Bar/Chain combination to cut lake ice?

[mustxcape]

What would be an appropriate bar/chain combination to use to cut lake ice for ice fishing?
I have benn unable to find any the posts on this topic.
I would think the chain would be similar to that used by ice carvers, but do not know how this compares to standard chain.
I would also think the bar length would be important, but have no idea what would be the optimum length.
Has anyone had experience with this?
I have seen specialized sled mounted equipment for this application, but not a hand held saw, although I've heard they are used for ice diving hole cuts.
Wisconsin allows a 12" maximum hole size (diameter or square) for ice fishing so I am not sure that a chainsaw would be practical (or would it?).
Wisconsin does allow a maximum 48 square foot hole for sturgeon spearing so I would think it would be great for that.
Any other special considerations?

[MCS]

We used to have a regular visitor from WI who did a lot of ice cutting but I haven't seen any posting lately from him. I'd think the cutters would have a more square grinding and the rakers set lower too. Not sure about chain lubrication. I don't think you'd want any bar oil in the water.

[OBR]

From what I remember him saying, don't use bar oil, the water is the lubrication and the rakers are set super low... I think.

[mustxcape]

After asking around, the general consensus seems to be use just about any worn chain, use any cheap vegetable oil instead of bar oil (although the water is considered lubricant enough for limited use). and take a stance to avoid the back spray. However, I will always defer to an experienced user.

[MCS]

One other thing, use a hard nose bar and leave the chain a tad loose compared to wood cutting - about 1/8" between the bar and chain on the bottom.