ilektron - the truth is you are probably a decent human being just working on a legitimate project. That's what I think anyway. But if you're being secretive about it, I, and aparrently the others here too, are not inclined to help you. Are there document incidents of people carrying out terrorist attacks using RC airplanes? I don't know of any. And we in the hobby plan to keep it that way. It will take exactly one nutjob stuffing a bird with dynamite or cyanide or nuclear material and killing someone for the government to make some knee jerk regulations in order to look like they are doing something about it. So we hobbyists are very wary of people asking questions like you are asking, because we don't want to even give the appearance of this sort of experimenting being ok. The truth is, a 2 pound payload could easily be a small scale experiment to ramp up later into a much bigger project. As one other poster wisely indicated, if you are working on a project that is so classified that you can't talk about your payload, then you are working for a company that can hire an experienced modeler to consult with you. Your story doesn't add up, and I for one hope to not see posts from you on this forum again.

Paul