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    1. Kit: ME, by (Yearly Subscriber) MODEL A MODEL is offline
      Builder Last Online: Jan 2019 Show Printable Version Email this Page
      Model Scale: 1/4 Rating:  Thanks: 2
      Started: 06-09-17 Build Revisions: Never  
      Supported Attribution Scratch Built

      Mieaux vaut tard que jamais! (Better late than never!)

      Well, its been a very long time since I last finished a model! The Beatles were still hoped to reunite! and Nixon was just about to be toppled!
      (Also, this is my first scratch built A Model A Model, (finally!) model!)

      Both of the above statements are true, however, I have studied model making my whole life, and been around it and model makers, since I was just a little Donald. I was the manager of Paul Freiler's Historical Models for half my life, at the time I left it. I then did a too short stint making models for the movies. I worked in Northrops display model group for a few months, and I have been working in the concept car field for nineteen years!

      I am afraid that I might have been "Hijacking" some of your threads, I do go on and on! but never of course was that my intent, and if I have offended anyone? please accept my apologies!

      All that said, here I go!


      A Model A Model, (finally!)
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  1. MODEL A MODEL's Avatar Yearly Subscriber
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    don
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    A Model A Model, (finally!)
    Almost there! This is the smaller half of my mold, and it has the thinner A Model A Model, (finally!) walls. It has only to shrink 2mm more to have achieved 15% shrinkage. The shrinkage on this half has been evening out. I did make many cuts into the outside surface to increase the surface area, and improve upon the de-gassing of the mineral spirits A Model A Model, (finally!) .

    The other half continues to shrink as well, but not at the same rate.

    Maybe another week?




    A Model A Model, (finally!)
    -craftsmanship is a lifelong project of
    self-construction and self determination
    QUOTE QUOTE #77

  2. Roger Zimmermann's Avatar Yearly Subscriber
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    Roger
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    What an expriment!
    QUOTE QUOTE #78

  3. MODEL A MODEL's Avatar Yearly Subscriber
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    don
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    A Model A Model, (finally!)
    Well, the shrinkage seems to have leveled off at around 13%. -I poured a "fast cast" to better evaluate the progress, and to give myself something to work with. -I should have planned this better, but it turned out OK.

    Besides a little clean up, I need to thicken the wings, and maybe a little enhancing of some details. -the wings will grow thinner A Model A Model, (finally!) with each shrinking, and would be as thin as a razor with the next casting A Model A Model, (finally!) , so, I have to bow to practicality over scale.


    Researching this technique further, I have found out that besides Mineral Spirits A Model A Model, (finally!) , Naptha, Toluene, and Xylene can be used. -and that shrinkages as much as 75% may be possible! The important consideration is to measure volumes and not weight.

    Supposedly:

    a 75% reduction could be achieved by mixing 1 part catalyzed A Model A Model, (finally!) RTV A Model A Model, (finally!) with 3 parts solvent.
    60% reduction = 1 part catalyzed A Model A Model, (finally!) RTV A Model A Model, (finally!) with 2 parts solvent,
    and, so on . . .

    We'll see.


    A Model A Model, (finally!)
    -craftsmanship is a lifelong project of
    self-construction and self determination
    QUOTE QUOTE #79

  4. MODEL A MODEL's Avatar Yearly Subscriber
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    don
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    A Model A Model, (finally!)
    Well? It has been too long since I worked on anything! I still have a lot more molding and casting A Model A Model, (finally!) to do with my incredible shrinking quail, -But, today I re-started playing with my hydraulic press, and the pattern I made,?, I forget when I made that. -anyway, I have bought some Nickel-Silver, (Thank you Markus!)

    And today I thought to play.

    I purchased some sheet 0.032" or 0.813mm (hard). -In Copper or Aluminum, this thickness would not be an issue. But I didn't know about Nickel-Silver.

    Also bought some bar stock, 1" and 1/2", and 1/8th" to play with on the lathe. I have ordered some "Dead soft" sheet, but it won't show for another week!

    I was expecting to destroy my pattern, the Nickel-Silver seems so hard, I did my best to anneal carefully, and to my surprise! my plexi-glass pattern worked!

    I am making another pattern out of Aluminum this time, and will try it with the "Dead-Soft" sheets when they show.

    This first picture is of the Nickel-Silver's first pass through my press. I did anneal it before pressing, and before every other subsequent pressing, or hammering, or even cutting and grinding. I was a little paranoid about fatigue cracks.

    A Model A Model, (finally!)-img_6639-2-jpg

    This second picture was taken after several cycles of pressing, annealing, trimming, pressing , more annealing, and some hammering thrown in on a "as I guessed I needed to" basis.

    A Model A Model, (finally!)-img_6642-jpg

    And, this last picture is of the moment when a tortured piece of metal, starts to look like a usable part. An instrument cluster.

    A Model A Model, (finally!)-img_6650-jpg

    I still have a lot of fine tuning to do, but I can see the potential. I do recommend trying Nickel-Silver, or as Markus would say "German-Silver", -it polishes up very nicely, and it looks like Stainless Steel. (however, metalurgically speaking it should be considered a Brass, with 18% Nickel.) (The alloy that I have is #752.)

