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Jaager

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  1. Like
    Jaager got a reaction from Bob Cleek in ‘Universal’ Primer   
    Shellac is as close to being a 'universal' primer as can be had.    It is available as flakes and already in solution.
    The flakes are for when a clear finish is the goal and no darkening of the wood is desired.  The solvent is alcohol.  Super Blonde is close to being water clear,
     but the solubility in alcohol is about 1/2 that of Garnet.  If a paint is going over it, it is easier to just purchase is premixed  and dilute it.
    The first coat should a half strength concentration .
    The hows and whys of using shellac have been discussed more than once in this forum.  Bob Cleek has done the best job of explaining, 
    It is a very old and times tested material so it has old measures   - pounds cut - which is pounds of flakes per gallon of alcohol.  I think garnet is 10 lbs cut for saturation which rounds out to being a 10% solution.   Battery operated small scales are not expensive,  so it is easy to weigh out 10 gm and qs to 100 ml with shellac thinner or  5 gm of super blonde and qs it to 100 ml with shellac thinner.
  2. Like
    Jaager reacted to Bob Cleek in Question about painting and staining   
    What Canute said. Stain penetrates the wood, so if shellac seals the wood, stain can't penetrate it. One of the problems to note about staining is that the stain has to be compatible with whatever coating you apply over it, as well. 
     
    I don't want to start a big controversy here, but I can't resist offering my two cents' worth. I'm not a fan of staining on models. There are some times when it might be indicated, on spars, perhaps, or possibly laid decks, but the simple fact is that the real purpose of stain is to make one wood look like another and, like most faux finishes, it may come close, but never hits the mark completely. Stain enhances the figuring of some woods, which is good for furniture, but since there aren't any woods that have grain features that are to the scale of most any model, enhancing the grain of wood on a model is the last thing a modeler should want to do. Some like to portray their models "au natural," without any paint. This style best exhibits the exact construction features of the prototype and the skill of the modeler, with each faying surface highlighted in black and every fastening in its proper place. In that case, the best approach is to use a fine finish wood species that serves the purpose and looks well clearly sealed or lightly oiled or waxed. If it's the beauty of bare wood you want, there's so little wood in a model that there's no reason not to buy the good stuff and show it off. Staining basswood is like trying to polish a turd.
     
    And I'll mention in passing that "wipe on poly" is a rip off. It's just polyurethane varnish that's been thinned, canned, and marketed to consumers who don't know the difference. Thinner is relatively cheap. Buying thinned varnish and paint for the same price as the thick stuff is a waste of money. Thin your coatings yourself and save a bundle.
  3. Like
    Jaager got a reaction from Binho in Strange Hooks on Roman Ships   
    It is always associated with a spar and an attached yard and sail jutting out over the bow.
    Do a mock up and determine what sort of staying lines and retaining structure is needed to make this sail functional.
    Determine if it would require an active human presence at the fore end to handle the sail. 
    This could clear up the function and just how large and strong it would have to be.  It is near impossible to forget how it all evolved over the next 1500 years but the bare minimum is likely to be close.
  4. Like
    Jaager got a reaction from davyboy in Wooden Ship railings -help   
    The core of your problem is due to the species of wood that was supplied,
    If your objective is to assemble the craft using the supplied materials, fight on.
    If your objective is to develop skills and progress to more complex subjects, use this as an opportunity to slip in a bit of scratch building experience.  Replace the supplied wood with a species that will hold up to what is being asked of it.
  5. Like
    Jaager got a reaction from obsidean12 in Wooden Ship railings -help   
    The core of your problem is due to the species of wood that was supplied,
    If your objective is to assemble the craft using the supplied materials, fight on.
    If your objective is to develop skills and progress to more complex subjects, use this as an opportunity to slip in a bit of scratch building experience.  Replace the supplied wood with a species that will hold up to what is being asked of it.
  6. Like
    Jaager got a reaction from mtaylor in Wooden Ship railings -help   
    The core of your problem is due to the species of wood that was supplied,
    If your objective is to assemble the craft using the supplied materials, fight on.
    If your objective is to develop skills and progress to more complex subjects, use this as an opportunity to slip in a bit of scratch building experience.  Replace the supplied wood with a species that will hold up to what is being asked of it.
  7. Like
    Jaager got a reaction from Moab in A small cog c. 1410 by Brinkman - FINISHED - scale 1:20   
    Silverman,
    That planking technique is unique or seems to be.  The illustration clarifies the what and how.  This craft may well be a "missing link" in the transition from shell first to frame first.  
    I wonder if that particular planking joinery may have left something to be desired as far as stability and reliability?  The result of that experiment being the reason it was where it could be found far in its future instead of joining the fate of its fellows? 
    I can see how for everyday full size projects, Fir vs Oak is a choice to consider.  In the scale model world, I recommend forgetting that Oak even exists.
    Oak is hard, but it is also pug ugly at most any model scale.  It may be useful for totally hidden structures.  But a negative factor for even this is that in some species of Oak, the fibers, being coarse, do not hold together at shape edges and the way out of scale pores could be at the edges and leave dips.  They are awful enough on the surface.
    One of my preferred species of wood is a Maple that is fractionally harder than White Oak.  It is no problem as long as tools are sharp, motors are powerful, and for bulling away a bulk of it - 60 or 80 grit sandpaper.  I find that the resistance to being able to easily overdo its removal to be a plus.
    All the more power to you, but the fuzzy nature of a true Fir would have me wanting to act out in frustration.  I find this is much more fun when the species of wood being used works with me, and rewards me in how it looks when replicating something its miniature in scale.
  8. Like
    Jaager got a reaction from Moab in A small cog c. 1410 by Brinkman - FINISHED - scale 1:20   
    Chuck,
    I completely agree about the three carvel strakes and then clinker possibility.  
    It is this interpretation  that I am having a question about.   The same plank going from carvel to clinker along its length?  I can only see it as being one or the other.  If I am right, it saves a lot of work.
     
