Testing Concept Aircraft Within X-Plane 10

Once the computational fluid dynamics software had provided a prediction at which airspeeds the aircraft would stall with respect to the angle of attack, the model of concept aircraft 1 was then flight-tested within X-Plane 10.

The flight simulation software was opened and the respective aircraft was uploaded with a minimal payload, which keeps the results constant with those of the CFD testing (whereby only the wing was acted upon by gravity). The aircraft was then taken up to an altitude of around 3000 feet, providing sufficient clearance for the recovery from the stall. At an airspeed of around 150 knots, the throttle was closed and the trim function was used to hold the aircraft at a selected angle of attack. Once the stall warner activated, the attitude was held for a few seconds to continue the deepening of the stall and then the aircraft was recovered by pitching the nose down.

	Minimal Load (5.5 Tonne)		Double Load (11 Tonne)
θ	Indicated Airspeed	Relative Airspeed	Indicated Airspeed	Relative Airspeed
10o	69 kts	67.95 kts	98 kts	96.51 kts
15o	66 kts	63.75 kts	96 kts	92.73 kts
20o	64 kts	60.14 kts	91 kts	85.51 kts
25o	63 kts	57.10 kts	90 kts	81.57 kts
30o	61 kts	52.83 kts	80 kts	69.28 kts