today's work

[Das Boot]

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.

[He Who Shall Not Be Named]

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.

So. That's an idea. Show me how please. Meanwhile I'll just putter away with my awful attempts.

[redboat219]

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.

[He Who Shall Not Be Named]

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....Zzzzzzzzz

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

[He Who Shall Not Be Named]

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?

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!

[Rick Teskey]

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....Zzzzzzzzz

[Albacore 569]

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?

[He Who Shall Not Be Named]

Damn, that's a lot of BJB!!!

Yeah. Imagine if I had not put those displacing hunks into the flasks beforehand!

[Davjacva]

Damn, that's a lot of BJB!!!

[He Who Shall Not Be Named]

[He Who Shall Not Be Named]

incorporate prop tubes in the horizontal stabs during final casting?

Stay tuned... same bat-time, same bat-channel.

[redboat219]

incorporate prop tubes in the horizontal stabs during final casting?

[He Who Shall Not Be Named]

Still go into the pot for pressure curing?

Yup. Details on that process to follow...

[redboat219]

Still go into the pot for pressure curing?

[RCSubGuy]

Masterclass on molding and casting complex parts. I love it!