You'll get it if you've seen a picture of Peggy Liska, one of his first engineering friends. (I don't have a picture. In fact, I don't even know her very well.) Let me just say that the original joke had to do with capacitance of the main capacitors in a PC power supply.gtforme00 said:
One day, he brought a 0.1F, 50v capacitor that he was going to use for his model race car project. He had to call it "Peggy-sized", of course. (Oh yeah, the model car took off like a rocket. He used the capacitor itself as a weight to improve traction. It's about 1/10th scale.)
martin clark said:
Nano-LiFePo cells from A123-systems are worth checking out. Much more robust technology than traditional LiPo-batts and capable of serious peak power.
http://a123systems.textdriven.com/product/pdf/1/ANR26650M1A_Datasheet_APRIL_2009.pdf
Eight 26650 sized cells(~12v 4.6Ah) can provide 240 amps @ 9v for 10 seconds, possibly enough to start smaller gasoline engines. 8-cell pack weights less than 600 grams, so obviously you can use more...
Typical lead-acid car battery weights something like 15kg, so for the same weight you can put in 200pcs 26650 cells, capable to output 6000A or 50kW for 10 secs.
Battery pack like that is going to cost like hell, but still definetely cheaper than supercapacitors.- Status
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