Forgive me, but I worry slightly about the strength of the rockers. There's a fairly solid bit of metal above the pivot, but it does nothing. The load is all on the thin strip of aluminium under the rocker, and having some experience of aluminium I worry that this thin strip may stretch a little and possibly even break after a period of engine operation.

I am not worried at all. The springs are light and I will lube often. The spring pressure is some 5 Lbs or so. I also have the ability to make all I want.

I finally did it!!

I finally had some time to get the rocker arms done. I put a few together and tested the amount of actual rocking motion and of course, Not enough. I started the day re-cutting the slot by just a few thou. I might have gotten away with what I had but the pushrod length would have had to be exact so why fight it.




Then the counterbore was done. I had a club member regrind a #2 counter bore bit so the pilot was a few thou smaller than the tap drill instead of the clearance hole. I was able to then counter bore the bottom for a caphead screw.




Then all that was left was the tapping of the holes in the tail. Thru hole with 1/16 of material, what the heck. I used the "speed tap wrench" to get the job done.




After that I started to make the adjusting nuts but after 2 I didn't feel like doing them. I wanted to have some fun instead of the production line stuff that has been going on lately. I decided to make the air cleaner lid after looking at JPeter's V8. He has a cool air cleaner on his and I was thinking "I want one of those". So I spent the rest of the session watching the mill make me one.

Sorry about the crappy picture.

Not the word you want to use for a motor, but that's just friggin adorable- 

Dave

Not the word you want to use for a motor, but that's just friggin adorable- 

Dave

Your right. Just sounds wrong.

Today I decided to finish the air cleaner lower pan. I found a piece of scrap large enough and faced it and turned the OD.



The air hole and mounting hole were both drilled from the bottom side.




The ID of the mount was bored with the boring bar




Then by some miracle, the part was parted off.



Then the front was cut to shape and that is where the camera battery died.




It was finished off in the CNC mill. I think it is a close replica of a 14 inch Edelbrock. Only without the Edelbrock.

I've been following this with great interest and I'm amazed at the amount of patience you've got.
I'm in the middle of making an Edwards 5cyl radial engine and I've got a little impatient at the repetative bits, my sons just the same, it's got to appear in front of you after a few minutes :-)

Steve

I've been following this with great interest and I'm amazed at the amount of patience you've got.
I'm in the middle of making an Edwards 5cyl radial engine and I've got a little impatient at the repetative bits, my sons just the same, it's got to appear in front of you after a few minutes :-)

To make things worse, I'm building 2 with a spare head. Things that I would need 16 of, I am making 40 and in most cases 44-46 pieces. I think the worst is over now. I have all the parts for the heads done. Now I need to assemble all the rockers and recut the water jackets and the heads will be ready 100%. I even have the head gaskets done.

I would like to see the edwards. Any pics online anywhere?

Not of mine but there are a few on youtube and other photo sites, just search for Edwards Radial, it should come up with a few hits.
Plans are available on the yahoo groups Radial group. Very simple engine and nothing out of the ordinary.

Steve

I couldn't resist making a few parts so I started on the carb. It is a simple drum type carb with adjustable air bleed. If it works out OK, I will include it in the drawings.