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Old 03-21-2012, 01:24 AM   #1
David Morrow
 
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Default Moriya Stirling Fan - Double size

The short version of a long story is that after having built one Moriya ( a variant, really ), I wanted to repeat the experience without building the same thing. So double size it is. I'll post the pic's here and a brief description. For a bit more detail, you can have a look at the build page here :
http://www.ldrider.ca/cnc/moriya-dou...a-double-1.htm

The material for this thing, at least the material for the base and the displacer cylinder are awfully big for my little Sherline CNC mill and Myford S7 lathe.

I cut the 1" thick slab of aluminum down to size first on the band saw.





Next, I printed and glued the cad drawing to the work piece. For more complex jobs this really helps ensure everything gets done and in the right order.




The bulk of the displacer hole gets cut out with a hole saw. This takes all of 2-3 minutes on the drill press and means much easy job for the light mill.




Being so thick, I don't like to commit to milling down 1 inch as part of a single operation. So, I break it up into smaller jobs of about .250" - .350" at a time.






I got a bit ahead of myself in the beginning. A sneak preview... but it's a secret so do tell and don't ask.





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Old 03-25-2012, 04:34 AM   #2
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Default Re: Moriya Stirling Fan - Double size

Base is cut out and partially drilled. First sub-assembly mounted.



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Old 03-25-2012, 01:36 PM   #3
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Default Re: Moriya Stirling Fan - Double size

Looks good David.
Moriya is one of my favorite engines.
Gail in NM

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Old 03-29-2012, 02:24 AM   #4
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Default Re: Moriya Stirling Fan - Double size

A bit of progress over the past couple of days.

One big lump of aluminum reduced to a smaller lump of aluminum.






That was exhausting...

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Old 04-02-2012, 06:57 AM   #5
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Default Re: Moriya Stirling Fan - Double size

For a variety of reasons, I made the cold end cap square but I don't know if I like it yet. I can rework it so that it's round but I'll wait until the rest of the fan is mostly finished to see how it all fits in esthetically.




Power cylinder is now started. It'll be about 2" O.D. x 4" long



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Old 04-02-2012, 11:53 AM   #6
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Default Re: Moriya Stirling Fan - Double size

That looks great David!

Will be an excellent Stirling fan once completed!!
Nice and big and purposeful!!!

Andrew

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Old 04-02-2012, 04:21 PM   #7
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Default Re: Moriya Stirling Fan - Double size


Very nice work!

I have the Moriya book too. One day...

Thanks for the inspiration.
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Old 04-05-2012, 06:00 AM   #8
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Default Re: Moriya Stirling Fan - Double size

Due to the large diameter of the brass needed to properly scale up the power cylinder, I minimized it and made a retainer to secure it to the base instead.






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Old 04-07-2012, 05:10 AM   #9
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Default Re: Moriya Stirling Fan - Double size

I decided that the square cap on the cold end just didn't quite work esthetically so I turned it down on the lathe.

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Old 04-09-2012, 06:39 AM   #10
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Default Re: Moriya Stirling Fan - Double size

Crank brackets cut but with a bit of finishing work remaining. My eyes continue to have difficulty trying to get a handle on the relative proportion of some of the parts but I have no doubt that they are correct.




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