SpaceBanter.com - View Single Post - Towards the *fully* 3D-printed electric cars.

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On Wed, 05 Jul 2017 19:28:43 -0700, Fred J. McCall
wrote:

wrote:

On Wed, 05 Jul 2017 11:11:31 -0700, Fred J. McCall
wrote:

wrote:

In sci.physics Jeff Findley wrote:
In article ,
says...
Landing gear, and all other structural moving parts, is surely another
area on aircraft which could use this technology. Landing gear make up
a significant percentage of an aircraft's total dry mass, so this would
be a likely candidate for shape optimization and 3D printing.

Again, you are talking about niche applications and landing gear are not
that big a part of an aircrafts weight.

From Wikipedia (because I don't have time to look up a "better" source):

The undercarriage is typically 4-5% of the takeoff mass and can
even reach 7%.

That's significant in aerospace.

Have you ever looked at the interior structures of an aircraft?

Yes, many times. I've got a b.s. in aerospace engineering, so I know
the basics. Many of our customers are aerospace, so I have to
understand the domain.

3D printing is, and always will be, a niche manufacturing method.

Handy at times, but certainly not a world changer.

This is quite short sighted. I'm sure the same was said about
composites when they were in their infancy. Today it would be quite
hard (i.e. likely impossible) to point to something commercial that
flies and carries people commercially that has absolutely zero composite
content.

An irrelevant red herring to the subject of 3D printing. There are a HUGE
number of different composite materials out there and it has taken well
over half a century for most aircraft to have even a small fraction of
composite materials in their construction.

Note the word "most".

How is an example of the adoption of new materials/manufacturing
processes not applicable to 3D printing which is another example of the
same thing? Are you deliberately being intellectually dishonest?

Well, if you want to compare composite materials and 3D printing, composite
materials have been around for over a half century and the usage is still
trivial compared to traditional materials in just about all products other
than camper shells and ski boats.

Jesus, get back to your trailer park until you gain some experience in
the real world.

Precisely what do you disagree with in the sentence?

"composite materials have been around for over a half century and
the usage is still trivial compared to traditional materials"

I disagree that you have included his entire thought. Given his
sphere of knowledge of the use of composites, which he calls out as
"camper shells and ski boats", he's obviously trailer trash.

So, because camper shells and ski boats are made out of composites,
he's trailer trash. Got it.

Composites are widely used all over the place. Many of them the Chimp
probably thinks of as 'traditional materials'. Both concrete and
mortar are composite materials and we've been using that stuff since
the Romans. Composites of various types are used all over the place,
from piping to appliances to aircraft to construction materials.

Oh, good grief. I suppose you're going to tell me that a concrete
pump is a 3-D printer, too.

So we can expect 3D printers to still be niche in 50 years.

Well, YOU can no doubt expect that, but you're pretty well known for
having your head up and locked.

Seems like someone insulted your binkie.

Every time we see the Chimp around here he is arguing a stupid
position adamantly. Perhaps you and he should get a room?

You should look in a mirror, kid.