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Re:New Electric Drone Has Groundbreaking Flight Time by duchenne on Monday September 17, 2018 @12:14AM (#18003161)
The subtitle of the article is:

> The US-1, from Impossible Aerospace, can fly for 2 hours

If the drones goes at full speed, it loses more energy due to increased fiction with air and between mechanical parts. So, it reaches neither maximum flight time nor maximum flight range. The optimal speed to reach 75km is probably smaller.

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