New Owner, New Member. 22' Hunky Dory Questions
- Thread starter Greeb
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Also here's another thread on a Hunky Dory. No wonder I recalled that there was a Hunky Dory model as I took the photo of one that was for sale at EQ and posted it in that thread.
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Anonymous
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As I understand it, the moisture meter is going to indicate changes in density. They "read" into material to some depth; I think it's around 3/4" but don't remember precisely - and they'll probably vary. So, they're gonna hit more than just the surface fiberglass material and let you know what's up in the core. If there is water in the core, the meter will detect higher density than where it's dry. Keep in mind that it may have been wet and is now dry. If you find significant variations in readings, I'd take that as a strong indication that there is some moisture in the core. What I did was to "feel" around the sole with the meter and see what kind of readings I would get. I saw an area with very low readings and moved the meter until it read 10% and made a mark there. Then I moved the meter around to see where else it showed 10% readings and kept making marks. Finally I saw the pattern and connected those marks and called that the 10% moisture line. I continued the procedure at 20% and 30% and it provided me with a pretty clear picture of where the moisture was most prevalent. BTW, I'm an old photogrammetric map compiler; it reminded me of determining topographic contours on an old Kelsh stereoplotter... Good luck.
Oh, and I agree with Sunbeam and Dr. Bob about the cheap meters. For this application, if you get a reading and, more importantly variations in readings, that's what you need to know. Who cares if it's really 13% instead of 10%? If it goes from low readings to high the story is told.
T
Thanks to Roger for posting this link. It should be required reading for anyone buying a pre 1987 C Dory!
The Tramex Skipper is supposed to penetrate 30 MM (about 1 1/4"--probably best for the first half inch however. As noted the relative measures are Important.
A friend of mine and I have perfected an ultrasonic device to give us all of the answers with laminated hulls. But the cost was too much for the marine survey market. (SeriouslyThey don't make enough money) to buy them at $2,000 a unit. Plus the company we were working with wanted more profit margin. If being sold to the military they would go for the $15,000 each or so. Actually plain ultra sound, which a few surveyors use, plus FLIR (Infra Red Temperatures) analysis will give you most of the answers. Again--the cost--even though I phone FLIR is down to a few $100. Unfortunately many marine surveyors stay in the stone age. For many boats that may be OK. For a high tech hull--probably not so.
Yes, the sounding will help--but often there are false positives and false negatives.
The Tramex Skipper is supposed to penetrate 30 MM (about 1 1/4"--probably best for the first half inch however. As noted the relative measures are Important.
A friend of mine and I have perfected an ultrasonic device to give us all of the answers with laminated hulls. But the cost was too much for the marine survey market. (SeriouslyThey don't make enough money) to buy them at $2,000 a unit. Plus the company we were working with wanted more profit margin. If being sold to the military they would go for the $15,000 each or so. Actually plain ultra sound, which a few surveyors use, plus FLIR (Infra Red Temperatures) analysis will give you most of the answers. Again--the cost--even though I phone FLIR is down to a few $100. Unfortunately many marine surveyors stay in the stone age. For many boats that may be OK. For a high tech hull--probably not so.
Yes, the sounding will help--but often there are false positives and false negatives.
