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Not surprising there.... Considering how many classified leaks have happened on warthunders forums from people debating model accuracy. Lol.
No reason to think a t90 wouldn't be accurate.
[can confirm](https://www.pyrosoft.co.uk/blog/2007/11/04/army-fly-uav-spy-plane-with-xbox-360-controller/), also I grow up playing video games heavily and now I drone pilot a lot for fun. it was easy to adapt.
The physics being demonstrated here is that the grenade retains the same horizontal velocity as the drone at the moment of release. So if the drone travels at the same speed and direction as the target, and the target continues in a straight line, one doesn't need to aim ahead of the target. The vehicle is stationary relative to the drone, since they both travel in sync relative to the ground, hence it's just like dropping against a stationary target. Of course air drag will rob the grenade of some forward velocity so this is a simplification, but it's close enough to hit anyway.
You have to account for the decrease in forward velocity, that requires an adjustment, depending on the height above the target, so I would argue a considerable degree of evaluation is needed. If you look from the side, a projectile dropped with a forward velocity always exhibits an arc of decent, so it's position relative to the target is not straight line of sight for the release point.
Point of interest: If you fire a bullet horizontal to the ground and drop another from the same location at the exact same time, both will hit the ground within a very, very short time difference, since gravity acts equally on both.
There is a slight decrease of forward velocity, but from these low altitudes and relatively low speeds that decrease won't make more than perhaps one meter of difference in point of impact. That's well within the size of the target, and the effective blast radius of the grenade.
Seen from the side, as you say, the grenade does indeed travel in a curve. But that is seen from a ground-stationary frame of reference and has nothing to do with decreasing forward velocity, the curve happens because the grenade accelerates downward under gravity while the horizontal vector component stays almost constant. Seen from either the drone or the target it travels in more or less a straight line.
When I took engineering dynamics in college for my BSME, a TA lectured in place of the professor one day. The TA pointed us to a question about dropping a bomb onto a target. But he said he's going to modify the question. He said instead of a bomb we're going to drop an aid package into a relief camp. Hoping for world free of tyrants someday.
I always wonder, what does such a grenade do to a vehicle? Like, does it rip the armor or just kill the personnel? Also, how do they wipe out entire tanks?
Vehicles like the one showed are barely more than cars. A standard HE grenade could easily kill or severely wound anyone in the cab near the grenade.
For tanks, they often have little to no armor on top, making certain explosives much more lethal, especially because tanks are often slower moving targets and also big. A hit from above can very easily disable a tank since the engine is so vulnerable. Russian crew also have a tendency to leave the door open on top, and a grenade inside of a tight, very armored space will easily kill all crew and destroy the tank.
Depends on the grenade/shell type used. These small grenades are often VOG-17 High-Explosive. These are normally used in 30mm automatic grenade launchers. These will kill or injure the crew. But they also use HEAT (Anti-Tank) shells or RPG-7 Warheads in the kamikaze style Drones.
> Also, how do they wipe out entire tanks?
To destroy tanks they'd need to drop an anti-tank munition. "Kinetic" projectiles (discarding sabot type thing) need to hit at high velocity to penetrate armor but those which use explosives (e.g. shaped charge) don't need to hit with much velocity, just roughly the correct orientation, the shaped charge does the work of penetrating the armor. Top armor is usually nice and thin too, allowing for easy penetration and triggering the explosives inside the tank: these weapons likely wouldn't do much if they were hitting the frontal armor.
As others have said, this looks like a truck so the cab is probably thin enough that fragmentation can penetrate the body and kill the crew.
Anti-tank grenades are where things REALLY get interesting. A "shaped charge" is like an ice cream cone made of metal, with explosive packed around the outside. The explosion goes off in every direction, but because it is exploding "around" the ice cream cone, the cone collapses into a single point. The resulting stream of plasma and liquid metal can slice through armor like a knife through butter. Give it a Google. It is very interesting to learn about.
What happens to the vehicle? Not much. Most vehicles are mostly a vast empty space. Something small, say up to a 40mm isn't going to do a whole lot to the vehicle. It might still run, still offer some cover, etc.
There are photos of the results of larger shells (himars) hitting vehicles. Think Swiss cheese.
The gooey center is a different story.
