Re: TERRORIST ROBOT COUNTRTMEASURES
"Second: I am sure dozens of volunteers would be available to take positions around sensitive areas with nothing more than a shotgun using a heavy bird shot. These Helicopters are extremely sensitive to the slightest damage and could be easily disabled."
If they're RF helicopters, yes. If it's a plywood cruise missile with a pulsejet, no, you're going to do jack squat with your bird shot.
Look up the V1. It wasn't that long ago. And it used a pulse jet too.
It was a royal headache to shoot down without some heavier radar-guided artillery. Even 20mm holes from aircraft mounted autocannons didn't actually do that much. It could have several of those right through the pulsejet and still fly merrily. Unless you managed to actually set off its warhead, it just shrugged it all off.
Just about the only relatively good counter-measure the RAF came up with, was flying next to it, and pushing one of its wings up with the tip of your own wings. Basically turn it upside down, so it flies into the ground somewhere before it reaches a city.
I'd like to see you do that with volunteers ;)
Just as reference: a pulsejet is just about the simplest jet engine you can think up. It's just a length of pipe with a valve at the forward-pointing end. Air flows in through there, you inject fuel, ignite it, the resulting pressure closes the valve so the blast can only go out the other end. Then the pressure drops, the valve opens, and the whole cycle repeats again.
That's what made the V1 buzz, btw. The many explosions per second in its pulsejet.
It's a very robust thing too, unlike the complicated turbojets used on normal planes.
Since it's a metal pipe, you won't shoot that down with bird shot. And since most of the thrust is really generated by the first 1-2 inches of it, even riddling it with holes won't reduce its thrust by that horribly much anyway.
Finally, as an ex-AA guy with some training on the subject matter, I can tell you that shooting down anything that flies isn't that easy. We wouldn't need things like the phalanx system and sophisticated tracking computers, if any hunter with iron sights could do the same and just as reliably.