>>545103
>Unless it works well.
Practicality involves more than just working well. It has to provide enough of an advantage over the alternatives to justify its disadvantages. A turbine-powered car works well, but it doesn't offer enough advantages to justify using it over an internal combustion engine. It's just a bad idea to implement that particular technology in that particular application.
>You're just arguing that space shuttles don't exist lulz.
Unironically; they actually shouldn't. They were a terrible waste of resources, as they cost orders of magnitude more than it would have cost to just fly all their missions with rockets, and we probably wouldn't have had those shuttle accidents. Maybe a few centuries from now the technology will catch up with the dream, but actually flying the space shuttle was a waste of resources and human life.
>>545109
>Here is an example, pic related, of a good idea, with an interesting, but completely incorrect (bad) implementation.
Only insofar as the good idea in question is "wouldn't it be neat if we had a flying machine", as opposed to the idea of a human-powered ornithopter. If you generalize an idea enough, I'm sure you could find a decent manifestation of it, but that doesn't make any of the other specific iterations of that idea good.
Yes, the idea of camouflage that can be changed to fit the environment is almost certainly a good one. That doesn't mean that the Type 2 system pictured above, or the alternative that I proposed to it, are practical. It would be just like pointing to a commercial airliner and saying that it's proof that a human-powered ornithopter is "practical". Your analogy supports my case.
None of this changes the fact that I'd like to see this technology developed. I'm just saying that the intended function of a technology isn't enough to make it practical.
Again:
Adaptive camouflage - potentially practical in some form for some applications.
The systems proposed above as material for a soldier's uniform - most likely far from practical.