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Who is John Galt? -
Damn, that's a lot of BJB!!!Comment
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So you insert the prop shafts before molding and I assume they are coated with a separator, so they twist free and turn when the casting is taken out of the mold? Or the shafts just rod as part of the casting process with slightly larger diameter & removed after to repeat on other castings - the channel is slightly larger for the actual prop shafts?
Last edited by Albacore 569; 05-27-2024, 10:58 AM.Comment
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Why did you decide way back when (skip jack?) and presently on making stern sections out of cast resin you may have said in the past and I have forgotten or nobody listens to you anyway..?
Could same tool be used ,not the inner displacement plug just the outer skin for grp layup or would cross section be too thin too retain shape?
just kidding about not listening....ZzzzzzzzzComment
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No. What you see are SS rods that form cores to produce the bores in which brass tube stern tubes (that accommodate the propeller shafts) will later be inserted and glued within the cast resin tail-cone. Once the casting cures, I yank out the SS rods and disassemble the tool quadrants to free the casting. I'll be done with the test shots of sail and tail-cone within the hour... stand by!So you insert the prop shafts before molding and I assume they are coated with a separator, so they twist free and turn when the casting is taken out of the mold? Or the shafts just rod as part of the casting process with slightly larger diameter & removed after to repeat on other castings - the channel is slightly larger for the actual prop shafts?
Who is John Galt?Comment
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Ellie and I were 'production' guys; we employed materials and methods that balanced suitability of material to time taken to produce the product. Time is money. (Sometimes she would quip on the phone, to a casual caller: "We're busy making money here... keep it short!". The perfect gatekeeper).
The involved and tight geometry of sail and tail-cone made hollow-casting the production process of choice, though GRP layup would have rendered much stronger structures. Yes, I have on rare occasions done glass layup within resin casting tools, with success, but doing so with such deep draft and tight radius forms requires plenty of gel-coat, followed by light-weight glass, backed up with heavier weave glass -- all very time consuming, but producing exceptionally strong parts, but parts that take forever to produce.
D&E Miniatures started as a resin casting service -- we played to that strength throughout our run.
David
Last edited by He Who Shall Not Be Named; 05-27-2024, 01:26 PM.Who is John Galt?Comment
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Can you incorporate the stern tubes during the casting process? Would having them in place cause problems extracting the casting from the mold?
To prevent resin from entering and blocking the tubes it could be filled with beeswax.Make it simple, make strong, make it work!Comment
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Will the thinness of the shaft space cause problems with running screws? It may be just a bad camera angle I’m seeing. Very nice project.Of the approximately 40,000 men who served on U-boats in WWII, it is estimated that around 28,000 to 30,000 lost their lives.Comment
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Who does one have to blow to get one of these?Last edited by redboat219; 05-27-2024, 08:32 PM.Make it simple, make strong, make it work!Comment
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No problem. The installed stern tubes reside in the solid horizontal stabilizers which have more than enough beef to keep the shafts from wiggling.
This shot of the stern tube core piece -- a length of SS (two of them) -- residing within the cavity that will give form to the stabilizer once the pour is made will be completely encapsulated in resin. Very stout foundation.
DavidWho is John Galt?Comment
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Thank you
looks like an 8 window on back wall behind EllieComment
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Who is John Galt?Comment
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