another Snow engine

[fumopuc]

35°C outside in the shadow, 33°C in my shop this afternoon.
Plan was to feed the CNC milling machine and no further action or motion of myself.
From some remaining parts and fixtures I have made a new fixture for the drilling operation of the cylinder head.
The CNC mill was clocked to the centre of the fixture and the cylinder heads could be fixed easily one after the other.
Later in the afternoon I have made the 30 M2 threads with sweat running over my face.
Finally some more parts are nearly made. The bronze bush, which is guiding the piston rod, is still missing, but this will be done later.
The last picture shows all available cylinder parts assembled on my temporary dummy sub base. 


 

[Roger B]

Coming along well      36°C outside, mid 20s in the cellar so that's where I spent my day 

[Admiral_dk]

Nice progress again - looking good 

[fumopuc]

Thanks Admiral for the kind comment.


Hi everybody,after some weekends being outside, today some further progress in the shop.
I have made the cylinder head covers and the gaskets.
So the water jackets in the cylinder-heads are closed now.
As always,a fixture has to be made to get the parts clamped  at the CNC mill.
Gaskets has been made with the plotter as always.
Next to do the cylinder connector.

[Don1966]

Achim you been sneaking in some extra post while I wasn't looking. The cylinders and covers are starting to look great. I like.................... 

 

Don

[Dave Otto]

Very nice Achim!

The cylinder assemblies are coming along nicely.

Thanks for the update,
Daev

[Roger B]

That's some good progress    Are you using your CNC for drilling the fixing holes?

[fumopuc]

That's some good progress    Are you using your CNC for drilling the fixing holes?

If I have made a CAM program, yes.

[fumopuc]

Don, Dave thanks for stopping by and the friendly words.
In the meantime I have got it managed to make the cylinder connector.
In my opinion it must be done very accurate, because it is a "kind of heart" of this engine. If here is any kind of not parallel or not in line than it will be a problem for the entire engine.
So I have tried to do it with all my skills and very accurate. Starting from some bar stock of good aluminium.
First the long bore in the middle and than one face side.
After making an arbor it was turned around and checked for concentric run-out.
One picture showing the result of to optimistic machining behaviour during arbor making.
The final machining of the outer shape done in a final step.
Step two will following shortly......

[fumopuc]

...step two of the cylinder connector.
A quick and dirty fixture was made to keep all in position at CNC mill.
First side drilled, turned around and other side drilled.
A first sample assembling was successful so far, easy no piston and piston rods in.
Next to do, was to machine the windows for the later piston rod connection assembly.
Finally the latest assembly of the cylinder unit and time to open a bottle of good and cold Bavarian beer.
 

[Kim]

Very nice work Achim!
Sorry about the saw blade there... I'll bet that was startling 

Kim

[fumopuc]

I'll bet that was startling 

Kim

Hi Kim, I would say the problem was clearly  located betwen the handle of the mill and the floor of the Workshop. Or with other words, it is no good idea to try to cut with a 0,5 mm saw blade with the same parameters like a 1 mm blade. But now I hope I got it.

[Roger B]

Coming along nicely    I have a slitting saw that looks like your one     

[fumopuc]

Coming along nicely    I have a slitting saw that looks like your one     

Thanks Roger, I have two already now. Time to make a parting off tool for small circlips of these broken saw blades.

[b.lindsey]

Nice progress Achim. I am still following along even if quietly.

Bill