4 ms·

> The 20 min flight time is a lie, Joshua Bardwell measured 10 minutes hovering. To be fair, hovering time is often lower than flight time for copters.

alkz 6y ago
in this case the drone is so fragile that the only way to get 10mins of flight from it without breaking it, is to hover
- ionwake 6y ago
  I dont know why this comment was downvoted I found it both funny and informative
  - sangnoir 6y ago
    It's obviously hyperbole - but the problem is that without the hyperbole, the comment communicates nothing substantive. How was it informative?
    - alkz 6y ago
      it informs you that you're going to crash it when you try to actually fly it, and it will break badly. fpv drone frames are usually made from thick carbon fiber, with replaceable arms, and are designed for durability and repairability and they still get wrecked in crashes. so even if i put it in a funny way, it's not as much an hyperbole as much as a fact: unless you're pretty much hovering, you're going to end up with a very expensive and unserviceable pile of broken electronics and plastic
harperlee 6y ago
So 10 minutes up, then 10 minutes falling?
- ben7799 6y ago
  Anything with rotors generates extra lift when moving vs hovering, so it requires less power to hold altitude when moving vs hovering. Imagine if you stopped the blades but the craft is still traveling forward... lift is being generated by the air flowing over one side of the rotor just liked a fixed wing aircraft. At the extremes some full size helicopters can't climb straight up, they have to have forward motion to generate enough lift to climb. This allows use of a smaller motor to bring operating cost down. In the case DJI drones the battery times are usually quoted with some amount of forward speed.. it generates a longer run time than a hover test.
  - benhurmarcel 6y ago
    There's also simply the effect of not staying in a downstream you created. A drone/helicopter accelerates air downward, and it's easier to accelerate still air than air that's already moving downward.

alkz 6y ago

in this case the drone is so fragile that the only way to get 10mins of flight from it without breaking it, is to hover

ionwake 6y ago
I dont know why this comment was downvoted I found it both funny and informative
- sangnoir 6y ago
  It's obviously hyperbole - but the problem is that without the hyperbole, the comment communicates nothing substantive. How was it informative?
  - alkz 6y ago
    it informs you that you're going to crash it when you try to actually fly it, and it will break badly. fpv drone frames are usually made from thick carbon fiber, with replaceable arms, and are designed for durability and repairability and they still get wrecked in crashes. so even if i put it in a funny way, it's not as much an hyperbole as much as a fact: unless you're pretty much hovering, you're going to end up with a very expensive and unserviceable pile of broken electronics and plastic

harperlee 6y ago

So 10 minutes up, then 10 minutes falling?

ben7799 6y ago
Anything with rotors generates extra lift when moving vs hovering, so it requires less power to hold altitude when moving vs hovering. Imagine if you stopped the blades but the craft is still traveling forward... lift is being generated by the air flowing over one side of the rotor just liked a fixed wing aircraft. At the extremes some full size helicopters can't climb straight up, they have to have forward motion to generate enough lift to climb. This allows use of a smaller motor to bring operating cost down. In the case DJI drones the battery times are usually quoted with some amount of forward speed.. it generates a longer run time than a hover test.
- benhurmarcel 6y ago
  There's also simply the effect of not staying in a downstream you created. A drone/helicopter accelerates air downward, and it's easier to accelerate still air than air that's already moving downward.