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Pat, Try this one www.morristech.com these guys are at the forefront of "part printing".
Bill Jepson
-----Original Message-----
From: Pat Panzera <editor.contactmagazine@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, May 5, 2011 3:40 pm
Subject: [FlyRotary] Re: 'open source' parts
Sand casting aluminum produces a way worse finish than 3D printing.
Worse case is that you have to do some mild polishing of the runners,
if indeed the fine parallel lines cause any negative anomalies.
On Thu, May 5, 2011 at 3:30 PM, H & J Johnson <hjjohnson@sasktel.net> wrote:
Hey there Charlie. The technology to produce parts from a substance vs out
of it [ie; additive fabrication rather than subtractive] is pretty new.
There are some forms of accomplishing the job but they are not that cost
effective today [any new technology is this way at the start usually]. The
other limitation I've seen is the quality of surface finish. My main
exposure has been in reading about it and from the articles I've seen there
is generally a secondary machining operation required to get the parts to
dimension. That is all fine on simple parts but something like a manifold
brings new challenges as the interior of the various sections need to be
smoothed out to get clean and consistant airflow. I think the time and cost
of these two areas might preclude us using it at this point, however as
things improve and the tech gets more affordable, this will become the way
things are built in the future. Imagine if everything that was ever built
had a 95% reduction in waste fro m how it's built today. Your car would be
alot cheaper to buy, etc etc.
I love thinking outside the box... [it's how I was able to build my own cnc
mill!]
Jarrett Johnson
www.innovention-tech.com
----- Original Message -----
From: Charlie England <ceengland@bellsouth.net>
Date: Thursday, May 5, 2011 12:53 pm
Subject: [FlyRotary] 'open source' parts
I'm excited to see all the activity on the accessory cover/adapter
plate, & don't want to divert any attention. But Ed's post several
days
ago describing how he made his intake manifold triggered a thought
that
might need to go on the shelf for next action.
The original idea that started all this was an intake manifold. My
intent is to use a very simple manifold similar to Tracy's Otter
manifold, but for those who need a more complex layout, what about
this:
If Jarrett, or anyone else on here, has access to one of the new
'3D
printers', doing a manifold should be a piece of cake for anyone
with
CAD skills (it ain't me...). Apparently, there are 3D printers
that can
use all manner of materials now. I wonder if you could 'grow' an
aluminum or other light/strong/chemical resistant manifold
directly in
the printer. Something similar to the plastic coiled tube
manifolds on
new V8's comes to mind.
OK, back under my rock....
Charlie
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