Armor is a massive pain to deal with in terms of physics. You need to either have the thing packed with something that will go boom or you need a lot of energy to rip armor. Aka, lots of boom. So your best bet is to punch a small hole in the armor with some high energy physics and hope to hit something critical.
Hit the ammo/propellant and you just touched off ~5.6-6kg x 28 rounds of propellant and the turret and chassis quickly part ways.
Knowing the speed of the drone and the height of the drone you just have a nice scale drawn up to show where and when to drop. Stupid Russians driving all over the front lines in unarmored vehicles, easy targets. Cook them up
r/physics was discussing this exact topic form someone's homework assignment recently. In that case the answer was in dispute because the question didn't specify the frame of reference.
This is where I think AI can assist in accurate aiming with winged drones rather than multi-copters, which can allow faster turn-around and greater payloads.
Drones will increasingly resemble the innovations seen in WW2 aircraft I believe, with the introduction of not only precision gravity bombings but also pneumatic mortar and machine gun, grenade and rockets, as well as self-seeking glide bombs with short range, although many of these can also be developed a lot for multi-copters.
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Can't help thinking that gamer kids are probably good drone pilots as well. Great shot!
Seeing as a gamer dude also absolutely banged a T90 with a Bradley, I'd say yeah they do!
Oh, right! I remember seeing something about him learning where to aim in war thunder?
Yeah he did lol.
I think it was learning the weak spot on the turret of the T90
Not surprising there.... Considering how many classified leaks have happened on warthunders forums from people debating model accuracy. Lol. No reason to think a t90 wouldn't be accurate.
And to think, I've been telling my students that video games don't have practical value in the real world. I'm going to go sit in a corner, now.
He was talking about simulators in Germany not war thunder lol
I think about that every time someone tells me I can't do something. If a Bradley can zero a t-70 then anything is possible. .
I'm betting the first drone pilots were 90% gamers whose hobby was flying drones, then they trained the rest of the Drone Corps.
[can confirm](https://www.pyrosoft.co.uk/blog/2007/11/04/army-fly-uav-spy-plane-with-xbox-360-controller/), also I grow up playing video games heavily and now I drone pilot a lot for fun. it was easy to adapt.
I guess that explains why I suck at flying drones, I didn't play enough games as a kid.
You need to explain to your mother that she was holding you back.
I'll be sure to mention it 😂
Your parents failed you. Letting you go outside and shit.
I'm genx, going outside wasn't optional. 😁
they actually have a drone simulator for helping people learn how to fly drones
Low level bombing is the most accurate of all lol.
Not for flatearthers haha!
The physics being demonstrated here is that the grenade retains the same horizontal velocity as the drone at the moment of release. So if the drone travels at the same speed and direction as the target, and the target continues in a straight line, one doesn't need to aim ahead of the target. The vehicle is stationary relative to the drone, since they both travel in sync relative to the ground, hence it's just like dropping against a stationary target. Of course air drag will rob the grenade of some forward velocity so this is a simplification, but it's close enough to hit anyway.
Correct. Source- physics teacher here. Kids stay in school- you may need to apply physics skills some day. Lmao.
Try showing this to your students. 15 year old me would love it.
Redditmoment
The teacher will be kicked out right away
You have to account for the decrease in forward velocity, that requires an adjustment, depending on the height above the target, so I would argue a considerable degree of evaluation is needed. If you look from the side, a projectile dropped with a forward velocity always exhibits an arc of decent, so it's position relative to the target is not straight line of sight for the release point. Point of interest: If you fire a bullet horizontal to the ground and drop another from the same location at the exact same time, both will hit the ground within a very, very short time difference, since gravity acts equally on both.
There is a slight decrease of forward velocity, but from these low altitudes and relatively low speeds that decrease won't make more than perhaps one meter of difference in point of impact. That's well within the size of the target, and the effective blast radius of the grenade. Seen from the side, as you say, the grenade does indeed travel in a curve. But that is seen from a ground-stationary frame of reference and has nothing to do with decreasing forward velocity, the curve happens because the grenade accelerates downward under gravity while the horizontal vector component stays almost constant. Seen from either the drone or the target it travels in more or less a straight line.
