Stuff that is like Holy Crap!

**deputyfestus** · 05-07-15, 06:10 PM

Like this, could this possibly be real ?

**rush2049** · 05-07-15, 06:32 PM

The speed at which that is moving is faster than the speed of sound. (based on my extensive rocketry experience)

It would break apart due to shock waves, especially seeing the construction of it at the end.
Something would need fiberglass reinforced with epoxy to withstand that kind of shockwave, not to mention how fast the propellers would have to be spinning.

One of the youtube comments suggests the video is sped up, that is maybe true. Or it is some fancy video editing.

**deputyfestus** · 05-07-15, 06:35 PM

If it is real there's some defense firms that should hire this guy.

**moving-target** · 05-07-15, 06:42 PM

think we used to have a guy really into drones in BC2 was it option or maybe it was noobie

**Warprosper** · 05-07-15, 06:43 PM

I have a drone that's almost that fast. I could definitely see this being possible.

**deputyfestus** · 05-07-15, 06:56 PM

Found this earlier version.

And then there's this...no engine.

**Guyver** · 05-07-15, 07:07 PM

**Amador +JP2+** · 05-07-15, 10:04 PM

Originally Posted by rush2049

The speed at which that is moving is faster than the speed of sound.

How do you know that? I heard no sonic boom? I see no measurements/calibration that could tell you this. I'm curious. How do you come to this conclusion?

**rush2049** · 05-08-15, 07:13 PM

It is hard to tell the speed of an object on film. I based my guess on the ascension rate of the drone on the cloud cover and the drones ability to go past them.

Here is a rocket that goes mach 2+ https://www.youtube.com/watch?v=EqNSwOw1myw
If you ignore the engine sound (high drone noise). The crackles are the boom echoing off the trees and landscape.
The drone in the video goes this fast, unless I am judging the height of the clouds incorrectly, which I admit is hard to tell on video. And perhaps I am completely wrong and the drone only seems so fast due to the video.

The drone is going so fast that if it isn't breaking mach by the dones speed alone, then the blades must be, which is prohibitive to continued flight.

I won't get into the physics of helicopters/drones, but the efficiency of a propellor spinning near mach goes to 0. (one of the reasons propellor driven planes have never broken mach 1)

**deputyfestus** · 05-08-15, 07:18 PM

The drone is going so fast that if it isn't breaking mach by the dones speed alone, then the blades must be, which is prohibitive to continued flight.

I won't get into the physics of helicopters/drones, but the efficiency of a propellor spinning near mach goes to 0. (one of the reasons propellor driven planes have never broken mach 1)

You are correct sir which is precisely the reason I posted this. Hence why jets?