"If you think that an aircraft that is anything bigger than a small pigeon could get anywhere near a major airport without getting itself a nice escort, then you're nuts."
I'm reasonably sure I've got several "aircraft" in my shed which I could easily use to overfly "a major airport" if I chose to do so.
This one, for example, is at least medium or large pidgeon sized (610mm wingspan): http://www.flickr.com/photos/bigiain/5228554566/ - the flight in that video was around 2.5km from the intersection of the runways at Sydney Airport. That plane (with the camera on board) can fly for ~23 minutes doing 20m/s. That'd give me a comfortable 10mins loiter time over the airport while still being comfortably able to retrieve the camera and it's SD card.
Note - that's barely more that $100 worth of stuff, it's less than 150g all up flying weight, and it's got so little metal in it that I'd be astounded if the regular airport radar could distinguish it under ideal conditions, never mind while it's only a few tens of meters up and buried in the ground clutter.
Note2 - that plane would require retrieval to get the images back, someone actually interested in getting airport pictures without getting caught could use a slightly larger plane carrying a video transmitter sending pictures, never intending to get the plane back (ideally, I guess, ditching the plane at sea to avoid anyone seeing it - a hollow balsa/film construction that'd sink easily might be better than a foam "floating" construction.)
Note3 - that plane as it's configured now isn't flyable at 2.5km range, but there's lots of hobbyists who've worked around the problems there.
Comments
"If you think that an aircraft that is anything bigger than a small pigeon could get anywhere near a major airport without getting itself a nice escort, then you're nuts."
I'm reasonably sure I've got several "aircraft" in my shed which I could easily use to overfly "a major airport" if I chose to do so.
This one, for example, is at least medium or large pidgeon sized (610mm wingspan): http://www.flickr.com/photos/bigiain/5228554566/ - the flight in that video was around 2.5km from the intersection of the runways at Sydney Airport. That plane (with the camera on board) can fly for ~23 minutes doing 20m/s. That'd give me a comfortable 10mins loiter time over the airport while still being comfortably able to retrieve the camera and it's SD card.
Note - that's barely more that $100 worth of stuff, it's less than 150g all up flying weight, and it's got so little metal in it that I'd be astounded if the regular airport radar could distinguish it under ideal conditions, never mind while it's only a few tens of meters up and buried in the ground clutter.
Note2 - that plane would require retrieval to get the images back, someone actually interested in getting airport pictures without getting caught could use a slightly larger plane carrying a video transmitter sending pictures, never intending to get the plane back (ideally, I guess, ditching the plane at sea to avoid anyone seeing it - a hollow balsa/film construction that'd sink easily might be better than a foam "floating" construction.)
Note3 - that plane as it's configured now isn't flyable at 2.5km range, but there's lots of hobbyists who've worked around the problems there.