3 ms·

Rockets are _fast_. Wikipedia doesn’t list the flight speed of any of the compatible rockets, but it does list the “muzzle velocity”as 690m/s. My guess is they

Rockets are _fast_. Wikipedia doesn’t list the flight speed of any of the compatible rockets, but it does list the “muzzle velocity”as 690m/s. My guess is they go faster than that once the rocket motors fire up, but even if they just fly at 690m/s it’s far from “simple” to intercept them with an accuracy down around 1m. 690m/s doesn’t give you many milliseconds between “it’s too far away for my explosive to damage” and “it flew right past me and hit eimrine’s house already”. If your camera is running 25 frames a second it’ll have moved 26m between frames. My inexpensive thermal camera from Adafruit can only do 16 frames per second, so it’d be 43m between frames. And I only get 32x24 pixels with it, so it’s angular resolution isn’t going to make intercepting something moving that gas easy, even if it’s coming directly towards me. It’s _possible_ maybe, but I doubt you’d even get close using hobby grade drones and diy grade electronics.

superchroma 4y ago
Yeah, you're definitely starting to look at a more expensive solution.
lazbog 4y ago
Actually I have a clarification. There will be 2 drones. One is for intelligence, it will have a camera with 4K/30FPS at least (the bigger - the better). It will fly like 10-20 km away from the protected target in order to recognize the shells and the rockets. It just captures the video and sends information to some server being located near the protected target. This server processes the data from this drone, recognizes shell or rocket, calculates its trajectory and sends few simple "homemade" drones with 500g of explosion to the calculated trajectory of that shell/rocket. So it will not try to detonate 1 meter near the rocket, but just catch the rocket directly and detonate because of the contact with the shell. We can calculate the trajectory with some error of course thus there will be 5-10 such drones located in chess order to cover few meters in radius along the trajectory.

superchroma 4y ago

Yeah, you're definitely starting to look at a more expensive solution.

lazbog 4y ago

Actually I have a clarification. There will be 2 drones. One is for intelligence, it will have a camera with 4K/30FPS at least (the bigger - the better). It will fly like 10-20 km away from the protected target in order to recognize the shells and the rockets. It just captures the video and sends information to some server being located near the protected target. This server processes the data from this drone, recognizes shell or rocket, calculates its trajectory and sends few simple "homemade" drones with 500g of explosion to the calculated trajectory of that shell/rocket. So it will not try to detonate 1 meter near the rocket, but just catch the rocket directly and detonate because of the contact with the shell. We can calculate the trajectory with some error of course thus there will be 5-10 such drones located in chess order to cover few meters in radius along the trajectory.