Author Topic: Edwards 5 Cylinders.  (Read 8783 times)

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #90 on: April 26, 2019, 02:11:48 PM »
Quote
I putted a wrong number in tha cnc ;-)

Been there - done that ...!.... though not with a bolt circle .... more like a move that broke the tool  :cussing:
Ditto
But mine was the probe off the 3D taster got the wrong axis set on the pendant twirled the wheel ping

Shame about the bolt circle just smile and reprogram ,press start and all will be good
Yeah, another gift to the Aluminium god!!! ;-)

Im doing the other side and got a tooling/jig/vise problem for the top fins.

I'll just make a few with a 1/8 end mill for the prototype. I'll work on a little jig later.

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Offline petertha

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Re: Edwards 5 Cylinders.
« Reply #91 on: April 26, 2019, 05:11:32 PM »
I'm looking at the relief around the valve area (red arrow). Is that double facet clearance or is that the valve face itself? Maybe the actual valve seat contact is a much smaller band (green arrow)? I seem to recall the Edwards is a conical combustion chamber, not a hemi, is that right? Maybe that's why it looks more pronounced.

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #92 on: April 26, 2019, 07:19:04 PM »


I'm looking at the relief around the valve area (red arrow). Is that double facet clearance or is that the valve face itself? Maybe the actual valve seat contact is a much smaller band (green arrow)? I seem to recall the Edwards is a conical combustion chamber, not a hemi, is that right? Maybe that's why it looks more pronounced.

Yeah, 20deg conical. It look weird but we cant do otherwise.

Did all heads done now!!!

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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #93 on: April 29, 2019, 10:43:22 PM »
I did the valve retainer today. I changed the design to a simplier one, using the same c-clip than the rocker shaft. one.

Need some deburing tho ;-)



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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #94 on: April 30, 2019, 02:51:19 AM »
Those springs on the pic are not the good one.

I checked the spec of a 0.03 piano wire, 10 coils 3/8 ext. diam., 1"" fl. and it gave me something like 3pounds.

Someone measured it??

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« Last Edit: April 30, 2019, 12:34:58 PM by glorfindel »

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #95 on: May 02, 2019, 07:32:40 PM »
Here are my modifications.

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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #96 on: May 02, 2019, 07:38:42 PM »

Forgot this one ;-)

I had to do it by 0.5" of lenght.

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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #97 on: May 06, 2019, 08:29:16 PM »
I've had problems making the 4-40 screw, it was braking at the very last threading pass.

So, i took a 4-40 socket head screw and i simply made the 0.125" sphere in the socket!!

I converted one end of my push rod to a spherical end.



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« Last Edit: May 07, 2019, 01:19:38 AM by glorfindel »

Offline Kim

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Re: Edwards 5 Cylinders.
« Reply #98 on: May 07, 2019, 05:09:08 AM »
That's a pretty clever solution!
Kim

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #99 on: May 07, 2019, 12:33:51 PM »
Sorry about the finishing surface of my push rods. It suck. I'll do better for the next one.

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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #100 on: May 07, 2019, 12:37:11 PM »
That's a pretty clever solution!
Kim
I dunno how small you can go tho. I was not sure if i would be able to "remove" all the hexagonal socket, but with a .125" ball nose instead of the 0.080", it was ok.

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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #101 on: May 08, 2019, 09:00:32 PM »
Piston's pins and pin's end.

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Offline petertha

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Re: Edwards 5 Cylinders.
« Reply #102 on: May 09, 2019, 06:12:51 AM »
Is that your own mod? Maybe I missed, I didn't see wrist pin pads on the original drawing? What keeps them attached to the ends?
My radial is a bit different. Wrist pin ends are slightly drilled & the pads have a little corresponding boss that fits in there. I'm not sure if its supposed to be permanent or no though.

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #103 on: May 09, 2019, 11:11:58 AM »


Is that your own mod? Maybe I missed, I didn't see wrist pin pads on the original drawing? What keeps them attached to the ends?
My radial is a bit different. Wrist pin ends are slightly drilled & the pads have a little corresponding boss that fits in there. I'm not sure if its supposed to be permanent or no though.

Original design call for an O.S. engine pin with  "polymer" end.

The ends are a little bit bigger than the pin, so i hope it will do the job.



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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #104 on: May 09, 2019, 11:14:33 AM »
I did another dumb mistake yesterday. I was reaming the ends of my rods, then i took the 1/4 reamer instead of the 6mm (both were on the table) to do the end of my master rod...

Dumb me.

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