Interesting engine
 

This looks interesting...

circlecycleice.com - Home

Comments?

This is a step-change increase in the term "interference engine".

Pretty cool.

I don't see that working- the pistons coming out of the cylinder and then staying perfectly co-axial until they mate again. The gear backlash and such would require cylinder walll clearance that could not be taken up with a piston ring, since you need a ring compressor to get a piston+rings into a cylinder. The large clearance then means low efficiency due to blowby. Then there is lots of wingage losses unless you have a big pump to evacuate the crankcase, in which case that pump creates parasitic losses.

Piston engines are not perfect but they sure are a great compromise in many ways. The OPOC engine seems like a better idea to me. Rotaries had advantages and disadvantages. Same for turbines.

Not only that, they have to stay lined up!

http://forums.pelicanparts.com/uploa...1328577437.jpg

I remember watching Gilligan's Island on TV Land in the evenings. That was back when I was in grade school. Good times. I always preferred Mary-Anne to Ginger. :)

Ginger had some game if you pulled her off the G.I set. Mary Anne otherwise.

http://forums.pelicanparts.com/uploa...1328578675.jpg

http://forums.pelicanparts.com/uploa...1328578725.jpg

http://forums.pelicanparts.com/uploa...1328578819.jpg

Did you bother to look at the videos?
They have a working propane powered engine running in one of them.

Your right, it is interesting. But the fact that they can make a propane model run does not mean its an efficient way of burning anything. It doesn't seem to pass the Occams sniff test.

I did. Button #5. Right after the video of the hand cranked version. I did not review the entire website so I do not understand why it is super efficient and I do not understand in every day terms what the application(s) are.

They say it is good for a diesel engine because of it's super long stroke.

Your thoughts?

uh oh - now we're into Slasher movies...

I still think it would have a lot of losses from blow by, and windage. It also has a lot of parts moving, maybe more than a piston engine of comparable power/efficiency. How are they initiating spark?

circlecycleice.com - Image Gallery

Oh my goodness, imagine any of that lot getting the slightest bit out of synchronicity: i hope the casing is strong enough to contain the flying components!!!

It IS interesting. It apparently works, though I'm skeptical of announcements like these that are long on marketing for public consumption. I have to wonder why they're promoting to the public instead of to some manufacturer. Some of the claims are a little sketchy too. I it really non-reciprocating? Both the pistons and the cylinders seem to be changing direction once every revolution.

I believe it is not technically reciprocating since they move in a circle rather than a straight line.

I expect the DOE will buy this. Wow, there are some really "interesting" engineers "out there".

I think OPOC, HCCI, Diesotto, etc. are better paths to take. If you want efficiency go high bypass gas turbine.