This is a seriously ambitious jam entry. I started on Easy, took the first contract from Mission Control (the National Air Gallery's Static Display Airframe: wingspan under 60 m, under $16,000 per plane, three airframes in 12 days), and opened the hangar. Seeing the requirements checked live in green next to a real analysis panel (static margin, stall speed, wing area, max lift) made the plane editor feel like proper engineering rather than decoration. Jumping from that into a test flight on the runway with a full instrument cluster is a great payoff, and tying it all to a factory that mass-produces your blueprint is a really strong tycoon hook.