Opposed Piston Twin, D.Kelley

[Art K]

Achim,
Looks like it's all starting to come together and look like a real engine. Great progress so far. Just a word of warning, when you get it running don't wipe away the oil spatters with a rag while its running, winds up on the rag & stalls it right quick. I saw that once at Cabin Fever.
Art

[fumopuc]

Achim,
Looks like it's all starting to come together and look like a real engine. Great progress so far. Just a word of warning, when you get it running don't wipe away the oil spatters with a rag while its running, winds up on the rag & stalls it right quick. I saw that once at Cabin Fever.
Art

Hi Art, If it will run, than I would be happy to immolate my best and nicest rap for this way to stall it once.
Thanks for watching and the good advice.

[fumopuc]

There is not a lot to see, but is really work to get 3 bearing blocks each side in line.
For the moment everything is fine,  the dummy shafts can be turned by hand.

[Admiral_dk]

There is not a lot to see, but is really work to get 3 bearing blocks each side in line.

I got absolutely no argument against that statement - au contraire - nice work so far Achim.

I've been doing drawings for a 3+2 Axis CNC mill for the last several month .... and to me that seems like a long time with slow progress .... so I know the feeling.

[Art K]

I'm with Per on this one. I've been spending the last couple month's working on moving prints of an engine into CAD. And when I needed a break what did I do but pick another and start over.
Art

[fumopuc]

Per, Art thanks for watching.


Today the crank shaft bearing blocks together with the dummy shaft  are finished and everything has get a run in with the lathe.
The bore at the bearing block in the middle was increased from 8mm to 10mm, because this is the final diameter of the  middle crank shaft bearing.
A brass dummy is glued with Loctite 648 to the dummy shaft and machined on the lathe to final size.


<a href="https://www.youtube.com/watch?v=rqwfJ5aBFSE" target="_blank">http://www.youtube.com/watch?v=rqwfJ5aBFSE</a>


The rest of the day was used to make the flywheels.
They will be fixed with industrial clamping sets from SIT-LOCK, easy to prepare and with a very good function.

[cwelkie]

Coming along very nicely Achim!  I love all the visible moving bits.
Charlie

[fumopuc]

Hi Charlie, good to know that you are still watching the progress.


Outside we have 10 cm new snow and inside was the day of the con rods.
Started by a rest of a 8 mm 7075 plate which was offered at ebay.
I have made some more pictures, so it should be self explaining.

[fumopuc]

... and part two.

[Roger B]

So five piston opposed twin      Spares are always good to have 

[fumopuc]

So five piston opposed twin  Spares are always good to have 

Hi Roger,
#0 is my set up part for all machinig steps.
Unfortunately it is already obsolete, 0,2 mm under size in the width, due to the stupid guy at the band saw.
He was not able to cut at the right side beside the line.

[fumopuc]

My computer was fed with the outer shape and the pocket, so he was able to do the job alone. I made a simple stop at two sides on the mill table, for 5 times repeating the same thing.
For reference only, the big bolts are M6 and the bolt in the small eye is M4.

[fumopuc]

Hi everybody, I have tried to find the best way for piston making. Lost two pieces during machining trials but at the end there should be enough now to get the 4 good pieces for this engine.

[b.lindsey]

Nice progress on the opposed piston twin Achim. Good to see an update on this one.

Bill

[Roger B]

Looking good    Now we have a six piston opposed twin  How are the gudgeon pins retained on this engine?