Single Cylinder Opposed

[rdean]

Back in the lathe for some cooling fins and a good clean up.


I like shiny things don't you?


Thanks for looking
Ray

 

[wachuko]

That came out looking really nice

 

[Jake M]

I like shiny things don't you?
View attachment 499331

Thanks for looking
Ray

I know it's the picture. I know it's going to look proper when it's assembled. I'm gonna say it anyhow.

You just built the fanciest air cooled polished aluminum flashlight that I've ever seen.

Awesome work.

 

[rdean]

Thank you Jamie

Jake my wife says it looks like a rocket without the nose cone.
It is going to be the most unusual looking model I have built.

Ray

 

[rdean]

Back on the engine today after a project for the wife the last couple of days.

I thought it was time the engine stood up by itself so I cut out these feet.


All put together and 10" high but it will need to go higher.


Cast Iron liner is next.

Thanks for looking
Ray

 

[rdean]

Turned down a piece of cast iron to fit inside the cylinder and cut to length.


The liner is 5 inches long so started with small drill bits and kept working my way up until I could get a large enough hole for the big boring bar to get through.


This bar has a 3/4" shank and made good time out to the final size.


Now to cleanup mess.

Thanks for looking
Ray

 

[Flyinfool]

Is the middle of the bore going to be trilobular due to the jaw pressure squeezing it out of round?

I always have that issue with thin wall in a chuck.

 

[rdean]

I could happen with thin wall steel or aluminum but the liner is cast iron and has a 1/8" thick wall I don't think there will be a problem.
Thanks for asking

Ray

 

[Chris Hamel]

Looking good Ray!

 

[rdean]

Thanks Chris

I installed the liner and drilled and taped for the intake valve, the exhaust valve, and the spark plug.
I have given this a lot of thought as to just how I am going to support the upper piston through out it's up and down travel. It also has to be kept from tilting sideways and turning.
This is what I am going to try first and it may not work, or it may wear the sides of the slot or bind up. We will just have to see.

1/2" end mill centered on the cylinder bore with a depth of 1.25"


Well that slot worked out very nicely.
The lower part of the slot extends into the cast iron liner.


So here is the upper piston, connecting rod bolt, cross bar and brass side retaining stops.
I wanted the connecting rod to be adjustable in order to be able to adjust the piston and in turn the compression ratio.




It moves smoothly now but the true test will be when the outer connecting rods and the o-rings are installed.

Thanks for looking
Ray