Author Topic: Stuart No 1  (Read 16077 times)

Online Jo

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Re: Stuart No 1
« Reply #105 on: February 06, 2019, 08:19:28 AM »
Best get that new compressor on order

:thinking:

Might be worth thinking about I have run short of things to spend money on  :noidea: , including castings   :disappointed:

Jo
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Offline Gas_mantle

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Re: Stuart No 1
« Reply #106 on: February 06, 2019, 08:28:06 AM »
Best get that new compressor on order

:thinking:

Might be worth thinking about I have run short of things to spend money on  :noidea: , including castings   :disappointed:

Jo

Nah, get a boiler - much more fun  :)

Online Jo

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Re: Stuart No 1
« Reply #107 on: February 07, 2019, 01:25:15 PM »
Peter my hobby is machining model engines not running them, once they are made they are of little interest for me. I have 5" boilers available if I so desired but a compressor is sufficient to prove they turn over.


The steam chest has been taken to size. Around the valve gland and the inlet gland It was left rough to be filed later. I needed to turn up the gland to bore the hole it is going to fit in and I decided that I would clamp down the gland and drill it while it was all set up. The Valve gland was then bolted to the chest with some buttons and the profile around the gland filed by hand.


What shall I make next  :thinking: I wonder what Eric's been up to  :stickpoke:

Jo


« Last Edit: February 07, 2019, 01:28:46 PM by Jo »
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Online Jasonb

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Re: Stuart No 1
« Reply #108 on: February 07, 2019, 01:31:32 PM »
I  like the new lighting fixture in the last photo ;)

Online b.lindsey

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Re: Stuart No 1
« Reply #109 on: February 07, 2019, 02:09:09 PM »
That turned out very well Jo. Getting close now!!

Bill

Offline jeff l

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Re: Stuart No 1
« Reply #110 on: February 07, 2019, 03:40:10 PM »
looking very nice

Online Jo

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Re: Stuart No 1
« Reply #111 on: February 07, 2019, 04:16:48 PM »
Thanks Guys  :)

I  like the new lighting fixture in the last photo ;)

That light fixture is a designer piece, very expensive  :facepalm: , I believe a one off  ::)


I found a piece of cast Iron just about the right size for the piston which would allow for three rings as well, so it was a delicate task to square up the ends turn the length for the rings to fit the cylinder bore then cut off the rings while retaining as much of the inner spare cast Iron for other jobs  :ThumbsUp: The piston was only faced, drilled and threaded at this stage as I want to turn it once fitted on the piston rod.

It seems like weeks ago I turned the piston rod, if you recall I left the end over sized so now I need to turn it to length and thread it. The important factor here is to get the length right so that the piston leaves equal gap at the bottom and the top of the cylinder so it was necessary to measure the rod at the lowest and highest position, calculate the amount to come off, then mount the piston rod back between centres to turn it down.

We are all set up for tomorrow so now I can go and find out what someone has been up to, I don't believe that all he has done is find a new box for a set of castings   :noidea:

Jo

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Online b.lindsey

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Re: Stuart No 1
« Reply #112 on: February 07, 2019, 04:20:27 PM »
He looks rather forlorn there Jo. Most likely because that new box is empty!!

Bill

Online Jo

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Re: Stuart No 1
« Reply #113 on: February 07, 2019, 05:17:32 PM »
Careful Bill its a ploy to make you feel sorry for him  ::)

He read somewhere recently about some new castings in one of my threads so thought he might be in luck so has been preparing for them but as I have been explaining to him its all just words there is no photographic evidence of any castings and they should be using their own threads to show off their castings rather than trying to wind him up by putting them on my threads  :slap: 

Jo
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Online Jo

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Re: Stuart No 1
« Reply #114 on: February 07, 2019, 05:21:50 PM »
I have just spoken to Eric, we might get another set of pics today  :thinking:

Eric and I had been discussing the valve rod guide... It looks like it has to be modified from what is shown on to drawings to fit. I can see why they dropped it on the later casting sets.

Jo
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Online Jasonb

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Re: Stuart No 1
« Reply #115 on: February 07, 2019, 06:23:57 PM »
Are you going for a solid piston or is there enough metal there to split in two and hollow it out? Doubt balance will be an issue as its not going to be used much in anger but may make it easier to get the rings in place.

Pics will have to wait a week or so as it is just standard rate UPS box but I'm sure he will have an idea of whats coming form this logo. :) I don't think they come with a special coating though.


Online Jo

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Re: Stuart No 1
« Reply #116 on: February 07, 2019, 06:47:05 PM »
I have decided to go for the solid piston, the original two part hollowed out one was because their rings were prone to break  :facepalm: The amount of weight that can be removed is limited and probably only worth while if the intent was to run it faster than designed.

Jo
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Online b.lindsey

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Re: Stuart No 1
« Reply #117 on: February 07, 2019, 08:20:43 PM »
Hope you can make it work though even if modified. It is to me a very interesting feature and focal point.

Bill

Offline steamer

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Re: Stuart No 1
« Reply #118 on: February 07, 2019, 08:28:50 PM »
One wide  piston ring split with an overlap works great at 160 psig saturated steam..........


Just sayin
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline john mills

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Re: Stuart No 1
« Reply #119 on: February 07, 2019, 09:56:52 PM »
that make the valve guide foot a bit big or would be better if it was bigger to use the two cylinder cover holes
what has been done before ? the valve rod would not be guided much with out the guide.
the two cover studs could be repositioned to better suit the valve rod support casting .
« Last Edit: February 08, 2019, 07:06:54 AM by john mills »