing a Stolen Boat
- Windows, Windows, Those, Leaky, Leaking Windows
- Reasons Why Screws Shouldn't be Used to Fasten Boat Parts
Buying A Boat or Yacht
- All about Bilge Pumps
- Corrosion with 9 photos
- Corrosion in Marinas
- Deck Leaks
- Diesel Maintenance Or Lack of it
- Exhaust Risers
- Electrical System Use and Maintenance
- Illustration of Water Absorption From a Hull Interior
- How to Install an Aluminum Fuel Tank
- Maintaining Stern Drives
- How to Repair Window Leaks
- Tips for Painting Fiberglass Boats
- How to Keep Your Boat from Sinking
Maintenance, Repairs and Troubleshooting
- The Wonderful World of Hull Blistering
- Failed Blister Repairs: A Case History and Solution
Hull Blisters
- Troubleshooting Problems Involving Engine/Shaft Alignment
- More articles at Marine Engines at yachtsurvey.com
Marine Engines
- Docking in Style
Boat Handling
- Safe Harbor :Hurricane Preparation
Hurricane Preparations
- High Tech Materials in Boat Building
- More Articles at Cores & Structural Issues
at yachtsurvey.com
Cored Hull
Over 160
Online Articles by David Pascoe
David Pascoe's
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Mid Size Power Boats
A Guide for Discriminating Buyers
Focuses exclusively cruiser class generally 30-55 feet
With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers.
Buyers' Guide to Outboard Boats
Selecting and Evaluating New and Used Boats
Dedicated for offshore outboard boats
A hard and realistic look at the marine market place and delves into issues of boat quality and durability that most other marine writers are unwilling to touch.
Surveying Fiberglass Power Boats 2nd Edition
The Art of Pre-Purchase Survey The very first of its kind, this book provides the essentials that every novice needs to know, as well as a wealth of esoteric details.
Marine Investigations
Pleasure crafts investigations to court testimony The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues.
Links to pages of each chapter contents at davidpascoe.com
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1 480 pages
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