steam engine with 40 mm bore

[Admiral_dk]

Great Paint job Michael and the rest looks fine too

When the piston rings are compressed in the bore, does the gap at the ends close up completely?

First thing I thought when Michael said small Motorcycle (and 40mm Bore) is a Yamaha FS50 (I know some other brands has the same bore too) and I can see that it is two-stroke rings (in the picture) -> so they DO have a gap when reaching much higher temperatures than in a Steam Engine (if not -> Destroyed Ring, Piston and Cylinder and maybe worse). I believe the 0.3mm is a cold gap - but it is sufficient 

Per       

[Michael S.]

Today, on Labor Day, of course, we worked.
I aligned and fixed the cylinder with stand on the base plate. For this I made a piece of PVC material so that it simulates the connecting rod and I could align it to the crank. That was an easy way and the best orientation. Align the valve body parallel to the flywheel and then transfer the 4 holes to the base. worked fine
The crosshead was also sculpted into its final form.
The whole machine is placed on a wooden panel made of old weathered wood. The wood was once used as a walkway for the chimney sweep on the roof.
I'll probably work a little slower on the machine now. There is still work to be done but now that the weather is getting warmer there are other priorities.

Greetings Michael

[Michael S.]

The stuffing box for the piston rod is made with a packing from still old remnants of this valve packing. I soak the threads in steam oil with graphite grease.

[crueby]

Excellent.   

[Kim]

Beautiful, Michael! 

I really like those pin strips of orange you have on the engine!

Did you 3d print that orange PVC support you made? That's a pretty good idea!
Kim

[Michael S.]

Hi Kim, no not printed. But it's an idea to print something out. But I don't have a 3D printer. The part is made of PVC round material. One 35mm diameter piece for the crosshead guide and one 15mm piece for the width of the big end of the connecting rod.

Michael

[Admiral_dk]

It is already a beauty now - lovely paintjob Michael

So 'just a number of small parts to do' - to make it a runner 

Per

[Michael S.]

I put the steam engine back on the workbench.
The connecting rod was manufactured. The bolts are made of silver steel and run in bronze bushings. I also made the bolts as slotted screws. As shown in the blueprint. But it looks a bit strange.
The screw in the cross head is protected by a small metal sheet to prevent uncontrolled loosening.
So everything turns well and next comes the eccentric ring.

I hope you have a few quiet last days this year.
Here, due to a lot of rain in the last few days, the water in the river has risen and we once again have a property on the water. Unfortunately no steamboat.

Michael

[crueby]

Engine parts are looking great. Hope the river goes back down without any damage!  Looking forward to more videos of the steamboats going past!

[Admiral_dk]

I've seen quite a number of pictures showing the flooding along the river Elbe and a few others + if I remember correctly - then the forecast is quite a lot more rain ....

I really hope that this isn't the case for you all in Germany.

Per

[Michael S.]

The water is no longer rising and the peak level of 2013 is still far from being reached.

Today the eccentric ring was made.
To do this, I marked a steel plate and roughly cut it out. With drill and flex.
Create the external shape with the file.
But it's not supposed to run steel on steel and so I remembered how it can be seen on the original steam engines. The interior surfaces were coated with bearing metal. But I soft-soldered a bronze ring.
Then brought to the correct size inside the lathe.
I actually wanted to finish the outer shape of the ring on the milling machine and rotary table, but I think I'll leave it like that. Everything doesn't have to be perfect.

Michael

[crueby]

Neat way to do the bearing on the eccentric!   

[Michael S.]

Now the slide valve with joint and rod have also been completed.
Unfortunately I had a deviation of around 1.8 mm in the vertical center line.
I compensated for this deviation from the center of the eccentric ring in the joint.
Now I could do the first test run with compressed air, but there are still 5 open holes on the cylinder and slide box. (3 condensate valves, an oiler on the cylinder cover and a connection valve for the oil pump.)
So I have to wait until next year.

I wish everyone a happy new year.

Michael   

[crueby]

Nicely done!  Gives you something to look forward to in the new year!

[Don1966]

Awesome…..


 
Don