If Reagan hadn't wasted billions on SDI, there'd be railguns in the field now.
On Tue, Sep 7, 2010 at 9:08 PM, Mr. Worf <hellomahog...@gmail.com> wrote: > > > There had been talk about it. I think they decided to go with the railgun > program. > > > On Tue, Sep 7, 2010 at 9:53 AM, Martin Baxter <martinbaxt...@gmail.com>wrote: > >> >> >> I just read a report on the laser-based 747. As long as they don't waste >> money trying to reinvigorate SDI, I'm good. >> >> >> On Tue, Sep 7, 2010 at 9:40 AM, Mr. Worf <hellomahog...@gmail.com> wrote: >> >>> >>> >>> Yea, they have been using lasers to mark targets since the 70s. 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The lasers >>>>> wouldn’t shoot down the missiles, but would instead jam their sensors, >>>>> essentially blinding them. This isn’t the first time that laser >>>>> systems <http://www.gizmag.com/go/7461/> have been used for this >>>>> purpose, but the creators of *this* system claim that it is better >>>>> suited to helicopters than anything that has come before. >>>>> >>>>> The UM <http://www.umich.edu/> system detects incoming missiles, then >>>>> shoots at them with a mid-infrared supercontinuum laser. While most lasers >>>>> emit light of just one wavelength, supercontinuums pack a broad range of >>>>> wavelengths into their focused beam. Although such lasers typically emit a >>>>> beam of visible light, due to the fact that this is a mid-infrared >>>>> supercontinuum, its beam isn’t seen but is felt as heat. The resulting >>>>> broad >>>>> spectrum infrared beam mimics the electromagnetic signature of a >>>>> helicopter >>>>> engine, and causes the missile to lose track of where the actual >>>>> helicopter >>>>> is. It is said to be effective up to a distance of 2.9 km (1.8 miles). >>>>> >>>>> One of the big strengths of this system, according to its makers, is >>>>> its simple design and off-the-shelf fiber optic parts. “The laser-based >>>>> infrared countermeasures in use now for some aircraft have 84 pieces of >>>>> moving optics. They couldn't withstand the shake, rattle and roll of >>>>> helicopters,” said Mohammed Islam, a professor in the Department of >>>>> Electrical Engineering and Computer Science. “We've used good, >>>>> old-fashioned >>>>> stuff from your telephone network to build a laser that has no moving >>>>> parts.” >>>>> >>>>> Islam’s claims may soon be put to the test – his UM spin-off company, Omni >>>>> Sciences <http://www.omnisciinc.com/index.htm>, has recently received >>>>> US$1 million in grants from the US Army and the Defense Advanced Research >>>>> Projects Agency (DARPA <http://www.gizmag.com/tag/darpa>) to build a >>>>> second-generation prototype. >>>>> >>>>> >>>> >>>> >>>> -- >>>> "If all the world's a stage and we are merely players, who the bloody >>>> hell wrote the script?" -- Charles E Grant >>>> >>>> http://www.youtube.com/watch?v=fQUxw9aUVik >>>> >>>> >>>> >>> >> >> >> -- >> "If all the world's a stage and we are merely players, who the bloody hell >> wrote the script?" -- Charles E Grant >> >> http://www.youtube.com/watch?v=fQUxw9aUVik >> >> >> > > -- "If all the world's a stage and we are merely players, who the bloody hell wrote the script?" -- Charles E Grant http://www.youtube.com/watch?v=fQUxw9aUVik