The Bucket Foundry

[WilDun]

Slider exhausts. Finally getting some time.

This is the newly devised Oz cone forming method, called Hindenburging.

Well I reckon you're quite a good Hindenburger - and artistic. I don't think I could copy that effect!.
What will the gases think? - bet they won't even notice, they'll be too busy trying to get their heads around the changing port timing.!

[Flettner]

Now to sort this mess out.

[WilDun]

Just trying to think ....."cavity "is the grey stuff? - but trying to visualize how exhaust and inlet cavities are arranged, where they go and what they align with, may take a little time (at least for me!).- but I'll get there!

Too much for my old brain ...... you'll just have to send me a detailed drawing!

[Flettner]

Just trying to think ....."cavity "is the grey stuff? - but trying to visualize how exhaust and inlet cavities are arranged, where they go and what they align with, may take a little time (at least for me!).- but I'll get there!

Too much for my old brain ...... you'll just have to send me a detailed drawing!

All the tapered sticky out bits are core prints, sand against sand, molten aluminium can not go there. These are to hold the cores in place.
The cavities you see can either be just sealed off, cast solid or I could make it hollow to save weight and cast better. Thick bits like this in the middle of thin bits all around is generally not a good idea. At the end of the day how much time do you spend on a test piece anyway.
A drawing ?? I learn't years ago that is a process you can do without, just a wast of time. You will see when I build the sand mold up.

[WilDun]

All the tapered sticky out bits are core prints,
A drawing ?? I learn't years ago that is a process you can do without, just a wast of time.

Yes, you have just answered the questions I was about to ask (eg coreprints etc.) and I guess the inner tapered knob and the concentric ring on the top of the pattern are both coreprints to support the inner cavity cores (as in your first photo). But mainly it is the layout of the ports which intrigues me and trying to figure out the convoluted passages.
As I see it, that pattern and cores takes a lot of thought and a lot of removable sections to achieve satisfactory results! - very interesting.
I knew of course you wouldn't be using drawings as such and if you did, I'm sure you would to keep them to yourself! (always a good policy!).

Also, I guess you will only have to make one corebox each for the inlet and exhaust cavity cores? ie assuming that each exhaust is identical to the others, the same thing in the case of the inlets?

[Flettner]

Almost there, a few holes to fill in and a decision on what to do underneath. Core boxes with respective core shapes.

[Frits Overmars]

Ah, finally something in those pictures of yours that I recognize: the hot glue gun. Marvellous invention; I'm putting my car back together with it .

[WilDun]

Almost there, a few holes to fill in and a decision on what to do underneath. Core boxes with respective core shapes.

Thanks Neil, Now everything is clear! the most confusing thing (at first sight) in the earlier pictures is the addition of the coreprint patterns which often are just as big as the cores themselves! - ok, now you can carry on, I've caught up.

[Flettner]

Yes, should have hidden that, not what a real patternmaker uses. Or mechanic in your case Frits.

[ken seeber]

Maybe Frits has got one of his mate’s power piped Trabbies and the only glue that sticks to the placky door panels is from the hot glue gun.

[WilDun]

Yes, should have hidden that, not what a real patternmaker uses. Or mechanic in your case Frits.

John Britten used one to glue together the aluminium wire to form the mesh he made up for holding the clay on his fairing pattern.

[Frits Overmars]

Maybe Frits has got one of his mate’s power piped Trabbies and the only glue that sticks to the placky door panels is from the hot glue gun.

You might be right about nothing else sticking to those panels, but I don't own a Trabbie. I've been playing with the idea of getting one and putting in a Rotax E-TEC engine. No-one would hear the difference while waiting for the traffic lights .
But then a mate took me for a ride in a race-winning Trabant and that cured me completely. Doing 160 kmh on a 4 meter wide rural road in a 'car' with no wheelbase, suspension or brakes to speak of is not my idea of being in control.

[Flettner]

The bottom filled in, core prints sticking out. Paint is good for highlighting blemishes.

[Flettner]

So the granddaughter wants to know how stuff is made, well she probably regrets asking now but 'we' decided to build (cast) a rocket, maybe the German in me? But anyway WE will up date with pictures of progress. Hot glue gun next. Top will be made in the CNC and screwed on.

[Frits Overmars]

So the granddaughter wants to know how stuff is made, well she probably regrets asking now but 'we' decided to build (cast) a rocket, maybe the German in me?.

In case you need a colour scheme:


Or maybe the German in you would prefer this: