In my original post(s) in the other thread, I mentioned how manipulating the BB height on a bike can effect stability and has the side effect of altering what is otherwise described here as the COG and/or COM. The "heated" part came about as recumbent balance considerations were interjected as an argument in a discussion about upright tandem (or bikes in general) design. That aside, IMHO I still believe that since captains are usually the largest single mass of the riders on a tandem, taking the opportunity to sit lower and apply a lower (BB) pressure point while cornering, is preferable to needlessly raising the same.
Some online resource bits discussing the topic in general...
http://www.calfeedesign.com/tech-pap...bike-handling/
http://www.cxmagazine.com/bottom-bra...ike-geometries
Then, much like any forum (COBS?) there are always opposites out there such as this:
http://davesbikeblog.squarespace.com...et-height.html
Cheers.