At last!, my login is approved and I can add my 2p.. .. .There is a much more fundamental problem than those mentioned earlier. . .. .Trim.. .. .For the A/C to be in trim, the C of G must co-incide with the C of L. Normally, the C of L will be somewhere over the wing and in this design the wing is apparently well aft of the C of G.. .. .I see three possibilities:. .. .1) the tail plane provides a great deal of aerodynamic downforce to move the C of L forward and restore trim.. .. .2) the tail is made of some very heavy material to move the C of G aft and restore trim.. .. .3) The entire cabin section is lighter-than-air, being made of the rare element unobtanium. This solution allows very economocal operating costs at the penalty of high initial cost, unobtanium being both expensive to procure and costly to work due to it's tendency to float away in the breeze.. .. .For solution 1) the A/C will suffer high induced drag and be
very uneconomical to fly.. .. .For solutions 2) and 3) the C of G will be so far aft that the A/C will, at best, sit extremely nose high on the water (vertically I suspect). Note also that the main wheels are located at about the natural point for the the C of L, and it is therefore also likely that this solution (heavy tail) will be in danger of lifting the nose wheel when operating on land. This solution (even if it were feasible) will of course also make the A/C uneconomical to operate due to the excess weight carried for trimming.. .. .All solutions will render the A/C very payload sensitive, since all of the payload will be placed forward of the C of L, unless you postulate that. like unobtanium, cartoon characters and cartoon cargo also have zero or negative weight. <img border="0" title="" alt="[Wink]" src="wink.gif" />