When I was in school, it was said that the only stupid question was the one that you didn't ask, and I was always the one who asked the questions other children were embarrassed or afraid to ask. 

    This may have been asked here before.... If so please forgive my re-asking it.   What is the rationale behind having two unequal length hulls on an HP.   This is a signature feature of Rob's designs, as is the cabin in one hull, and the Aerorig, and the multiple rudders, all for obvious reasons.    The reason for the long slender hull under the mast(s) is not so obvious to me.

            I can close my eyes and conjure up an image of a "TikiProa", with one or two free standing masts in one hull of a wharram, and a cabin  on the opposite hull that extends out over the bridge deck, and the "Dennyrudders".     I know of no catamaran of any kind that has a single mast in one hull, nor have I heard anybody make a case for why it would not work.    I've toyed with the option of having a mast in only one hull on a catamaran, versus a biplane rig or central mast (all free standing).   

    At first glance the photo below looks like the mast is in the near hull (stbd) and unstayed..... it clearly is neither.   The sterns have less freeboard than the bows, but that's a trivial issue.  It isn't much of a stretch of the imagination to turn this into a "tiki proa".   

                                                                                                                                H.W.