johnsmachines

machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment. I read every comment and respond to most. n.b. There is a list of my first 800 posts in my post of 17 June 2021, titled "800 Posts"
July 12, 2017

TRIPLE FINAL(?) ASSEMBLY

Just one photo to show that I have not totally ignored the triple expansion marine engine.   I have started to re-assemble it, having made almost all of the components.  But there were quite a few finishing tasks put aside until later, which I am now tackling.  eg lubrication points.  I suspect that this will not be the final teardown and assembly.

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The gunmetal base, with main bearings and crankshaft installed.  The eccentrics are not finally positioned.  

And some reminder photos from 2 years ago, of making the crankshaft.

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The centres were drilled on the CNC milling machine, after the locating the top of the bar

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Turning the second big end bearing.  Note the packing to support the crankshaft after the first big end had been turned.   The main bearings were turned last.

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The finished crankshaft.  Not much remains of the 51mm stainless rod.

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July 12, 2017

Model Ship’s Cannon

I spotted this model cannon at the Townsville Maritime Museum, Townsville, Queensland, Australia.  The barrel is cast and bored.  Nicely detailed, particularly the barrel decorations.  My understanding is that such exuberant decorations on the original cannons would have been very costly, and not used on naval ships.  But they were sometimes commissioned by pirates who were spending their ill gotten gains.

The staff very kindly allowed me to reposition it for the photographs, and I am very happy to give the museum a thumbs up for some most interesting displays.

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