Author Topic: large vacuum engine  (Read 1658 times)

Offline crueby

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Re: large vacuum engine
« Reply #15 on: November 09, 2023, 05:36:44 PM »
Excellent progress!   :popcorn: :popcorn:

Offline Admiral_dk

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Re: large vacuum engine
« Reply #16 on: November 09, 2023, 09:58:50 PM »
The parts looks great  :ThumbsUp:

Per       :cheers:

Online Michael S.

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Re: large vacuum engine
« Reply #17 on: November 11, 2023, 06:00:16 PM »
The piston is ready.
It is made of cast iron and has an aluminum nose. The nose displaces dead space in the cylinder head.
The piston slides well through the cylinder.
I don't want to use a gasket between the cylinder and the cylinder head. The cylinder bushing protrudes by approximately 0.2 mm and the cylinder head is ground to the narrow edge. I think that's enough to keep it sealed.

Michael

<a href="https://www.youtube.com/watch?v=ON6rIHQR68Q" target="_blank">http://www.youtube.com/watch?v=ON6rIHQR68Q</a>

Offline crueby

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Re: large vacuum engine
« Reply #18 on: November 11, 2023, 06:04:36 PM »
Excellent fit of the piston!   :ThumbsUp:
 :popcorn:

Online Michael S.

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Re: large vacuum engine
« Reply #19 on: November 11, 2023, 06:46:53 PM »
Thanks Chris

 :cheers:

Offline Davyboy

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Re: large vacuum engine
« Reply #20 on: November 12, 2023, 02:03:36 PM »
Very nice work.  I'm getting excited to see it run.

Online Michael S.

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Re: large vacuum engine
« Reply #21 on: November 19, 2023, 06:43:36 PM »
We have taken a small step further.
A few straight surfaces are needed on the cylinder jacket. The slide rods are attached there. I had the idea of ​​gluing three small brass pieces onto a self-made face plate, an old pipe flange, with Loctite. Then turn the radius of the copper pipe.
The pieces are then milled to size on the outside.
The parts were then positioned and glued onto the copper pipe.
Finally secured with screws and sealed immediately so that the cooling water does not leak.
I think I can now paint the cylinder.

Greetings Michael

Offline crueby

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Re: large vacuum engine
« Reply #22 on: November 19, 2023, 06:51:56 PM »
Interesting idea to use Loctite to hold those parts on the faceplate for turning on the lathe! 


Great progress!   :popcorn: :popcorn:

Offline Kim

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Re: large vacuum engine
« Reply #23 on: November 19, 2023, 07:33:27 PM »
Great photos showing your order of operation there, Michael!  Very interesting trick  :ThumbsUp: :popcorn: :popcorn:

Kim

Offline Admiral_dk

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Re: large vacuum engine
« Reply #24 on: November 19, 2023, 09:58:44 PM »
Nifty trick Michael + a great result too  :ThumbsUp:

Per         :cheers:

Online Michael S.

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Re: large vacuum engine
« Reply #25 on: November 20, 2023, 12:07:28 PM »
Thanks guys,


At first I wasn't entirely sure whether the Loctite glue would hold it. That's why I used a low speed on the lathe and didn't stand directly next to the faceplate. So that the brass pieces don't fly around my ears.
It was astonishing how much heat you had to use to remove the pieces with the gas burner.

Michael

Online Michael S.

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Re: large vacuum engine
« Reply #26 on: November 20, 2023, 03:08:57 PM »
Now there is still some work to be done on the cylinder head. A part made of cast iron is screwed onto the bottom of the flame hole. The slider slides on it.
The exhaust valve is at the top. I didn't like it if the poppet valve just sits on the aluminum.
I inserted a bronze ring in place.
Above this is the valve housing made of brass. The poppet valve with spring is located inside the housing. But I still have to make it. The housing is made of several brass parts soldered with silver. The oval flange is later for the exhaust.

At the weekend my two nieces came to visit me in the workshop.
They found my profections boring and were only interested in chocolate surprise eggs.
This would clarify the question:
What happens to tools and models later?

Greetings Michael

Offline Kim

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Re: large vacuum engine
« Reply #27 on: November 20, 2023, 10:19:38 PM »
That's some great fabrication work there, Michael!  That part is really nice looking!  :popcorn: :popcorn:

And the picture of your nieces is great!  It's fun to have young ones come and visit, even if they aren't as into machining and engines as you!  :Lol:

Kim

Offline redhouseluv

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Re: large vacuum engine
« Reply #28 on: November 20, 2023, 10:25:00 PM »
I've just started following this build, it looks fantastic and I am fascinated by how you are fabricating it! Will be following......

Online Michael S.

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Re: large vacuum engine
« Reply #29 on: November 25, 2023, 06:18:04 PM »
I made the connecting piece on the piston for the connecting rod.
A bolt that does not rotate in the small end of the connecting rod has the bronze bushings on the left and right. The bolt is later fixed in the connecting rod with a grub screw.

Because the paint has dried on the castings and cylinders. And once the decorative lines were added, I really wanted to put everything together for a family photo.
Now I can build the connecting rod.

Greetings Michael

 

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