[AR] Re: [AR] Re: Open Source Igniter / Rocket
- From: "" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "gnsortino@xxxxxxxxx" for DMARC)
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Thu, 12 Feb 2015 12:34:18 +0000
Shapeways SS is not porous. I’ve pressure tested it up to 2000psi without
noticing any leaking. The challenge is building internal geometry as the 2 step
printing process leaves a powder residue that if not cleared out will sinter
and block internal passageways. The SLS process is very good and quite cheap
for simple parts like igniters.
From: RM
Sent: Wednesday, February 11, 2015 9:49 PM
To: arocket@xxxxxxxxxxxxx
$15 is pretty darned attractive. How did it work? I think I recall that Paul
Breed found that the Shapeways sintered/infused stainless was too porous for
his liking.
On Tue, Feb 10, 2015 at 2:37 PM, Lloyd Droppers <ldroppers@xxxxxxxxx> wrote:
I did see your pr56 igniter, and I like it. Frankly I like the work on your
website from the valves to the 3d printed chamber, and you we're one of the
inspirations for me to post my own open source rocket work.
I had initially looked at making the igniter conventionally machine, but when I
looked at Shapeways with a $15.00 price and 2 week leadtime for the igniter I
had to give that a try first.
Lloyd
On Tue, Feb 10, 2015 at 1:36 PM, RM <rocketmoonlighter@xxxxxxxxx> wrote:
Very cool Lloyd.
I posted my latest design iteration of my igniter a few months back
http://www.rocketmoonlighting.com/projects/pr56-igniter
It looks similar in design to yours, but the body is conventionally machined.
The fully dimensioned drawing is on the page for download. I've tested it
with gox/propane, gox/kerosene, and n20/propane.
I have an extra body ready to go if anyone would like to try it out
RM
On Friday, February 6, 2015, Lloyd Droppers <ldroppers@xxxxxxxxx> wrote:
Hi aRocket, you've been pretty quiet lately so I thought I would add something
to the mix. I've been working for the past couple months on an open source
liquid powered rocket , and I thought the list might be interested.
- 3d printedGOX / IPA igniter up and running
- All the igniter documentation (CAD / Arduino / P&ID) and some design codes
are on the website
- I'm doing a once a day Instagram (ProcectEarendel) for various rocket doodles
and project related picture
- And a Kickstarter to try to build a suborbital test vehicle.
Hope that you all find it interesting, after 10 years building rockets for
other people, it is fun to do my own thing that I can share.
Lloyd
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