A little Sleeve Valve Engine

Gallery, Projects and General > Project Logs

<< < (9/19) > >>

Gerhard Olivier:
You are a master Achim :bow: :bow:

Gerhard

crankshafter:
Achim.
Thank you for the pictures and your whrite-up, amazing proj :jaw:ect.
You are a master-wizzard :bow: :bow: :beer:

Crankshafter

dsquire:
Achim

It certainly is a pleasure to watch this engine come to life from pieces of raw metal. Your design, machining and photography skills are amazing and a real joy to watch. I look forward to watching the balance of the engine take shape. :ddb: :ddb: :ddb:

Cheers :beer:

Don

madjackghengis:
Hi Achim, There is nothing in the world quite like the feel of a well lapped sleeve inside the part it was lapped to fit, and if there are several parts, all lapped together, the feel of all of them, in concert, is like knowing how it will run and sound before you get there.
Your project is looking great, and the unique aspect of the sleeve valve design is not to be overlooked either, it is quite an achievement. Can't wait to hear it run, great progress, despite all the jigs, fixtures and tooling having to be made.
mad jack

Joachim Steinke:
Good morning,

slowly the rest of the cylinder parts are growing.

Beginning with the head I could finally use this little self made tap for the first time. I got the smallest Rimfire spark plug with a NS 10-40 thread and these special and unusual taps are hard to get in Germany. So I turned and milled one from ETG and then hardened, tempered and grinded it at last. It does the job very well.

The following components are the last one to make from spherical cast iron. First I made the piston ring blanks which are 1mm high and 0.75mm width.

After parting them off they where put aside and will be divided, expanded and finally tempered in the next days. And the remaining piece of the cast iron blank was used to manufacture the piston.

As the engine has ports like a 2-cycle motor I have to fix the piston rings, so they can not come in conflict with the windows. For the installation of the little fixing pins I had to mill 1mm holes near the ring shoulder.

The lapping of the piston and the final fitting to the sleeve was made directly on the material blank, so I did not need an extra fixture for this job. After that the piston could be parted off.

To prevent the piston pin from sliding sideways I cut a little v-grove at each inside of the bore. The 4mm pin will be held by small snap rings made from 0.5mm wire.

And at last most of the vitally components are ready now.

Now the whole apparatus becomes more and more affinity with a real motor.

I could say that the lapping and fitting work was a real success. All components are sliding easy and free, a longer lasting running test with more than 8tousand rpm on my high speed spindle was no problem at all.

Even without the piston rings assembled the engine has a strong compression, I’m not able to turn it over the TDC at compression cycle on the naked 6mm crankshaft. For easier testing and handling I made the little brass cylinder, the real flywheel has to be build in the next days.

Good night and a nice weekend from Achim

Navigation

 Message Index

Go to full version