6 Cycle Internal Combustion Engine

[fahrwud]

This one always fascinated me - the 1895 Mery engine. 6-cycle.....I think.
FW

https://www.homemodelenginemachinist.com/threads/my-1895-mery-engine.17841/

 

[Rdean33422]

I cut out a connecting rod and added a brass bushing in the piston end.
This is the way I cut off the caps on the main and rod bearings after the bolt holes are drilled.


Everything even fit and in line.


Next I will take it all apart and do some filing, some polishing, and make some cross beam supports with rubber feet.

Thanks for looking
Ray

 

[Rdean33422]

All back together and shined up.


I received the helical gears and the driven gear is big that's because of the 3 to 1 gear ratio.
I will have to do some special machining to make them fit and still get the flywheel on the shaft.


Thanks for looking
Ray

 

[Rdean33422]

In order to get enough room for the driven cam gear and the flywheel to happily coexist on the crankshaft I milled a slot in the bearing support.


Here is a shot of the outrigger legs front and back with rubber feet attached.
I will be using a pair of flywheels I had made for a different engine but didn't use.
Note the stepped slot for the cam gear.


Thanks for looking
Ray

 

[Rdean33422]

Big day today first I cut out some cam bearing supports.


Drilling, tapping, filing, adjusting, and polishing to get this.


I have 1/8" clearance at the flywheel with the taper lock bushing flush with the end of the crankshaft.


If you remember I said earlier that I had made this crankshaft much too long but I could cut it off later if needed.
Now I am glad I did. (make it that long)

Thanks for looking
Ray

 

[Rdean33422]

I got some time and cutout the cam lobes.


The 3D model shows the long duration for the exhaust valve.


Thanks for looking
Ray

 

[Rdean33422]

I slipped the cam lobes on the cam shaft and continued on to the valves.
I made 4 valve guides all the same 2 for the exhaust and 2 for the intake.


From mystery steel I turned four valves and then threaded the end of the valves 6X32. (sorry on picture)


Turned and threaded 4 valve keepers and along with the springs installed all. I was very lucky as I have good compression in both combustion chambers.
Also added 2 brass exhaust pipes.


This is the intake side of the engine. I added 2 short tubes for the intake pipes to attach to.


Thanks for looking
Ray

 

[Rdean33422]

Parts for the rocker arms.


This is working out better than I had expected. I must be doing something right as it all fits.


While I was at it I adjusted the valve timing for both ends.


Thanks for looking
Ray

 

[pileskis]

I'm following along.
Looks like an interesting design.
I am working on a similar valve arrangement, but for a steam engine.
More specifically "air" engines. While our traditional steam engines will run on air we don't reap the benifits of actual steam expansion.
My thought is to use a similar cam drive arrangement with cams that will open quickly at TDC and stay open longer, shut off quickly at BDC.
I think this will give us the opportunity to have some real slow running engines.

Sid