    Drilling, sawing, soldering just like Brass. It should turn the same, we'll see.

    I also bought an ingot of Zinc, and want to do some casting A Model A Model, (finally!) with sand A Model A Model, (finally!) , and investment type molds. -I thought of a technique a few years ago, that I never tried, and I found out recently, that "my" technique is actually used commercially!

    2019 may be fun yet!

    PS- I also need to look into etching and/or engraving this stuff! Ferric Chloride should work? (I never trust the word "should")

    PPS- I did solder some bits together, soft solder with my resistance soldering unit, and then took them into work and sand A Model A Model, (finally!) -blasted them. The appearance is much like Cast Iron, or a work-aged Aluminum casting A Model A Model, (finally!) . I have only one grit at work, but different media, coarseness, will create different effects.


    A Model A Model, (finally!)
    Last edited by MODEL A MODEL; 01-03-19 at 04:44 AM.
    -craftsmanship is a lifelong project of
    self-construction and self determination
    QUOTE QUOTE #80

  5. MODEL A MODEL's Avatar Yearly Subscriber
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    don
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    A Model A Model, (finally!)
    I have already started on a new and better pattern, this one out of Aluminum. I will change the orientation some, and I need to be a little more careful about some of the details.

    A Model A Model, (finally!)-img_6653-2-jpg

    The "Dead-Soft" sheets did show up today, and in addition to being "soft" they are also half the thickness of this, my first try. -The Nickle-Silver is a pretty good color match, for the original 1930/31 instrument cluster. (the original clusters were Nickle plated A Model A Model, (finally!) .

    A Model A Model, (finally!)-size-fourth-scale-2-jpg

    Looks like I'm going to be busy this weekend.


    PS- Many years ago I picked up a small pantograph, and it is my hope that I will be able to use it with the actual article to engrave all those lines, and establish the locations of the holes. (my hope.)

    PPS- I spent a good part of yesterday grinding and filing a new pattern. -and reworking my first pressing. Becoming more confident in the use and abuse of Nickel Silver. I do recommend its use. If the subject your modeling originally had a Stainless Steel or Nickel Plated A Model A Model, (finally!) radiator, try working in Nickle Silver.

    A Model A Model, (finally!)-img_6661-jpg

    The above is one piece of Nickle Silver, formed just as the prototype article was. - Presented here after having been annealed, formed, trimmed, annealed, trimmed, ground, filed, annealed, many, many tines. To see how far I could go, I took it up to a high polish, then decided to rework some surfaces and contours, imbedding it into my pitch bowl, reworking it, and repeating the whole process yet again. Stopping short of a high polish.

    Again, this stuff should be called White Brass, as it is an alloy of Copper 60%, Zinc 20%, and Nickle 20%. (actually this alloy is 65/17/18) -and it has all the characteristics of Brass. Drill, file, sand A Model A Model, (finally!) , turn and soldering the same. Polishes up very easily, and then looks like Stainless Steel, or a Nickle Plating.


    A Model A Model, (finally!)
    Last edited by MODEL A MODEL; 01-09-19 at 03:33 AM.
    -craftsmanship is a lifelong project of
    self-construction and self determination
    QUOTE QUOTE #81

  6. MODEL A MODEL's Avatar Yearly Subscriber
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    don
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    A Model A Model, (finally!)
    Every lunch break this week, I have been slowly dialing in my new pattern. -a lot of subtle curves. Trying to keep everything balanced.

    A Model A Model, (finally!)-pattern-hydraulic-press-jpg

    A Model A Model, (finally!)-little-filing-grinding-sanding-jpg

    Initially blocked out with a band-saw, a little help from my Dremel A Model A Model, (finally!) tool, and then just a lot of rolled up sandpaper, and elbow grease.


    I intend to use this pattern with the "dead soft" Nickle-Silver sheets, make several pressings, experiment with etching, and engraving. - I'll have to assemble my pantograph first, actually I have to find all the parts to the pantograph, and assemble it and then figure out how to make it do what I want!


    A Model A Model, (finally!)
    Last edited by MODEL A MODEL; 01-10-19 at 02:12 PM.
    -craftsmanship is a lifelong project of
    self-construction and self determination
    QUOTE QUOTE #82

  7. MODEL A MODEL's Avatar Yearly Subscriber
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    don
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    A Model A Model, (finally!)
    Started late today, finished my aluminum pattern, annealed and pressed the thinner A Model A Model, (finally!) sheet stock, trimmed one too short, but it's all a learning process.

    A Model A Model, (finally!)-img_6683-2-jpg

    A Model A Model, (finally!)-img_6694-jpg

    A very different experience working with this thinner A Model A Model, (finally!) stock. I had a less delicate feel with my first attempt.

    A Model A Model, (finally!)-img_6691-2-jpg

    A cold and wet day, and someone nearby must have startled a skunk! Unpleasant to be working out back so I spent most of the day rereading my books.

    A Model A Model, (finally!)-img_6700-2-jpg

    A Model A Model, (finally!)-img_6711-2-jpg


    A Model A Model, (finally!)
    -craftsmanship is a lifelong project of
    self-construction and self determination
    QUOTE QUOTE #83

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