    There are a couple of clinker projects that are active now.  When I looked up a question on the strake lap transition at the bow and stern rabbets, in a modern text,  (John Leather)  I also checked how the fittings were done.  Were there spikes that just went thru the plank overlap and were clinched on the lower strake's inside face?  It looks like the spikes were only at the frames and went thru the two planks and also the frame and was clinched on the inside face of the frame.  Were there any spikes that went thru one plank and then thru the frame?  No.  It appears that it was only at the overlap.  
     
    My problem with the garboard description was because I have never seen any reference to a garboard having fittings at the rabbet at the keel and thru the plank into the keel.  My question is, why mention the absence of something that was not done in most any situation anyway? 
     
    Thinking about why this would be the situation:
    That seam is the most troublesome of all of them.  It is at the place  where two different planes meet, with different dimensional flexing,  I would guess that spikes could impair garboard reactive movement.  The stress could generate a split along the row of spike holes and turn the garboard from one board into two boards producing a fatal leak.  This happening when the sea was particularly lively.   I recall an illustration a ship suspended between two oncoming waves.  One was holding up the bow and one was holding up the stern, with the middle hanging in the air.  I believe it was about hogging and what could cause it.  
     
     
     
  9. Like
    Jaager got a reaction from Moab in A small cog c. 1410 by Brinkman - FINISHED - scale 1:20   
    The description in the thesis is clear as mud to me.  It does not read as though it was written by someone who understands hull construction.
    You could correspond with him and further define just what he means by:
    "lay flush"  
    "were not fastened to one another" - as opposed to?
    "stakes overlapped"  a picture of what exactly he means
    "the central......garboard....not connected to it."   apart from Med very ancient blind mortise and tenon plank to plank - the attachment is plank to internal structure - the between is for waterproofing material
    "the bottom and bilge strakes..."   is he describing carvel planking where the planks would grind in a beach?  There was a time of transition from clinker to carvel - but I imagined it was between strakes and not within one.  The hull having a carvel planked bottom and lapstrake sides up to the rail. 
     
    About the plug.   The trick is to fix each plank to its final curve before it is attached.  Pre-bent as it were.  This way, they stay were you fixed them.
     
