large vacuum engine

[crueby]

Love the paint and stripes!


 

[Michael S.]

I also like these stripes, although it always requires a bit of patience. Painter's tape is available in narrow strips on Amazon. This makes it easier to tape off. First the black stripes and after drying (about a week) then the yellow stripes.
But it's worth it.

[Kim]

Wow! I'll say!  Well worth while for those strips!  That's an excellent paint job. And the sled looks great too. 

Kim

[Davyboy]

That's a real beauty!   


Davyboy

[Zephyrin]

 impressive engine, the building and the immaculate painting and lining, top notch work, it looks to be close to running test...

[Michael S.]

Thanks Kim, Davyboy and Zephyrin.

A few parts still need to be built.

Greetings Michael

[Admiral_dk]

Michael - That is a very handsome Engine   

Per

[Michael S.]

Now a connecting rod needs to be built.
I won't make them in one piece. Firstly because I don't have the material for it and secondly because the motor has so little power that it works in several parts.
First I have a piece of steel (I don't know exactly what type of steel I have, it comes from the scrap bin, but I think it's normal structural steel or as we say here "forest and meadow steel")
After two parts of the same size were re-soldered with soft solder, the hole in the middle was machined on the lathe. Then the holes and threads for two screws were made. An M 6 × 0.75 thread for the tange on one side and an M 4 thread for an oiler on the other side.
Now I could clamp around the part and create the radius.
That worked very well.

Michael

[Michael S.]

Now a bronze bearing.
In two parts.
To do this, I saw a piece of round bronze material off a bar and turned the end faces flat on the lathe.
On one side there is a short pin about 5 mm in diameter.
Then saw the part in the middle and smooth both halves on the milling machine.
Both parts are then soldered onto a piece of brass using soft solder. There is a hole for the pin in the Meesing piece. The diameter of the hole must be measured.
Now all work can be done on the lathe.
Finally made the two screws and an oiler.

Greetings Michael

[crueby]

Clever use of the pin to align in the mill vise as well as on the brass holder - I'll have to remember that trick!

[Michael S.]

Yes Chris, it is absolutely helpful for centering on the Meesing Block.
Under the milling machine, the two halves lie on parallel supports and not on the pins. Always make half larger than you really need.

[Michael S.]

I didn't actually get much done at the weekend, too much Christmas market and mulled wine. The weather looks much better from the warm workshop.
But the connecting rod is supposed to be made from this rusty rod. Unfortunately I didn't have any suitable material. First shaped on the lathe and then machined the small end on the milling machine. The large end is glued with Loctite.
The thing with the bolt at the small end didn't work as it was so short. Too little lateral play.
I then built the bolt as described in the blueprint. The connecting rod with piston still runs a little too sluggishly in the cylinder. I don't think easily enough. It would be ok for a steam engine. But for a vacuum engine it definitely has to be even easier. Many factors that can prevent the engine from running.
Well, let's see. Just carry on.

Greetings Michael

[Michael S.]

I had the idea of ​​using the lathe and a belt to make the motor a little more mobile. It worked well too. Is that enough?

Michael

<a href="https://www.youtube.com/watch?v=okaq9UB964o" target="_blank">http://www.youtube.com/watch?v=okaq9UB964o</a>

[crueby]

Great to see  parts in motion. You could change the caption on the video to claim the model is turning the lathe!

[Michael S.]

Only those who have drunk too much beer or wine believe that...