[SS2S-Main] Re: Material for Nozzle fabrication

  • From: "Hayk Azatyan" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "hayk_azatyan@xxxxxxxxx" for DMARC)
  • To: "sugarshot@xxxxxxxxxxxxx" <sugarshot@xxxxxxxxxxxxx>
  • Date: Tue, 6 May 2014 06:13:59 -0700 (PDT)

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.  
  
 
Cheers,
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> 
wrote:

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! 
>
>
>-Hayk Azatyan

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