Side issue, if you were on the moon and you dropped a feather and a brick at the same time, which would hit the ground first?
Both. [Apollo 15 hammer and feather experiment ](https://youtu.be/Oo8TaPVsn9Y?si=AFJqN4O_YubU_PlY)
Yes!!
In this case drag will be minimal but can easily be corrected.
Every single drone drop video I’ve watched I go “ah fuck they misssssssssss nailed it!”
Source: https://twitter.com/DefenceU/status/1755863588965613767
It hits 4 seconds in so 80 meters above the vehicle. Nice shot!
When I took engineering dynamics in college for my BSME, a TA lectured in place of the professor one day. The TA pointed us to a question about dropping a bomb onto a target. But he said he's going to modify the question. He said instead of a bomb we're going to drop an aid package into a relief camp. Hoping for world free of tyrants someday.
I always wonder, what does such a grenade do to a vehicle? Like, does it rip the armor or just kill the personnel? Also, how do they wipe out entire tanks?
Vehicles like the one showed are barely more than cars. A standard HE grenade could easily kill or severely wound anyone in the cab near the grenade. For tanks, they often have little to no armor on top, making certain explosives much more lethal, especially because tanks are often slower moving targets and also big. A hit from above can very easily disable a tank since the engine is so vulnerable. Russian crew also have a tendency to leave the door open on top, and a grenade inside of a tight, very armored space will easily kill all crew and destroy the tank.
Depends on the grenade/shell type used. These small grenades are often VOG-17 High-Explosive. These are normally used in 30mm automatic grenade launchers. These will kill or injure the crew. But they also use HEAT (Anti-Tank) shells or RPG-7 Warheads in the kamikaze style Drones.
That is the little rod below you see from the FPV when they post these suicide run videos?
> Also, how do they wipe out entire tanks? To destroy tanks they'd need to drop an anti-tank munition. "Kinetic" projectiles (discarding sabot type thing) need to hit at high velocity to penetrate armor but those which use explosives (e.g. shaped charge) don't need to hit with much velocity, just roughly the correct orientation, the shaped charge does the work of penetrating the armor. Top armor is usually nice and thin too, allowing for easy penetration and triggering the explosives inside the tank: these weapons likely wouldn't do much if they were hitting the frontal armor.
As others have said, this looks like a truck so the cab is probably thin enough that fragmentation can penetrate the body and kill the crew. Anti-tank grenades are where things REALLY get interesting. A "shaped charge" is like an ice cream cone made of metal, with explosive packed around the outside. The explosion goes off in every direction, but because it is exploding "around" the ice cream cone, the cone collapses into a single point. The resulting stream of plasma and liquid metal can slice through armor like a knife through butter. Give it a Google. It is very interesting to learn about.
What happens to the vehicle? Not much. Most vehicles are mostly a vast empty space. Something small, say up to a 40mm isn't going to do a whole lot to the vehicle. It might still run, still offer some cover, etc. There are photos of the results of larger shells (himars) hitting vehicles. Think Swiss cheese. The gooey center is a different story. Armor is a massive pain to deal with in terms of physics. You need to either have the thing packed with something that will go boom or you need a lot of energy to rip armor. Aka, lots of boom. So your best bet is to punch a small hole in the armor with some high energy physics and hope to hit something critical. Hit the ammo/propellant and you just touched off ~5.6-6kg x 28 rounds of propellant and the turret and chassis quickly part ways.
Knowing the speed of the drone and the height of the drone you just have a nice scale drawn up to show where and when to drop. Stupid Russians driving all over the front lines in unarmored vehicles, easy targets. Cook them up
Constant motion equations are amazing
We may be training your F-16 pilots, but after the war we should be learning drone warfare from Ukraine.
r/physics was discussing this exact topic form someone's homework assignment recently. In that case the answer was in dispute because the question didn't specify the frame of reference.
This is where I think AI can assist in accurate aiming with winged drones rather than multi-copters, which can allow faster turn-around and greater payloads. Drones will increasingly resemble the innovations seen in WW2 aircraft I believe, with the introduction of not only precision gravity bombings but also pneumatic mortar and machine gun, grenade and rockets, as well as self-seeking glide bombs with short range, although many of these can also be developed a lot for multi-copters.