Aerogrp
Aerogrp
Aerogrp

Close, but not quite. Drag is proportional to V^2 as you state, but power is proportional to V^3 (power=D*V). To double your speed takes eight times the horsepower to overcome the aero drag. Rolling resistance, however, is pretty much proportional to speed. You can follow the math at: http://phors.locost7.info/phors06.

I see another problem with this configuration: certification of the seats. During my research on aircraft seat cushion foams for aging aircraft, I was told of the testing procedures used to certify seats. It involves bolting sets of seats to steel plates and dropping them from certain heights and at certain forward

Reflex is not necessary if you reduce your static margin by moving the center of gravity closer to the center of pressure. You will need a longitudinal stability augmentation system to keep it flying straight though (which would be trivial given that it is already FBW). We built and flew large R/C models to prove this

It says the weight right on the wheel: 5950 grams.