4 ms·

Also (along the lines of air dynamics) I am wondering about whether an airplane has a force in the direction it is traveling in and if that force does push anyt

by gist 8y ago

Also (along the lines of air dynamics) I am wondering about whether an airplane has a force in the direction it is traveling in and if that force does push anything small out of the way. As a small example if I have a pot in my hand and I move it in the direction of a tissue the tissue will move. So we have a very large airplane wing moving in the direction of a much smaller drone and the test does not simulate that at all.

deleted 8y ago
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dreamcompiler 8y ago
Two things: 1. Airplane wings are designed not to "push" forward on the air in front of them. That's drag and airplanes are designed to minimize it. 2. What little air is pushed forward is only going to be affected by the oncoming wing a few inches in front of the wing, and at 230 mph closing speed that doesn't provide nearly enough time for the force of the oncoming air to move the drone out of the way.
- gist 8y ago
  Thanks. But one question. What is the chance that a drone in the path of an airplane will not be impacted by the force of some other object on, or design of, the plane that is not the wing? For example the engine or the landing gear (small plane) or the fuselage? So we hover a drone in front of a small plane and will the small plane hit the drone? And if a larger jet will the drone remain in place or move out of the way by some force (not the wing). And remenber that the drone has to exactly strike in a particular way. As an example (of 'in a particular way') think of a nail on the road. The nail needs to be in exactly the right position to puncture a modern tire. That only happens in a very small amount of cases (or with a screw). Normally if it doesn't randomly happen the nail or screw gets pushed aside and does not puncture the tire. [1] This is not a statement based on expertise I am just offering another point to consider and am curious. [1] This I think is what happens with a paper cut sharp edge and precise angle.
  - dreamcompiler 8y ago
    At high closing speed, the determiner is whether the drone is in front of some part of the plane as the plane approaches. It's not going to be "pushed out of the way" because there just isn't time. Think about moths hitting the windshield of your car. They weigh thousands of times less than your car, yet they still routinely splat on your windshield as you're going down the highway. Why? Why doesn't the air flowing around your car push them out of the way?

by gist 8y ago

deleted 8y ago

[deleted]

dreamcompiler 8y ago

Two things: 1. Airplane wings are designed not to "push" forward on the air in front of them. That's drag and airplanes are designed to minimize it. 2. What little air is pushed forward is only going to be affected by the oncoming wing a few inches in front of the wing, and at 230 mph closing speed that doesn't provide nearly enough time for the force of the oncoming air to move the drone out of the way.

gist 8y ago
Thanks. But one question. What is the chance that a drone in the path of an airplane will not be impacted by the force of some other object on, or design of, the plane that is not the wing? For example the engine or the landing gear (small plane) or the fuselage? So we hover a drone in front of a small plane and will the small plane hit the drone? And if a larger jet will the drone remain in place or move out of the way by some force (not the wing). And remenber that the drone has to exactly strike in a particular way. As an example (of 'in a particular way') think of a nail on the road. The nail needs to be in exactly the right position to puncture a modern tire. That only happens in a very small amount of cases (or with a screw). Normally if it doesn't randomly happen the nail or screw gets pushed aside and does not puncture the tire. [1] This is not a statement based on expertise I am just offering another point to consider and am curious. [1] This I think is what happens with a paper cut sharp edge and precise angle.
- dreamcompiler 8y ago
  At high closing speed, the determiner is whether the drone is in front of some part of the plane as the plane approaches. It's not going to be "pushed out of the way" because there just isn't time. Think about moths hitting the windshield of your car. They weigh thousands of times less than your car, yet they still routinely splat on your windshield as you're going down the highway. Why? Why doesn't the air flowing around your car push them out of the way?