The museum roof rises 14 m over 356 m, so the car leaves it at only about 2.3°. The far bank is 1,758 m away and about 35 m lower. Set a speed and launch to see what happens.
Model. 1,450 kg car, drag coefficient 0.27 and frontal area 2.1 m². Drag rises about 2.2–2.6 times near and above the speed of sound. The car is assumed to stay nose-first and never tumble. The physics runs in 2 ms steps.
Ground and river. The ground heights come from Open-Elevation, sampled every 100 m along the roof's direction. The river position comes from OpenStreetMap. The trees and houses on the way are illustrative, at 10–15 m tall.
Drawing. Heights are stretched to make the arc visible. The exact stretch factor appears in the bottom-right corner, and the car is drawn much larger than scale.