keesje -- your concept is the same size as a 320-200, but with a whopping 30% increase in cabin width.
A few questions:
1. What powerplants are those that produce similar power to CFM56 for 28% less fuel burn? How much do they weigh? Prop diameter?
2. What are the weight, drag, and fuel penalties of the increase in fuselage diameter over A320?
3. How did you lose 4.6 tonnes OEW?
4. How do pax use their laptop? Stand on their briefcase/laptop bag?
5. Is spiderman going to blow the cockpit door open with an airbag charge?