Atkinson engine

[gg89220]

hello
start of construction by the crankcase

 

[johnmcc69]

Looks like you're off to a great start! Nice looking parts!

John

 

[gg89220]

hello
the regulator, the connecting rods, the crankshaft

 

[dsage]

Which plans are you building from?

 

[gg89220]

hello
found on this forum

https://drive.google.com/drive/folders/13jC5HWuBakT9M-XBz8e1oYulAwKTAXRj

 

[dsage]

Should be interesting. It might actually work. I have a friend with one built from these plans that works. It looks like you are well on your way. I'll be watching with anticipation.

Thanks for posting.

 

[stragenmitsuko]

will be folowing along

 

[gg89220]

hello
connecting rods, flywheel, axles and bushings

 

[dsage]

Moving right along. Nice work. Also a pretty unique flywheel.
Thanks

 

[gg89220]

hello
intake, carburetor, exhaust and tank

 

[dsage]

This is getting interesting. Nice work.
Is that a common bolt you are using as a valve?? I see a philips head on it.

 

[gg89220]

hello
cylinder and pistons to finish

I see a philips head on it.

yes

 

[dsage]

Very nice.
Have you changed anything from the drawings?
I hope you can make a video. I'm anxious to see it run.
Very cool.
You work fast.
Thanks

 

[gg89220]

hello
painting and final assembly

Have you changed anything from the drawings?

no

 

[dsage]

AND........ (is a video forthcoming ?)

You did a nice job making it look antique with the color scheme etc.
Nice.
Thanks

 

[Steamchick]

An excellent job! - Well done Sir.
How about a few nice little brass oil-pots on the crank main bearings and other strategic locations? I always like to see lots... and especially when someone makes a central feed to the big-end of the crank, so you see a small diameter brass tube from the end of the crank-pin to a collector that is at shaft centre, with a separate oil pot and feed pipe to drip into the collector. Odd little details can personalise a model and entertain us lesser mortals.
But well done!
K2

 

[bluejets]

Looks like the flywheel has been cracked on the mounting at the grub screw....bit heavy handed tightening..??
Might have to make a steel ring for there to keep it together.
Photo 3 .....#14

Now the big question, does it run..?

 

[gg89220]

yes it is running, soon the video

 

[Steamchick]

gg: Maybe a single drop of Loctite screw-lock will ensure it doesn't move on the shaft anyway?
Personally, I would remove and silver solder the flywheel, IF it needs to be repaired. Then carefully ream the hole back to size. (The Cast Iron may shrink very slightly with heating, or it may not be significant to affect the sliding clearance onto the shaft? (N.B. Cast iron exhaust manifolds can shrink 1 to 3% in their lifetime - but after many heating cycles... - Maybe the carbon is burnt-out by heating? Can a material scientist explain please? A curious material! - I once bronze brazed the skirt on an engine cylinder with a short (1") crack in it. Afterwards the skirt was thou or 3 smaller than the rest of the bore. - The piston was a good fit in the top 3/4 (above the base flange of the cylinder), but tight for the last 1/2" or so, A judicious application of emery where the engineer's blue indicated made a good fit, but a house moved forced the sale before I got that bike built and running, so I don't know if the repair worked...).
K2

 

[gg89220]

hello
engine video