Slow Motion Drone Versus Pork Video

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What is the best way to simulate the blades of a drone smashing full speed into your bare skin? These Danish researchers used a slab of pork to find out and, as a bonus, they filmed it in slow motion. Yay for science!
 
Not a drone.

And how is this going to be even remotely accurate? Last time I checked, these quad copter motors are not mounted on a stationary rail.
 
I got my thumb with my r/c prop once, son of a bee it hurt and bled quite a bit, but no permanent damage. People have definitely had to go to the hospital from the field I flew at, one dude got his wrist. o_O
 
That was the fixture pushing the motor that did that. A drone wouldn't have the inertia or the forward thrust to drive the blade that deep.
 
jpm100 said:
That was the fixture pushing the motor that did that. A drone wouldn't have the inertia or the forward thrust to drive the blade that deep.
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I completely agree. This experiment ignores inertia and the relationship of mass to inertia.

jpm100 and I found something we can agree on. It's just that it takes the laws of physics to prove it :(
 
Also, pork skin is quite thick, much thicker than human skin... unless it is a piglet.
 
I dunno if crashing just right you can hit ground such that it drives entire length of prop into dirt and then snaps off. Racing quads props arn't quite as long but they're stiffer, and 1 pound object at >80mph has some energy.
 
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The worst that could happen is a bit of pain, maybe some bleeding, but in reality most people may react to it a bit like this:

 
meh was already done on mythbusters and even they used drones to test it.
 
jpm100 said:
That was the fixture pushing the motor that did that. A drone wouldn't have the inertia or the forward thrust to drive the blade that deep.
Click to expand...

Why not? The forward motion of the blade on rails is the same as the forward motion of a drone flying at 10mph crashing into your arm while standing up right in a field. Seems like a perfectly good demonstration to me.
 
nysmo said:
Why not? The forward motion of the blade on rails is the same as the forward motion of a drone flying at 10mph crashing into your arm while standing up right in a field. Seems like a perfectly good demonstration to me.
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Sure it's perfectly good if you're hit by a drone train while tied to its tracks. The problem with this demonstration is that the subject is physically attached to the "drone" via the rail. So it's immovable. When in reality when a drone hits an object there is deflection. So instead of the blade cutting into skin, the drone is moved out of the way by the force of the engine.
 
They ought to redo this test with a 700 size helicopter spooled up to around 3000rpm. Leave the bones in as they won't matter. There was a kid who accidentally killed himself in New York a couple years ago with one when the Heli he was flying accidentally hit himself. It was reported that it cut his skull in half and part of his shoulder.
 
0k I want to see this with a racing drone because that would have made pork coleslaw. At the flying field from time to time people get pretty nasty cuts and loss of fingers from RC aircraft and as these drones get bigger and faster you will see nastier accidents.

pork coleslaw may be a bit of exageration but I can totally believe this video
 
I have a scar on my leg when mine went crazy and flew into it, was a decent cut by carbon fiber blades but no hospital needed. Yea this experiment only shows what happens when you shove a motor using a rail with a prop on it into the side of raw pig meat. What happens when it actually hits you is it changes its angle because you are more likely to get cut by the prop in motion than get stabbed and then the drone flips. The prop and motor on a racing sized drone wont hurt as much as the mass of the device itself flying into you at 70mph lol.

Also, who woulda thunk that a spinning flying machine could cause injury. Are we next going to cover putting your fingers into a metal warehouse fan?
 
jpm100 said:
That was the fixture pushing the motor that did that. A drone wouldn't have the inertia or the forward thrust to drive the blade that deep.
Click to expand...
Racing drones do upwards of 70mph. I guarantee you don't want to get hit with one.
csgill75 said:
They ought to redo this test with a 700 size helicopter spooled up to around 3000rpm. Leave the bones in as they won't matter. There was a kid who accidentally killed himself in New York a couple years ago with one when the Heli he was flying accidentally hit himself. It was reported that it cut his skull in half and part of his shoulder.
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That was a full on gas powered model helicopter with a much bigger blade. Not to say that drones aren't also dangerous.
 
DocSavage said:
Racing drones do upwards of 70mph. I guarantee you don't want to get hit with one.

That was a full on gas powered model helicopter with a much bigger blade. Not to say that drones aren't also dangerous.
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Dear complainers about a sled...We put cars on sleds all the time to test their impacts on very hard, very heavy stationary objects.

Think this is not an accurate test? What happens when your drone is flying out of control and plowing down from an high altitude. That energy is 1/2mV*V and may be worse than this sled. The real energy is not the mass imparted from the sled itself but the kinetic energy of the velocity which is a square of the function.
 
csgill75 said:
There was a kid who accidentally killed himself in New York a couple years ago with one when the Heli he was flying accidentally hit himself
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I remember that one, it was the R/C club president's son, very sad story.
 
M76 said:
Sure it's perfectly good if you're hit by a drone train while tied to its tracks. The problem with this demonstration is that the subject is physically attached to the "drone" via the rail. So it's immovable. When in reality when a drone hits an object there is deflection. So instead of the blade cutting into skin, the drone is moved out of the way by the force of the engine.
Click to expand...

Are you sure? So every drone has exactly the same mass and vector and bounces off everything? I would say this is a carefully controlled event in the vid to apply maximum force looking for a worst possible hit.
 
M76 said:
Sure it's perfectly good if you're hit by a drone train while tied to its tracks. The problem with this demonstration is that the subject is physically attached to the "drone" via the rail. So it's immovable. When in reality when a drone hits an object there is deflection. So instead of the blade cutting into skin, the drone is moved out of the way by the force of the engine.
Click to expand...

100% of the time? No. Again I've crash quad literally 100s of times. Most of the time prop is pushed to one side or the other, or just from angle it flexes and breaks... but every once-in-awhile it doesn't, and it gets driven into the ground.
 
bexxxxxx said:
100% of the time? No. Again I've crash quad literally 100s of times. Most of the time prop is pushed to one side or the other, or just from angle it flexes and breaks... but every once-in-awhile it doesn't, and it gets driven into the ground.
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Yeah but you're not seeing your crashes in timelapse, you really have no idea what it looks like up close. You just see your drone bounce off the ground or a tree limb from 50 yards away. It sounds like you are trying to say the prop is so strong that the entire drone is deflected from the blade striking a solid object.

If you want to run the test yourself, crash your drone into your body and tell us how it feels. Now tell us if you would like this to happen to you as an innocent bystander minding his own business. I think this video was designed to implicate the risks of jackasses flying drones all over the place with total disregard for public safety under the excuse "hey guys it's just a drone, jeez, it'll totally bounce off of you if it hits, quit complaining!"
 
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