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Post by pitciblackscotland on May 10, 2013 0:20:55 GMT -5
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Post by racket on May 10, 2013 1:18:58 GMT -5
Hi Mark
LOL......I'm just getting itchy from all the sawdust ;-)
But I can see the end in sight now, will glue on the 6 brace pieces in the morning when theres less chance of me stuffing things up , when dried , I'll add some fillet to get a nice corner .
Once everything is finished I'll unscrew the steel boss off the back and replace it with a wooden one for casting , I needed the steel for secure clamping in the chuck when turning up the main wall to shape . .................the boss is only for machining the diffuser , once the castings are machined, it'll be removed.
Cheers
John
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Post by stoffe64 on May 14, 2013 6:06:44 GMT -5
im amazed as allways John,it looks good,i can imagine all the sawdust....im caughing already with my asthma here....hahaha
cheers/stephan
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Post by racket on May 24, 2013 21:29:27 GMT -5
Hi Guys Finally got the diffuser pattern finished, just waiting for the paint to fully dry before sending off to the foundry    Cheers John |
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Post by ernie wrenn on May 25, 2013 8:24:27 GMT -5
John..
That is amazing!! I have never seen a rough casting form made this way.
Ernie
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Post by racket on May 25, 2013 16:54:42 GMT -5
Hi Ernie
LOL......thats DIY for you :-)
It'll be interesting to see how the actual castings turn out, the foundry we use is really interested in what we do with our homemade jet engines so they put in a bit of extra effort to help us out .
Cheers
John
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Post by racket on Aug 6, 2013 4:06:48 GMT -5
Hi Guys
A couple of nice castings arrived in the mail today , all heat treated and ready to be machined ..............thanks Andrew :-).
Will post some pics in the next few days
Cheers
John
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Post by Johansson on Aug 6, 2013 11:03:59 GMT -5
Great news John, that was quick!
Perhaps I should consider talking to the local foundry for some casting jobs in the future, it sure gives a nice look to the parts instead of the raw surface left by a manual mill.
Cheers!
/Anders
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Post by pitciblackscotland on Aug 6, 2013 22:20:52 GMT -5
Hi John, Excellent now you will be busy working in the shed once again -  )). my thinking was that you machine up the parts first and then get them heat treated?  ?. Cheers, Mark.. |
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Post by racket on Aug 6, 2013 22:40:29 GMT -5
Hi Mark
Theres not a lot to be machined off so the parts should stay "true" , having the heat treatment first will have relieved the casting stresses and have the material ready for machining in its specified material specs .
The front cover casting is reasonably lightweight, though the diffuser "bulkhead" casting is relatively heavy , but theres a fair bit of material to be machined out at the bore and the bulkhead is where all the mounting is off, so it needs to be strong to stay true . .
Cheers
John
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Post by Johansson on Aug 7, 2013 16:08:47 GMT -5
Pics pics pics!  |
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Post by racket on Aug 8, 2013 2:42:14 GMT -5
Hi Guys A few pics of the front cover casting , weight ~3 kgs - 7 lbs    Cheers John |
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Post by pitciblackscotland on Aug 8, 2013 4:06:49 GMT -5
Hi John, Ah yes i see what you mean about the front cover nice - ) Cheers, Mark.. |
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Post by racket on Aug 8, 2013 4:14:20 GMT -5
And a few pics of the diffuser , weight ~6 kgs -14 lbs.     Cheers John |
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Post by Johansson on Aug 8, 2013 4:29:07 GMT -5
Very nice castings!
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)). my thinking was that you machine up the parts first and then get them heat treated?
?.