[SS2S-Main] Re: Material for Nozzle fabrication

  • From: Vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx>
  • To: "sugarshot@xxxxxxxxxxxxx" <sugarshot@xxxxxxxxxxxxx>
  • Date: Tue, 6 May 2014 17:24:40 +0200

Hi Hayk,
If you use graphite for the the nozzle, Can save the resulting powder,  to use 
it in our experiments?
CheersVicente Alvero
Date: Tue, 6 May 2014 06:13:59 -0700
From: dmarc-noreply@xxxxxxxxxxxxx
Subject: [SS2S-Main] Re: Material for Nozzle fabrication
To: sugarshot@xxxxxxxxxxxxx

Thank you all for the good advise. I will let you now how it all goes.
-Hayk     On Tuesday, May 6, 2014 4:00 AM, "dmarc-noreply@xxxxxxxxxxxxx" 
<dmarc-noreply@xxxxxxxxxxxxx> wrote:
    Strangely enough, the mid-grade (medium-grained) graphite tends to do the 
job better than the high-end, fine-grained material.  Less erosion, perhaps due 
to larger grains interlocking better and being ablated more slowly.  And of 
course, less expensive.

Graphite's definitely the way to go, but you don't want conductive, fine dust 
getting into any electronics (such as a benchtop mini-lathe) so try to capture 
the dust at its source.  

Mark L.



-----Original Message-----

From: Hayk Azatyan <dmarc-noreply@xxxxxxxxxxxxx>

To: sugarshot <sugarshot@xxxxxxxxxxxxx>

Sent: Tue, May 6, 2014 5:53 am

Subject: [SS2S-Main] Re: Material for Nozzle fabrication

Thanks for your input Jeff. Where do you recommend I buy graphite from?




  On Monday, May 5, 2014 4:58 PM, Jeff Moore <tnetcenter@xxxxxxxxx> wrote:



Graphite would probably be the most affordable of materials to use.  We had a 
machinist in our local group at one point and he made a titanium nozzle as a 
proof of
 concept.  That would more than likely be rather pricey for this project ( his 
was for a 54mm motor).

Aluminum is a good material to practice on or do mockups with, but I suspect 
that it's melting point is way too low to be used as the actual nozzle.  It 
might work as a carrier for a graphite or ceramic insert though.

Jeff Moore 

Bend, Oregon

On Mon, May 5, 2014 at 4:10 PM, Hayk Azatyan <dmarc-noreply@xxxxxxxxxxxxx> 

Hello all,

        Would you all happen to know where I can get my hands on some scrap 
circular steel bars for rocket nozzle fabrication?And if you have any 
suggestions on the material I should
 use please let me know. I have already started using the lathe, and currently 
I am machining a nozzle out of aluminum. Although I will not be using this 
particular nozzle for flight I figured I should practice making one out of some 
scrap metal that I found(in this case aluminium). I know that you guys make 
some of your nozzles out of graphite, but for now I am learning to machine 
metal nozzles just for educational purposes.

Thank you guys!







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