bartley

I am not 100% sure but I think these files are actually "double precision".  ie more digits for each pixel (and so more bits and a larger file)
 
John

Jim,
 
Here in Oz  I by ZAP CA.  There are four grades which vary in viscosity:
 
Pink is Super thin and dries in 1-5 sec
Green is Medium and dries in 7- 10 sec
Yellow or SLO-ZAP dries in 30 sec
There is also a purple bottle called Safe ZAP which is supposed to be "fumeless" and is medium viscosity.  I have not tried this one.
 
The viscosity obviously affects the drying time but it also influences the gap filling ability.
 
John
 

Jim,
 
Here in Oz  I by ZAP CA.  There are four grades which vary in viscosity:
 
Pink is Super thin and dries in 1-5 sec
Green is Medium and dries in 7- 10 sec
Yellow or SLO-ZAP dries in 30 sec
There is also a purple bottle called Safe ZAP which is supposed to be "fumeless" and is medium viscosity.  I have not tried this one.
 
The viscosity obviously affects the drying time but it also influences the gap filling ability.
 
John
 

Druxey
 
The term “coating” may need to be treated with some licence, especially in the language of 200 years ago.  In the book on Marine Antifouling from Woods Hole the statement is made “In the 18th century, wooden sheathing was filled with copper nails whose heads touched each other.” The article does not, however, say that this was called “Pease”. 
 
 
You are correct, Druxey, when you say that the typical green colour, which we see on copper rooves only forms in air.  It is probably mainly copper carbonate but the chemistry of the oxidation of copper is complex. Copper oxide is certainly brown but copper chloride which forms in sea-water is bluish geren when in its hydrated form.
 
Anyway, perhaps the more interesting fact is that although this treatment would possibly have prevented the attachment of barnacles and the build up of algal slime, it would not have prevented the ingress of Toredo worms which would attack the wood between the nails.  In fact, first copper plating suffered from a similar deficiency since the worms were able to penetrate the gaps between the plates.  Later a layer of canvas or felt was attached to the hull before the plates were attached so that there was no bare wood for the worms to attack.
 
In fact, I have seen these worms “in the flesh” as it were.  In a previous life I belonged to the Brisbane 18 Footers Sailing Club located on the Brisbane River.  In the early 1980’s we refurbished our wharf involving, among other things, removing the 80 year-old wooden piles and replacing them with concrete ones.  In spite of the original piles being made of Australian hard-wood, the section below the low tide mark was riddled with holes made by Toredo worms.  We could not at first see the worms themselves but when the piles were cut in half the worms were visible and could be prised from their tunnels.  The largest were about half an inch in diameter.  They had a domed carapaceous head and jaws but the intestines and other body parts had no covering of any kind.  I can only describe this part of the animal as resembling a piece of snot.  The largest were about a foot long.  The tunnels were parallel to the grain and seem to be lined with some kind of calcified material, perhaps to prevent them from collapsing. These worms apparently never emerge once they have invaded the timber and spend their whole lives in the sane piece of wood.  How boy Toredo worm meets girl Toredo worm I am not sure but adversity has never been a deterrent for this kind of activity.
 
Incidentally, for those who have never seen an 18 foot sailing boat, it is worth having a look on the web.  They are an unrestricted class of sailing boat and there are only two rules – The boat must be 18 feet long and the race starts at two o’clock.  There have been many developments over the years but they are always grossly over-canvased and capsize at the slightest provocation.
 

 
John

Druxey,
This  topic is old now but I read somewhere (not sure where now) that "pease" was a fore-runner to copper plating and was indeed round headed copper nails put into the hull at  intervals  below the water line.  These of course turned green in salt water and were referred to by sailors as "pease" which is the Old Enlgish spelling for the plural of "pea"
 
John

Druxey
 
The term “coating” may need to be treated with some licence, especially in the language of 200 years ago.  In the book on Marine Antifouling from Woods Hole the statement is made “In the 18th century, wooden sheathing was filled with copper nails whose heads touched each other.” The article does not, however, say that this was called “Pease”. 
 
 
You are correct, Druxey, when you say that the typical green colour, which we see on copper rooves only forms in air.  It is probably mainly copper carbonate but the chemistry of the oxidation of copper is complex. Copper oxide is certainly brown but copper chloride which forms in sea-water is bluish geren when in its hydrated form.
 
Anyway, perhaps the more interesting fact is that although this treatment would possibly have prevented the attachment of barnacles and the build up of algal slime, it would not have prevented the ingress of Toredo worms which would attack the wood between the nails.  In fact, first copper plating suffered from a similar deficiency since the worms were able to penetrate the gaps between the plates.  Later a layer of canvas or felt was attached to the hull before the plates were attached so that there was no bare wood for the worms to attack.
 
In fact, I have seen these worms “in the flesh” as it were.  In a previous life I belonged to the Brisbane 18 Footers Sailing Club located on the Brisbane River.  In the early 1980’s we refurbished our wharf involving, among other things, removing the 80 year-old wooden piles and replacing them with concrete ones.  In spite of the original piles being made of Australian hard-wood, the section below the low tide mark was riddled with holes made by Toredo worms.  We could not at first see the worms themselves but when the piles were cut in half the worms were visible and could be prised from their tunnels.  The largest were about half an inch in diameter.  They had a domed carapaceous head and jaws but the intestines and other body parts had no covering of any kind.  I can only describe this part of the animal as resembling a piece of snot.  The largest were about a foot long.  The tunnels were parallel to the grain and seem to be lined with some kind of calcified material, perhaps to prevent them from collapsing. These worms apparently never emerge once they have invaded the timber and spend their whole lives in the sane piece of wood.  How boy Toredo worm meets girl Toredo worm I am not sure but adversity has never been a deterrent for this kind of activity.
 
