> trade off is more drag.   > drag-inducing fuselages where's the data on this? the reason i ask is that catamarans have a faster hull speed than eqivalent length monohulls, with the trade-off being split internal volume. fluids being fluids, i'd expect some similar characteristics in the air which implies 2 x skinny fuselages could be made to have less overall drag with similar total length and internal volume than a single fuselage.
Australia