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"

Tag: Royal Geelong Show

Royal Geelong Show 2019

The “Show” was held over the last 4 days.  I will not bang on again about my republican leanings.  See posts from previous years if that persuasion is of any interest.  The weather was ordinary.  Quite a few showers and blustery wind.  But we were mostly warm in the Vintage Machinery shed where our Model Machinery cage is located.  Fairly good visitor numbers, but not much real interest in our model engine offerings.

I exhibited my beam engine and Trevithick dredger engines, both running on piped steam.  The vertical boiler and feed pump was on static display, of no interest to anyone.  My Stirling engine got the most attention from kids, who are attracted by the swirling spiral colours, and not much interest in the intriguing method of running.  I am convinced that models must be moving, colourful, and have some relation to what people and kids see on television if they are to have any traction with the public.

But, the model and full size engine exhibitors enjoyed the displays, and an occasional visitor engaged in conversation.  Here are some pics and videos of some of the shed displays.  There dog shows, bird breeding, monster trucks,  horse riding events, cattle and sheep judging, and side show rides but these were not recorded by me.   I did visit the Amateur Astronomy display, and will visit the workshop of one of the exhibitors soon.

50 yrs vintage machinery.JPG

Beam with lagging.JPG

I had applied wooden lagging to the beam engine cylinder

Package boiler and Trevor.JPG

Steam for the engines is provided from this Package Boiler at 25psi.   Enough to turn them over.  Capable of much higher pressures.

Package boiler diag

cage bench north

Cage Bench North includes the Trevithick dredger model, the beam engine and the Stirling engine.

Cage bench south

Cage Bench South.  Swen Pettig’s prize winning flame gulper, and 1″ Minnie under construction.

Stuart swen

Stuart and Swen ?discussing engine repairs.

P1033007.JPG

Model Engineering first prize!

triple.JPG

And the full size triple expansion engine.  The Vintage Machinery boiler is being upgraded, so there was insufficient steam to run the triple.

 

 

The Royal Geelong Show- Vintage Machinery Shed

A few pictures of the Vintage Machinery Shed, at The Royal Geelong Show.   Don’t get me going about the “Royal”. It is a ridiculous anachronism.  But since our head of state is still a Brit (the much admired Queen Elizabeth 2), I suppose we are stuck with the “Royal”.  The engines photographed below are just the ones in the immediate vicinity of the models cage.  I will add some more in a later post.

The boiler used to power the steam engines.

The boiler used to power the steam engines.  wood fired, running at about 35 psi.

The triple expansion marine engine. It powered a tug boat originally. It is steam powered, but only the high and intermediate pressure cylinders are currently powered. The condenser is not fitted to the engine because of the large volume of water it consumes, so the low pressure cylinder is not powered. The rotation of the engine is slightly irregular because only 2 of the cylinders are powered, but it is still a mightily impressive sight.

The triple expansion marine engine. It powered a tug boat originally. It is steam powered, but only the high and intermediate pressure cylinders are currently powered. The condenser is not fitted to the engine because of the large volume of water it consumes, so the low pressure cylinder is not powered. The rotation of the engine is slightly irregular because only 2 of the cylinders are powered, but it is still a mightily impressive sight.  When the engineers learned that I am making a triple expansion model engine, they generously spent considerable time and patience explaining the various components and mechanisms, and involved me with the start up process.  That process is quite complicated, because the engine cannot rotate until the 3 cylinders are heated, and introducing steam heats only the first (high pressure) cylinder.  Separate steam lines heat the other 2 cylinders, and they are closed just before rotation commences.

The crankshaft

The crankshaft, con rods, eccentrics

The low pressure cylinder Stephenson's link

The low pressure cylinder Stephenson’s link

The main steam valve (right), the reversing valve (left front), and the intermediate cylinder start up supply line lever.

The main steam valve (right), the Stephenson’s link reversing valve (left front), and the intermediate cylinder start up supply line lever.

another shot of the valve eccentrics

another shot of the valve eccentrics

This oscillating single cylinder, double acting steam engine with very nice architectural details dates from 1862. It is probably the oldest working engine at the show

This Wedlake and Dendy oscillating single cylinder, double acting steam engine with very nice architectural details dates from 1862. It is probably the oldest working engine at the show.  The governor is not original.

This one is dated 1865.

This Wedlake and Dendy  single cylinder horizontal is dated 1865.  Despite its age, it runs beautifully.