He's right about the design being not very practical, but there are a lot of real planes (old ones) which have totally unpractical designs when it comes to the cockpit. Some were even almost impossible to land with, because the cockpit was put too far on the back of the hull.Anyway, I really like the design. It's very believable. The one thing I would have as feedback is that although your idea of an super huge engine is very nice, I would love to see more of that in the design of the plane aside from the window. The propeller for example could even be bigger to show that there's a massive engine powering it. Just thinking out loud, it's a great design!