Imagegear - there was a variation on that cartoon on one of the first pages of my college textbook on aircraft design (the class was taught by the guy who literally wrote the book).
The part of that always stuck in my mind was the weights group - the aircraft skin was "unobtainium, one mil thick"
(the mention of 'unobtainium' when watching Avatar always brings that back
).
This one has always been one of my favorites (a copy graced my desk at work for many years):
It also comes frighteningly close to some of the Laplace Transformations I had to show back in my college controls class...
