Edwards Radial5 converted to metric

[Michael Rosenbauer]

Introducion:
I found the Plan for the Edwards Radial 5 at "CRABCAD" the plan was "provided" as open cource by Robert Sigler.
My decision was to convert the drawings to metric dimensions draw them with DesignCAD and machine it.
Some drawings are modified, because I feel not convenient with Mr. Siglers solutions.
When I draw the plan I was easy convicted to modify my small mill Optimum BF20 to a CNC version.
Some of the parts are not realy able to realise with a conventional mill for example the cam disc.

I started with the cam housing, and then with the crank housing.

 

[josodl1953]

Looks nice! I made my Edwards camring without the help of CNC and it was a hell of a job.
Are you making two engines?

Jos

 

[Michael Rosenbauer]

Hello Jos,
thanks ! Yes I make two . One to sell cheap, just for the material´s at the next project.
I sell the better one ;-).
Can you explain how you machine a cam?
Did you build it imperial ?
Where did you buy the gears?
I would appreciate if you can help with an adress

 

[josodl1953]

Hallo Michael,
I made a dividing disc with 360 holes and used it to mill each cam lobe according the lift chart that is supplied with the Edwards drawings. It is fully explained in the thread about my Edwards radial 5 build. Because it wat the most difficult part, it was the first part I made. If this didn't work, there was no point in proceeding with other parts. Because of this, you will find the post on this subject in the beginning of the thread.

About gears: the Mädler company in your home country offers a vast range of metric size gears so I think you don't have to use imperial sizes.

Grüsse aus Holland,
Jos

 

[Michael Rosenbauer]

Hello Jos,
yes I could find anything needed by Mädler.
I watched your tread yesterday and I am very impressed of your craftsmanship.

 

[Michael Rosenbauer]

I make some progress
10 Zylinder completed. 27.00mm bore and beginning with the Cylinder heads.
I made 2 tools. One for the Cylinder finalisation on the laith.
the second tool is for fixatation of the cylinderhead. You can find it in the vice
I started today with the cylinderheads. I hope I finish them end of next week.
The CNC was also incharged but it was a little fail, I converted the bearing bore up to 14,25 but the bearings I will use have a 14mm outer diameter.
So I know now the CNC can make it

 

[Michael Rosenbauer]

Just want to know the dimentions

 

[josodl1953]

Hi Michael,
Are you using the original size 4-40 cylinder bolts or M3?

Jos

 

[Michael Rosenbauer]

Sorry Jos for the late answer,
I converted the plan to metric and using metric sizes. So I am using M3

 

[necchiom]

Impressive. Can U share the metric drawings?

 

[Michael Rosenbauer]

I can, but in what kind of file type
I made (draw) them with DesignCAD

 

[necchiom]

I can, but in what kind of file type
I made (draw) them with DesignCAD

PDF or DXF woud be great!

 

[Michael Rosenbauer]

Sorry necchiom
I am ill at the time.
I will investigate if my program convert them in a god manner.

 

[minh-thanh]

Hi Michael !
free plans or sell ?

 

[Michael Rosenbauer]

For free!
Robert Sigler set it for free, so do I.

 

[necchiom]

Thanks Michael!

 

[petertha]

I converted the plan to metric and using metric sizes. So I am using M3

Hi Michael, just curious. Did you redesign the cam ring & planetary gear assembly dimensions around metric gears or did you stay with original imperial gears?

 

[Michael Rosenbauer]

Hey Peter nice to hear from you.
First I wanted to stay with the imperial gears, but it is so easy to get the same gear reduction (number of teeth) at the German supplier and I didnt get the imperial easy in germany.
The out side teeth gear wheels I made myself. The inside is about 40€ each. Thats Ok.
The distances are within a few tenth.
So it is easy to align.

 

[petertha]

Ah, that makes sense. So I assume you selected module-1, crankshaft = 18 tooth, idler-1 = 18 tooth, idler-2 = 12 tooth, ring = 48 tooth?
Look forward to your building pics!

 

[Michael Rosenbauer]

You are right!
Pictures comming soon!