    Plank bending 101
    The lignin that holds wood fibers together is not soluble in water. 
    Heat loosens its bond and allows for bending while hot and staying in its new position when back to room temp.
    Steam transfers heat better than dry air . Wetting wood before bending is to provide steam.  The time of immersion need not be long.
    Different species of wood have very different reactions to being bent.  Some are pliable and some would rather break.
    Lignin is soluble in ammonia.   But it is the anhydrous ammonia that was used for commercial refrigeration and is liable to explode.  The active part of cleaning ammonia solution as far as bending is the water that it is in.  The ammonia there just ruins the surface of the wood and makes it an ugly color.
    There are many ways to provide the heat.  The trick is to choose a way the does not cook you in the process.  Does not char the wood.  Does not dent the wood while bending it.
     
    Your homemade draw plate = 
    to cut/shave the wood,  hard steel = good. 
    stoning and honing a crisp cutting edge at the hole and holding it  hard steel = good
    drilling the hole to begin with  hard steel = not so easy
     
    For draw plate trunnels - bamboo is pretty much it  getting something to draw from wood is too much work and too much is wasted.
    For short - just for show trunnels  you can find examples here of   steel medical needles --  tip ground to be like a lab cork borer -  drill press - stock is a block of wood and boring it on an end grain face.   
    If you drill thru the block, the trunnel is longer, but stays in the bore.  I do not know if boring the next open will push the earlier one up the bore of the needle or just stop the process.  If it moves on up, I guess the quill center could fill with trunnels.  If it does not move, pulling the needle , and ramming the trunnel out for each one would get tedious real fast.  
    The other way is to bore part way and when as many as can be got are bored, the distant end is cut off at the intersection at the depth of cut.
  10. Like
    Jaager got a reaction from Moab in A small cog c. 1410 by Brinkman - FINISHED - scale 1:20   
    Silverman,
     
    Three thoughts:
     
    Your choice of wood:  Fir (the English seem to interchange Fir as a name for what is Pine here, but regardless, similar characteristics for this use.)
    Using a softwood species for frames, planks, beams, chocks, ...   you are making this a more difficult, frustrating, less elegant process than it could be.
    Guys a lot closer to you than to me, seem to have ready access to all the Pear they need.   You would probably really like how it looks and works a lot more than Fir.
    If you want a lighter color,  there is Maple - in your case -  Common Name(s): Sycamore maple, European sycamore  Scientific Name: Acer pseudoplatanus
     
    The planking -  The usual nature of lapstrake/clinker planking  is flush - in a gradual transition - only at the ends.  Are you certain that the middle is flush?
     
    Frame first -  Have you considered making a plug/inside the planking mould?  Planking over that?  Adding the frames to the inside of the hull?
     
    I will be subjected to stoning,  but if a Byrnes draw plate costs more than is in your comfort zone ( I own one, so it is not about quality)  drill gauges can do the job.
    Here, wire gauge drills,  there are two   necessary  #80 to #61   and # 60 to ~1/4" not sure - but only the #50's really matter.
    Bamboo skewers can make strong trunnels.  The species of Bamboo used can make a big difference in how easy it goes. 
    hard strong holds together needs a lot of force
    hard brittle fights you all the way low vield
    soft holds together peels off with less work - do not hammer -push
    soft splits easily crushes  not worth the effort
    This may require visiting different vendors  -  if you have a local independent Chinese grocery store - there may be several types available as well as Bamboo chopsticks
    Gripping the bloody things - to pull them thru - without crushing - a constant challenge.
     
  11. Like
    Jaager got a reaction from mtaylor in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    Starfoam is how coworkers who were from eastern KY pronounced Styrofoam.  (The patient water glasses at our VAMC were actually beaded starfoam cups.) 
    A door with hinges at the top - to seal the storage cubby.   When I imagined this solution, I envisioned the opening as being pentagonal - and thought that two half doors would do the job - but it looks like you finished it to be rectangular, so one will do.
    A loop of bungee cord for a handle - a gaff hook to pull it open and place the loop in the hook that keeps it open.
     