Incidentally, for those who have never seen an 18 foot sailing boat, it is worth having a look on the web.  They are an unrestricted class of sailing boat and there are only two rules – The boat must be 18 feet long and the race starts at two o’clock.  There have been many developments over the years but they are always grossly over-canvased and capsize at the slightest provocation.
 

 
John

Druxey
 
The term “coating” may need to be treated with some licence, especially in the language of 200 years ago.  In the book on Marine Antifouling from Woods Hole the statement is made “In the 18th century, wooden sheathing was filled with copper nails whose heads touched each other.” The article does not, however, say that this was called “Pease”. 
 
 
You are correct, Druxey, when you say that the typical green colour, which we see on copper rooves only forms in air.  It is probably mainly copper carbonate but the chemistry of the oxidation of copper is complex. Copper oxide is certainly brown but copper chloride which forms in sea-water is bluish geren when in its hydrated form.
 
Anyway, perhaps the more interesting fact is that although this treatment would possibly have prevented the attachment of barnacles and the build up of algal slime, it would not have prevented the ingress of Toredo worms which would attack the wood between the nails.  In fact, first copper plating suffered from a similar deficiency since the worms were able to penetrate the gaps between the plates.  Later a layer of canvas or felt was attached to the hull before the plates were attached so that there was no bare wood for the worms to attack.
 
In fact, I have seen these worms “in the flesh” as it were.  In a previous life I belonged to the Brisbane 18 Footers Sailing Club located on the Brisbane River.  In the early 1980’s we refurbished our wharf involving, among other things, removing the 80 year-old wooden piles and replacing them with concrete ones.  In spite of the original piles being made of Australian hard-wood, the section below the low tide mark was riddled with holes made by Toredo worms.  We could not at first see the worms themselves but when the piles were cut in half the worms were visible and could be prised from their tunnels.  The largest were about half an inch in diameter.  They had a domed carapaceous head and jaws but the intestines and other body parts had no covering of any kind.  I can only describe this part of the animal as resembling a piece of snot.  The largest were about a foot long.  The tunnels were parallel to the grain and seem to be lined with some kind of calcified material, perhaps to prevent them from collapsing. These worms apparently never emerge once they have invaded the timber and spend their whole lives in the sane piece of wood.  How boy Toredo worm meets girl Toredo worm I am not sure but adversity has never been a deterrent for this kind of activity.
 
Incidentally, for those who have never seen an 18 foot sailing boat, it is worth having a look on the web.  They are an unrestricted class of sailing boat and there are only two rules – The boat must be 18 feet long and the race starts at two o’clock.  There have been many developments over the years but they are always grossly over-canvased and capsize at the slightest provocation.
 

 
John

For what its worth, Rod.  The way I do this is to put diluted PVA on the rope loop just before I tighten it onto the block.  This means that the INSIDE of the seizing is soaked in glue. I have never found that the cut off end pulls through.
 
John

Druxey,
This  topic is old now but I read somewhere (not sure where now) that "pease" was a fore-runner to copper plating and was indeed round headed copper nails put into the hull at  intervals  below the water line.  These of course turned green in salt water and were referred to by sailors as "pease" which is the Old Enlgish spelling for the plural of "pea"
 
John

For what its worth, Rod.  The way I do this is to put diluted PVA on the rope loop just before I tighten it onto the block.  This means that the INSIDE of the seizing is soaked in glue. I have never found that the cut off end pulls through.
 
John

You might also consider using a non acidic PVA (white glue).  Products like Weldbond  are quite acidic.  The downside is that the non acidic variety takes longer to dry and I dilute only by about 30 %
 
John

You might also consider using a non acidic PVA (white glue).  Products like Weldbond  are quite acidic.  The downside is that the non acidic variety takes longer to dry and I dilute only by about 30 %
 
John

Mike,
 
I just noticed your post about the slings.  On my plans for Royal Caroline The cross trees actually protrude about 0,5 mm above the support beams so that there is a 0.5mm gap between the top and the cross trees assembly (enough for ropes to pass through).  Of course I did not notice this subtlety and so I have the same issue as you.
 
Regards,
 
John 

I had a recent order which was in the pipeline from Crown Timberyard when the "Store Closed for Maintenance"  sign appeared.  Being concerned about the status of my order I emailed them and received a reply from Julie stating that they were indeed undertaking maintenance but they had also experienced an unexpected illness for one of their children.  She said that they were dealing with all orders which had already been placed.  Indeed my order arrived a couple of weeks later and was of they usual high quality.
 
I know that Jason also has a "day job' but it is a pity that they don't provide a bit more information about when they expect to open again - if ever

I had a recent order which was in the pipeline from Crown Timberyard when the "Store Closed for Maintenance"  sign appeared.  Being concerned about the status of my order I emailed them and received a reply from Julie stating that they were indeed undertaking maintenance but they had also experienced an unexpected illness for one of their children.  She said that they were dealing with all orders which had already been placed.  Indeed my order arrived a couple of weeks later and was of they usual high quality.
 
I know that Jason also has a "day job' but it is a pity that they don't provide a bit more information about when they expect to open again - if ever