Im not worried about 1 kg wayne but i sure would be worried about 5 kgs. The 1 kg was just an example for your physics lesson. Crew weight and boat weight are completely different.
You guys really seem to struggle with the concept of weight. And thats what will weigh the class down if you dont address it.
I would draw your attention to the f16s big brother as Macca already has. I guarantee nearly every competitive f18 will be within 5kgs of minimum weight. The Capricorns are generally lighter and carry corrector weights.
Are you suggesting that the massive worldwide f18 fleet is not living in the real world?