    American Science & Surplus  has a tube of 29 plain donut magnets for $6.00.  They are strong enough to keep a seal if paired and 4 or 5 sites are used.
    The only downside is the spam catalogs - but the paper is the right stuff for starting a fireplace log. 
  12. Like
    Jaager got a reaction from mtaylor in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    I would give serious thought to using a sheet of 2"  Starfoam (E.KY) insulation.  It probably only comes as 4x8.
    One sheet may get you a double layer. 
    Hinge it along the top edge.  A long pole can keep it open or a distal hook in the ceiling and a loop with the sheet.
    It may require 1/4" ply to hold the hinges.  It is porous enough for PVA to hold it all together.  LiquidNails also works.  Weather stripping along the border and strong magnets at few points to hold it all closed tight.
  13. Like
    Jaager got a reaction from Hank in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    Starfoam is how coworkers who were from eastern KY pronounced Styrofoam.  (The patient water glasses at our VAMC were actually beaded starfoam cups.) 
    A door with hinges at the top - to seal the storage cubby.   When I imagined this solution, I envisioned the opening as being pentagonal - and thought that two half doors would do the job - but it looks like you finished it to be rectangular, so one will do.
    A loop of bungee cord for a handle - a gaff hook to pull it open and place the loop in the hook that keeps it open.
     
    American Science & Surplus  has a tube of 29 plain donut magnets for $6.00.  They are strong enough to keep a seal if paired and 4 or 5 sites are used.
    The only downside is the spam catalogs - but the paper is the right stuff for starting a fireplace log. 
  14. Like
    Jaager got a reaction from 42rocker in Byrne's Saw Reference (also good for other desktop hobby saws)   
    If the object is to be able to get a precise and reproducible  saw tilt and this will be done frequently with multiple possible angles being cut:
     
    Fix the machine to a two plywood sheet base.
    Lower is a 1/2" - 3/4"  sheet.  width 3" or more wider than saw base on each side.
    Upper is  1/4" sheet
    The right edge of upper sheet is at the right side of the saw base.
    The upper sheet is attached to the lower using a full size piano hinge.
    The left side is as far beyond the base of the saw as is needed to fix a a threaded rod and thumb screw or wingnut to raise that edge.
    There would probably need to be spacer pieces at the hinge and outer edges of the upper sheet that are a tad thicker than the thumb screw/wingnut.
     
    Someone really OCD could fix the angle gauge from a adjustable miter -  or a stick with marks  at the front right at the hinge.
     
    The down side is that it adds weight to an already hefty machine.
    A 1" rubber stopper fixed under each corner of the base will provide space for fingers to lift the machine, if it just rents bench space and lives on a shelf.
  15. Like
    Jaager got a reaction from Cuda1949 in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    I would give serious thought to using a sheet of 2"  Starfoam (E.KY) insulation.  It probably only comes as 4x8.
    One sheet may get you a double layer. 
    Hinge it along the top edge.  A long pole can keep it open or a distal hook in the ceiling and a loop with the sheet.
    It may require 1/4" ply to hold the hinges.  It is porous enough for PVA to hold it all together.  LiquidNails also works.  Weather stripping along the border and strong magnets at few points to hold it all closed tight.
  16. Like
    Jaager got a reaction from Canute in BUYING A "PAINT SET"   
    Some of the old books about how-to model ships suggest dry pigments (Japan?)
    I wonder if the dry or oils are minerals and the acrylics are organic? 
    The chemical industry started with the synthesis of organic pigments.  But complex organic molecules are much more subject oxidation than minerals, some of which may already be oxides.
    As a practical matter on the subject of the desirability of using archival materials, although I completely agree with you, I suspect that the issue will soon prove to be a moot one.  We have already passed an inflection point and show no indications of having the will to do what is necessary to avoid generating one or two more.
  17. Like
    Jaager got a reaction from Canute in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    Starfoam is how coworkers who were from eastern KY pronounced Styrofoam.  (The patient water glasses at our VAMC were actually beaded starfoam cups.) 
    A door with hinges at the top - to seal the storage cubby.   When I imagined this solution, I envisioned the opening as being pentagonal - and thought that two half doors would do the job - but it looks like you finished it to be rectangular, so one will do.
    A loop of bungee cord for a handle - a gaff hook to pull it open and place the loop in the hook that keeps it open.
     
