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A comment on MIT’s gas-powered drone is able to stay in the air for five days at a time. Parent comment

Re:MIT’s gas-powered drone is able to stay in the air for fi... by Nomentatus on Friday June 30, 2017 @05:30PM (#14673713)
What you saw was the engine-fuel burning on the ground; the hydrogen went straight up in flames and burnt no-one.
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