Opposed Piston Twin, D.Kelley

[Roger B]

Nicely done    I have usually used C45k for crank shafts which is available as flat material. Im awaiting the video of all the bits going in and out together 

[Dave Otto]

Hi Achim

I have been following along with your build but haven't commented on it; everything is looking great!
Thanks for taking the time to post your crankshaft construction methods. I remember hogging a chunk of 1144sp round bar down when I made the crank for the Pacific; lots of chips.

I have wondered about how well this engine would run with what seem to be quite small flywheels? I searched around and found a YouTube video of one running pretty well.

Keep on with the very nice work,
Dave

[Art K]

Achim,
Those look like a lot of work, and chips to make. Looks great.
Art

[fumopuc]

Carl, Roger, Dave and Art, thanks for watching and the always friendly words.


Since this afternoon, we do have two crank shafts.
#2 is already assembled for a bearing clearance check.
Everything seams to work until this point.
<a href="https://www.youtube.com/watch?v=-gmsNKEwl6k" target="_blank">http://www.youtube.com/watch?v=-gmsNKEwl6k</a>
Next to do, is to remove the spacers and to fit it with the con rods and pistons.
Hopefully everything will be still movable after that.

[sco]

Great Work Achim - really like that gear train.

Simon.

[Kim]

Very nice Achim, as always!
The gear train runs very smooth!
Kim

[Art K]

Achim,
I think there's an echo in the room, everything looks great. The geartrian meshes well,everything fits well, looks great.
Art

[crueby]

Very nicely done!
 

[fumopuc]

Simon, Kim, Art and Chris, thank you very watch for watching. Good to know that you are still with me.


Today I have removed the spacers in crank shaft #2 and done a final machining at crank shaft #1.
Some spots for grub screws were missing useful for a eventually needed water pump pulley.
The crank shafts have got some black colour also and the final assembly of the crank drive was done.
A bit tricky, the adjustment of the piston ring gap, I have done it the classic way with a file and a fine stone for deburring.

[fumopuc]

After the successful assembly of the crank drive, nothing was really tight, so I come up with my temporary drag test bench on the lathe again.
First step was driven only one side and later both sides together.
[youtube1]https://youtu.be/LWmgHUfWabk[/youtube1]

[Roger B]

Looks good, everything in sequence   

[fumopuc]

Looks good, everything in sequence 

Hi Roger, not really. The proper synchronisation of the two  crankshafts was still missing.
I have done it this morning. I do love all these bank holidays in May.
Both crankshaft are blocked with some small wooden chunks.
The whole think to the mill and drilling and reaming two holes for some pins.
Now I hope that I can say crank drive done, timing gear train next. 

[yogi]

Great progress Achim! Coming along nicely! 
 

[fumopuc]

Hi Yogi, thanks and good to know you are still following.


I have had a bit remaining bank holiday and started with the camshaft bearing blocks.

[fumopuc]

Hi everybody, some more motion is visible.
Second cam shaft not complete finished yet.
[youtube1]https://youtu.be/upwtdKws1ps[/youtube1]
Below some pictures of making it.