A four-wheeled drone’s first aerial package delivery test showed off a special touch by also driving up to the doorstep of its pretend customer. That capability to deliver by both air and land makes the Panther drone an unusual competitor in the crowded drone delivery space. But the drone’s limited delivery range may pose a challenge in competing against the delivery drones of Google and Amazon.

“The Panther can fly at over 70 mph and has a flight time with a five-pound package of well over six minutes,” says Don Shaw, CEO of Advanced Tactics Inc. “With a two-pound package and larger battery it can fly well over nine minutes.

But air and ground versatility may have come at the cost of delivery range. That is because the ground mobility drivetrain adds extra weight that the Panther drone must expend battery power on lifting whenever it flies through the air. A future version of the Panther drone with a robotic arm to handle packages could potentially be heavier and shorten the delivery range even more. (On the other hand, Shaw pointed out that the drone can drive for hours on the ground at up to five miles per hour.)

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