5 cylinder Radial Engine

[rdean]

Five cylinder head slugs cut to size and width.


Because of the equal distance Master Rod issue I had to cut some pockets in three of the heads to keep the compression ratio equal.


Rod guide, spark plug, pockets and head bolt locations done on CNC.


Head bolts and valve guides drilled out.


Valve guides next

Thanks for looking
Ray

 

[ad1964]

Are there any drawings available for this engine ?

 

[DavidR8]

Are there any drawings available for this engine ?

I found these with a Google search:

Oz : Edwards Radial 5 plan - free download

outerzone.co.uk

 

[rwm]

Superb. (I'm running out of adjectives.) Even looking at those plans this is daunting. I need a shop tour!

 

[rdean]

I decided that I should cut the cooling fins in the heads before I work on the valves.

This is the setup I used with my rotary table.


I used a 0.060 slitting saw at a depth of 0.150 and cranked slowly with a lot of WD 40.


Fresh off the mill.


Back to the mill to remove the fins for the intake and exhaust connections.


Still need to clean them up and de burr but here they are.


Thanks for looking
Ray

 

[Chris Hamel]

Looks good

 

[rwm]

Nice. All this with round column mill no less.

 

[rdean]

That's right Robert and I have only had to move the head once since I started this project.

I made up the valve guides and seats today but I forgot to take any pictures of the operation.
This is the result.


Thanks for looking
Ray

 

[rdean]

A huge step forward in the project as I have the cylinder heads completed. All the holes are drilled and tapped even the spark plug hole. The valve guides are installed and the counter hole has been drilled through the guides.

Drilling the intake and exhaust ports with a 0.100 offset.


After some cleaning up.


4 of the 5 heads have a different depth pocket so the ports are at a different height also.
This is head #1 with a 0.013 deep pocket.


All lined up.


Large deep pocket for the spark plug.


Just remembered the rocker arm supports will need at least one hole in each head but that will be later.

Thanks for looking
Ray

 

[Chris Hamel]

Looking good