Laminar Flow @ Terminal Velocity: The Perfect Suspension for ???Magnetic Fibers
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From: jimp on 9 Mar 2010 22:40 In sci.physics Bret Cahill <BretCahill(a)peoplepc.com> wrote: >> >> > If the goal is horizontal reflecting fibers on the ground all oriented >> >> > with respect to some angle with the earth's magnetic field, why would >> >> > anyone want the fibers to fall end on? >> >> >> Embed the fibers in a matrix, then stretch the matrix. >> >> That will align the fibers parallel to the direction of stretch. >> >> That was the breakthrough made by Edwin Land in the invention >> >> of Polaroid material. >> >> > The basic idea was enhancing satellite or high altitude surveillance >> > by dumping billions of cheap reflectors out of aircraft over swaths of >> > mountain areas. >> >> > When the Taliban disturbed the small reflectors it would appear on a >> > satellite laser - sensor system and reveal their activity, in real >> > time when it was cloudless. >> >> > The original idea was to orient fibers like compass needles as they >> > fell. The magnetization would be weak enough so they wouldn't clump >> > together. >> >> Other than getting the magic fibers to orient like compass needles, there >> is the little problem of the angle of incidence equals the angle of >> reflection so unless your magic fibers are spherical, which a fiber by >> definition is not, there is a narrow angular window where the magic >> fibers can be seen at all as "reflectors". > > You can get all your tuition money back in small claims court. Just > file your posts on this topic. > > > Bret Cahill We'll add "reflection" to the things about which you know nothing. -- Jim Pennino Remove .spam.sux to reply.
From: jimp on 10 Mar 2010 10:20
In sci.physics Bret Cahill <BretCahill(a)peoplepc.com> wrote: >> >> >> If the goal is horizontal reflecting fibers on the ground all oriented >> >> >> with respect to some angle with the earth's magnetic field, why would >> >> >> anyone want the fibers to fall end on? >> >> > No answer? >> >> > Bret Cahill >> >> Been answered several times. > > You just don't know where. > > Here, we'll try again: > > If the goal is horizontal reflecting fibers on the ground all oriented > with respect to some angle with the earth's magnetic field, why would > anyone want the fibers to fall end on? > > > Bret Cahill One more time: The only way you are going to get laminar flow with a falling long, thin object is if it is falling end on. The only possible stable orientation for a falling long, thin object is vertical and even then you have to make sure the center of gravity is forward of the center of pressure to make it happen. Therefor your entire premise of long, thin objects falling horizontally is babbling nonsense. -- Jim Pennino Remove .spam.sux to reply. |