That’s great but a real-world off the shelf version from this company isn’t going to match anywhere near its performance in proper use is it?
For starters, it’s entire payload was taken up with the fuel required to flu for this time period. Also, it didn’t technically ‘fly’, it hovered. So negligible wind resistance and energy required to actually travel.....or do anything, other than hover and burn fuel.

Two stroke engines are much more polluting than 4 stroke. You can see it in the video,pumping out toxic clouds of pollution on startup. On top of that,any ICE engine produces CO2 constantly. Big thumbs down from me. I would like to see a test drone hovering for 10 hours powered by a H2 fuel cell power source,producing only water vapor exhaust.

I'm all for the use of drones for innumerable functions..but am I alone in fearing the damage that could be inflicted by these unguarded props on so many drones?
Surely it would not be either difficult or expensive to have a simple surround to protect anything and more importantly anybody from being sliced to pieces. And what about insurance? I must have compulsory insurance for my car but shouldn't there be similar provision for drones?

I think hovering is a fair test. But you are correct than in real-world use, the flight duration would be less. Payload, though, is not needed in every application, like video surveillance. So extra fuel capacity for those applications is a bonus. For applications where cargo is carried, obviously you would have less range.

Wait, weighs 29 lbs and payload is 22 lbs? Dry, with no gas?

In the said flight it carried 4.2 gallons of gas. Doesn’t that gas alone weigh 26-1/2 lbs?

Great progress! I can't wait to see what is next.

Four motors/props!? Where's the redundancy required for a truly commercial drone? Change it into a hexacopter with a hydrogen fuel cell and I might be convinced they have a worthwhile drone...

If endurance is what they’re after, why not just use a helicopter which is way more efficient than a multi rotor and you don’t need redundant power systems adding extra weight?

2 strokes burn a small amount of oil, they don't "pump out toxic pollution." No need for fear mongering. And give up on unrealistic expectations for "hydrogen fuel cells," they aren't magic.

michael_dowling - Actually, the "ICE" only produces CO2 when it is running while you and I produce it 'round the clock. I'm certainly thankful that my formal education was completed a few decades before the anthropogenic climate change indoctrination took a firm hold in academe; I was rather impressionable as a lad and might have ended up unhappily slogging through a shallow sea of self loathing. I don't care for two stroke engines either; they are extremely noisy and scare the wildlife but I can't argue with their power to weight ratio.