Assuming the flight curve as a parabola, neglecting the air drag, an additional clearance height of 10cm/ 3.94" and a takeoff angle inbetween 30° and 40°, the horizontal speed vx should be approximately 4.8 m/s = 17.3 km/h = 10.7 mi/h, the vertical speed vy = 3.3 m/s = 11.9 km/h = 7.4 mi/h and v0 = 5.8 m/s = 20.9 km/h = 13.0 mi/h to clear the gap.
--> let´s gooo!!!