Thanks guys.
orthogonal1, What I had in mind was Spyderco Schempp Barong, Khukuri and some of the cold steel folders. Also the benchmade rokus.
The Schempp Barong is simply too small and light. Sal indicated that his folders were simply design exercises of applying big knife design to a smaller folder. I like these designs, BTW, since they are different.
I have a Rukus and it is too small for all but light-duty chopping, delimbing smaller sticks and some small splitting. The blade shape isn't particularly good for such tasks, either, at least not for chopping moves. A bit of recurve would help. The Rukus is actually pretty light in weight, considering its size.
The new Cold Steel big toys, notably the Rajah, seem like they may be able to do medium chopping at best. But, I'd like to see a cross-bolt in the blade/handle in addition to the lock. The above mentioned RAO has a cross-bolt and even Busse mentions one in his folder patent.
I think the RAO us too small for chopping, too, BTW. That, and the pivot looks to be too close to the blade's/handle's metal edge.
If you plan on doing regular chopping and such, I'd recommend just getting an old British Khukri (or however they are spelling it at the moment). They can be had for $20-$35 dollars and they perform the task pretty well. I like the two I have.
I do recall seeing folding machetes and such, but I don't recall ever having read a review of one.
I'm kind of amazed no one has marketed a folding knife for this niche. Probably costs too much and would be pretty heavy in relation to an equivalent fixed blade. I can envision a few ways of doing it, though.