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Fun with CAD

zilspeed - 17/10/10 at 09:55 AM

Seeing as I learnt a couple of new techniques from a thread in here the other day, I've been playing with them in CAD.

I give you, inlet and exhaust manifolds for a 5 cylinder engine complete with 5 into 1 collector.
Had to do a 5, just because.

Now, how do I make them.

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Incidentally, the inlet manifold design is pretty atrocious, the outer cylinders would be seriously starved.
It was just fun using the loft / union / subtract and extrude commands.

renrut - 17/10/10 at 10:29 AM

That's the beauty of CAD, anything you can think of you can draw, but it doesn't mean you can make it. That's where the technical skills come in.

Although looking at those there is nothing there that can't be made. Have a look at the intake manifold for a Jag V6, very complex shape but its a single casting. I'm not entirely sure how they make them.

zilspeed - 17/10/10 at 01:06 PM

quote:
Originally posted by renrut
That's the beauty of CAD, anything you can think of you can draw, but it doesn't mean you can make it. That's where the technical skills come in.

Although looking at those there is nothing there that can't be made. Have a look at the intake manifold for a Jag V6, very complex shape but its a single casting. I'm not entirely sure how they make them.

I take your point entirely.
What I'm working on in my head is thinking of how to make the jump between being able to draw something and being able to make it.

I've redone the collector, but with it in mind from the start that I wanted to cut it into 5 slices. So my base was a pentangle and all the slices were based on that.

We now end up with some small parts that are perfectly capable of being made.

I know exhaust manufacturers have been doing this for years, but I think the only place I've seen it done quite like this was an inconel exhaust on an F1 car or a V8 powered hillclimb car.

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