Let's design a fake Perpetual Motion machine
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From: MooseFET on 15 Mar 2010 09:21 On Mar 15, 1:27 am, Bill Beaty <bi...(a)eskimo.com> wrote: > On Mar 14, 11:36 am, "Sue..." <suzysewns...(a)yahoo.com.au> wrote: > > > Hardly worth the design time. > > It's the Randi technique: a good fake can lead many onlookers to think > more critically, and might even cause some of the believers to think > twice. > [...] If you split a chunk of wood, you can glue it back together along the split and the split can be near impossible to detect. The chunk of wood can be hollowed out so that batteries, electronics and a a coil can be hidden inside. Tubing can works as the structure for holding stuff up and as a way to hide the energy source. It can also work as a way to bring compressed air to the machine through a hidden pipe. A table can have a powerful electromagnet hidden under it. If most of the machine is nonmagnetic the magnetic part that is attracted by the magnet can be some distance above the table. The entire room can be on a giant turntable. If all the light sources and the camera etc are all in motion, a stationary weighted wheel would appear to be rotating. You can give an object with low friction a spin with your hand and it will spin for a few minutes. Reverse the direction of the tape and then dub in your voice and you have a device that speeds up over time. If really low amounts of power are needed, the natural changes in air temperature and pressure can be used as a power source.
From: Sam Wormley on 15 Mar 2010 10:09 On 3/15/10 8:11 AM, bert wrote: > On Mar 14, 12:02 am, Sam Wormley<sworml...(a)gmail.com> wrote: >> >> The total momentum-energy of the universe is fixed and constant. > > Sam My lastest idea is to marry a wind turbine to large flywheel. Its > machanical energy all the way down TreBert Put one on your boat, Herb!
From: Bill Beaty on 15 Mar 2010 13:48 On Mar 15, 7:09 am, Sam Wormley <sworml...(a)gmail.com> wrote: > Put one on your boat, Herb! Or on a railroad cart. Hey, David Jones has a PM machine movie! http://www.youtube.com/watch?v=cf7czii7dH0 ((((((((((((((((((((((( ( ( (o) ) ) ))))))))))))))))))))))) William J. Beaty Research Engineer beaty a chem washington edu UW Chem Dept, Bagley Hall RM74 billb a eskimo com Box 351700, Seattle, WA 98195-1700 ph206-762-3818 http://staff.washington.edu/wbeaty/
From: Greegor on 15 Mar 2010 19:12 Is there any math on how fast ""permanent magnet"" generators (or DC motors used in that role) wear down their magnets?
From: Tim Williams on 15 Mar 2010 19:44
"Greegor" <greegor47(a)gmail.com> wrote in message news:0ef57af7-3070-48b1-a225-5e89d2917809(a)q16g2000yqq.googlegroups.com... > Is there any math on how fast ""permanent magnet"" > generators (or DC motors used in that role) > wear down their magnets? By "stressing" a permanent magnet (i.e., applying opposing magnetization), you drive its B-H curve slightly backwards. If you push it past the coercive force Hc, you'll demagnetize it. Fortunately, this takes an awful lot of magnetization (ca. 1MA/m). For normal operating levels, you only push the magnet a little way back along the B-H curve. Because it's quite square, the drop in remanence (field strength) is small, and after an initial burn-in at full load, it will remain quite the same for the rest of its operating life. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms |