Bruce Macbeth Engine, European Version

[fumopuc]

When the glue was cured a sample assembly.
And some ideas to improve it.

[Chipmaster]

Splendid 

Andy

[fumopuc]

Hi Andy, thanks.


The reality is now closer to the CAD model again.
And the rack for the water reservoir is started, also.

[Don1966]

Love it Achim a work of art...... 

 
Don

[Craig DeShong]

Hi Achim

I haven't stopped by this thread for a while, it somehow fell off my "radar", and it appears I've missed plenty.  Some really fabulous work here.  I'm a real fan. 

Craig

[Roger B]

That's some good progress on the ancillaries        I hope that the step ladder has been safety checked 

[fumopuc]

Hi Don, Craig and Roger, thanks for watching and the friendly comments.


Time has going on and my very last working day in the company is now a week ago.
So I am also a new member of the club of old age pensioner, these people which I know only saying " Sorry no time" so far.
Will see how I will develop in my case.


Here and now, I will continue to report about the small things been done so far without showing it here.


The water tank has getting more shape.
First time I have tried this blue tape and super glue.


 
 

[MJM460]

Hi Achem,

Congratulations on your retirement.  I am sure you will find your time fully occupied, and with luck, even include some time for engine making.

Good to see the last details taking shape on your beautiful engine.

MJM460

[Kim]

Congratulations on your retirement, Achim!
Hope you enjoy your well earned rest and relaxation!

Kim

[fumopuc]

MJM460, Kim thank you very much. I will try to learn to be retired as soon as possible.


Next steps with the water reservoir.
A hole to get the water out, a nozzle will follow here later.
The self made design with the later hidden socket screws was really tight.


Here is also my very new toy in action, a 3D Finder, in a (nearly) hobby pricing range.
This is a marvelous tool. It comes with some macros, already finished to implement into my CNC software (Eding CNC).
In this case the rectangle function was chosen. The program will touch all 4  edges and guide the spindle into the calculated center of the part.
This position will be recognized now automatically as the center of the work piece for the following operation.
So the cam program can also be set into the center of the part what could have big advantages in some cases.
If somebody has interest, do not hesitate to ask. A video of the first attempt is available.


Finally the reservoir in situ.

[gbritnell]

A very nice setup for the tanks and cooling.

[fumopuc]

Hi George, thanks for popping in and the friendly comment.
Shortly I have had another idea for the attachments, I will show it later.


Cooling circle next step, the inlet pipe to the pump.
Three attempts until I have got a, for me,  acceptable result.

[gary.a.ayres]

Some real quality on view here!

[Dave Otto]

Hi Achim

Glad to see you working on your engine, and congratulations on your retirement! Hopefully lots of quality shop time in your future.

The engine is looking great!
Dave

[fumopuc]

Hi Gary, Dave, thanks for watching, good to know that you are all there.


As already mentioned before, some weeks ago in the late evening I have had a look to the engine and the idea was born, there should be some barrels/drums standing around.
So the first action was, looking at ebay for RC drums scale 1:10. Lots of them could be found there and I recognized very quickly they are all 3D printed.
That reminds me that there is a 3D printer under my the bench too.
Searching at grabcad and thingiverse showing a lot of available cad models/stl files already.
I have been attracted by these combination of 4 barrels very much, because they looked like drums which has been really in use so far.
Coming as a stl file it was no problem to scale them in Fusion360 and export it as new stl file for the printer.
By luck it was possible to position them diagonal on my bed plate.
But unfortunately immediately after starting the print I recognized there is something wrong.
The first layer refused to get in proper contact with the bed plate.
Each barrel has had a nice outer circle but the surface of the whole bottom of the barrels was a mess only.
Some days earlier at that week I have printed something without any problem, so I have been nearly sure it could not be a problem of the 3D printer.
After an examination of the contact surface of the object to the bed plate in Cura, I have found the situation as shown at the second picture.
Here is exactly visible, what the printer did. The only really contact of the model to the bed plate is given by the light red outer circle of the drums only, the surface in middle has no contact.
So another learning session was necessary, how to convert a mesh into a solid body. Some youtube tutorials has been very helpful there.
The result is shown at the next picture. There we have the original small stl mesh, overlapped by the scaled solid model.
Now I have modified the bottom side of each barrel by adding another 0,3 mm plain material and joined it the the body.
Now the printing was possible without any further problems.
It was also a little adventure to split the model of 4 barrels into 4 single bodies, but at the end successfully also.