View Full Version : Cool yer...Peltier junctions?

2002-Apr-11, 09:20 PM
This site is one for the kid who needs a good science fair project, not to mention total domination over the local galactic arm!


John Kierein
2002-Apr-12, 11:44 AM
This experiment needs to be repeated inside a mu-metal shield that eliminates background magnetic fields to determine if it's jsut a magnetic force.

2002-Apr-12, 04:08 PM
I agree, but it seems they have addressed this issue:

"Torque from coupling with the geomagnetic field:

Since this artifact could conceivably be reversible, we substitute a 10W 10 ohm power resistor for the Peltier assembly on the balance pan, and repeat our test sequence. NO weight change effect, reversible or otherwise, is seen."

So, mu metal shield, shielded conductors, Faraday cage and a high vacuum chamber, and let's mount it on a torsion balance to boot. It still might be more profitable than trying to wring another second of specific impulse out of a chemical rocket motor.