Firstly, we conducted the water hanging test. Hanging one bottle of water (348g), the Inspire 2 takes off easily and shows no shake during hovering and flying.
Challenge I-Water Hanging Test
Only one bottle? So easy!
Then we tried two bottles, three bottles…all the way to seven bottles (2.436kg, that’s all I have prepared), the Inspire 2 can still fly normally.
The we also tried hanging the bottles of water on the four spinning propellers. It turned out that only one bottle fell and the aircraft kept flying stably.
Challenge II—Instant Tensile Test
As the 7 bottles of water were not enough to measure the Inspire 2’s payload weight limit, so we decide to do the tensile test.
Pull a fixed point on the ground with the Inspire 2 and the maximum tensile force is 4.55kg.
After that, we directly used the Inspire 2 to pull a bag. Firstly we tried a 4kg bag, but the Inspire 2 failed to take off. Then we tried 3.5kg, the Inspire 2 can take off normally and support low-altitude flight, but not violent or accelerated controls.
Conclusion: the maximum instant tensile force of the Inspire 2 can reach 4.55kg and the uniaxial thrust of the propulsion system can reach 2kg.
Challenge III—Cut-down Propeller Test
We firstly cut down one side of the propellers to test whether the Inspire 2 can hover and fly normally with four broken propellers.
In actual test, the Inspire 2 can take off normally and complete the flying commands. Due to the broken propellers’ damaged dynamic balance, the landing gear shook dramatically. Meanwhile, with smaller blades, the propellers’ efficiency decreased while the motor speed and noise increased.
Then we cut down both sides of each propeller.
With both sides cut down, the propellers’ dynamic balance were not significantly influenced. But with smaller blades, the motor speed increased a lot when the Inspire 2 hovered. It turned out that the Inspire 2 can still take off normally, with less noise and stable landing gears.
Finally, based on the cut-down blades, further cut down the counterclockwise propellers.
With the counterclockwise propellers cut shorter than the Phantom 4’s 9-inch propeller, the aircraft’s counterclockwise anti-torque force was greater than the clockwise one. As a result, the aircraft spun counterclockwise to keep hovering.
The test has proved how powerful the Inspire 2’s flight controller can be. With damaged propeller dynamic balance, the aircraft can still fly normally with such shake. Well, this is just for extreme test. For normal drone piloting, you’d better check the propeller to avoid motor malfunctions or crashes.
Challenge IV—Broken Propeller Test
We cut the propellers of the Inspire 2.
Then we flied the Inspire 2 with broken propellers for about 10 minutes over the lawn.
It turned out that the Inspire 2 survived our violent maneuvering and finally landed safely.
Challenge V—Drone Interference Test
After the Inspire 2 hovered, we dragged it with different levels of force at different distance. But it can return to its original place after we released it, proving its excellent positioning ability with the GPS and visual sensing system.
The Inspire 2 has proved its powerful performance under those extreme tests. But we don’t recommend you to fly a drone with bugs or malfunctions. Having fun with your drone to create interesting photos or videos.