    American Science & Surplus  has a tube of 29 plain donut magnets for $6.00.  They are strong enough to keep a seal if paired and 4 or 5 sites are used.
    The only downside is the spam catalogs - but the paper is the right stuff for starting a fireplace log. 
  18. Like
    Jaager got a reaction from Canute in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    I would give serious thought to using a sheet of 2"  Starfoam (E.KY) insulation.  It probably only comes as 4x8.
    One sheet may get you a double layer. 
    Hinge it along the top edge.  A long pole can keep it open or a distal hook in the ceiling and a loop with the sheet.
    It may require 1/4" ply to hold the hinges.  It is porous enough for PVA to hold it all together.  LiquidNails also works.  Weather stripping along the border and strong magnets at few points to hold it all closed tight.
  19. Like
    Jaager got a reaction from Canute in Early use of cannon at sea   
    I believe that the Physics involved would require sideways movement with both fixed guns and guns that recoil. The amount of movement and if it was enough to be observed is another factor altogether.  The greater mass of the ship and the resistance of the water suggest that when the equations are run, the number would be a small one.  Today, with our tech, a real number could be measured.  It might be  mm or cm  but the force has to go somewhere.  If it were localized at the points of attachment to the side of the ship, it would be just compression of a small volume of wood that absorbed these forces.  The body of the ship is a series of interlocking components that were built to transfer and diffuse these significant forces.
  20. Like
    Jaager got a reaction from Bob Cleek in BUYING A "PAINT SET"   
    Some of the old books about how-to model ships suggest dry pigments (Japan?)
    I wonder if the dry or oils are minerals and the acrylics are organic? 
    The chemical industry started with the synthesis of organic pigments.  But complex organic molecules are much more subject oxidation than minerals, some of which may already be oxides.
    As a practical matter on the subject of the desirability of using archival materials, although I completely agree with you, I suspect that the issue will soon prove to be a moot one.  We have already passed an inflection point and show no indications of having the will to do what is necessary to avoid generating one or two more.
  21. Like
    Jaager got a reaction from Nirvana in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    I would give serious thought to using a sheet of 2"  Starfoam (E.KY) insulation.  It probably only comes as 4x8.
    One sheet may get you a double layer. 
    Hinge it along the top edge.  A long pole can keep it open or a distal hook in the ceiling and a loop with the sheet.
    It may require 1/4" ply to hold the hinges.  It is porous enough for PVA to hold it all together.  LiquidNails also works.  Weather stripping along the border and strong magnets at few points to hold it all closed tight.
  22. Like
    Jaager got a reaction from Hank in Converting a Backyard Shed into a Model Workshop   
    Hank,
     
    I would give serious thought to using a sheet of 2"  Starfoam (E.KY) insulation.  It probably only comes as 4x8.
    One sheet may get you a double layer. 
    Hinge it along the top edge.  A long pole can keep it open or a distal hook in the ceiling and a loop with the sheet.
    It may require 1/4" ply to hold the hinges.  It is porous enough for PVA to hold it all together.  LiquidNails also works.  Weather stripping along the border and strong magnets at few points to hold it all closed tight.
  23. Like
    Jaager got a reaction from Old Collingwood in BUYING A "PAINT SET"   
    Some of the old books about how-to model ships suggest dry pigments (Japan?)
    I wonder if the dry or oils are minerals and the acrylics are organic? 
    The chemical industry started with the synthesis of organic pigments.  But complex organic molecules are much more subject oxidation than minerals, some of which may already be oxides.
    As a practical matter on the subject of the desirability of using archival materials, although I completely agree with you, I suspect that the issue will soon prove to be a moot one.  We have already passed an inflection point and show no indications of having the will to do what is necessary to avoid generating one or two more.
  24. Like
    Jaager reacted to Matle in Early use of cannon at sea   
    You are, of course, correct. When I said it wouldn’t move, I meant that any sideways movement would be  insignificant, negligible - not that it would be absolutely 0. 
  25. Like
    Jaager got a reaction from mtaylor in Early use of cannon at sea   
    I believe that the Physics involved would require sideways movement with both fixed guns and guns that recoil. The amount of movement and if it was enough to be observed is another factor altogether.  The greater mass of the ship and the resistance of the water suggest that when the equations are run, the number would be a small one.  Today, with our tech, a real number could be measured.  It might be  mm or cm  but the force has to go somewhere.  If it were localized at the points of attachment to the side of the ship, it would be just compression of a small volume of wood that absorbed these forces.  The body of the ship is a series of interlocking components that were built to transfer and diffuse these significant forces.
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