Cosa ne pensate?
http://www.newscientisttech.com/article/mg19125681.400;jsessionid=NMGHKBGMCGMM
Relativity drive: The end of wings and wheels?
The device that has sparked their interest is an engine that generates thrust
purely from electromagnetic radiation - microwaves to be precise - by exploiting
the strange properties of relativity.
[...]
This raises another question. Why haven't physicists stumbled across the effect
before? They have, says Shawyer, and they design their cavities to counter it.
The forces inside the latest accelerator cavities are so large that they stretch
the chambers like plasticine. To counteract this, engineers use piezoelectric
actuators to squeeze the cavities back into shape. "I doubt they've ever thought
of turning the force to other uses," he says.
Received on Sun Sep 24 2006 - 14:53:35 CEST