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They would appear to be "on" continuously, at least from a persistence of vision point of view. Still just tinkering with the idea. Doesn't need to be as complicated as a brushless controller. Just needs cycle through the coils in sequence. I doubt there'll be enough of a feedback current for...

Has there been any followup? Athletes would be more concerned about performance in the event than the damage done. Yet, there was not one sentence or thought given to performance. Did the beneficial effects in fact enable him to train harder and more effectively? Did he perform better as a...

Has anyone tried a motor-less stir plate using sequenced electromagnets? I know it's difficult to beat the price on throw away muffin fans, but thinking all that wasted mechanical motion is pointless.

(BTW...) Coleman coolers are different from Rubbermaids and Igloos. The bore is about 1 1/8", and so doesn't work with cooler conversion kits, but the the plastic bulkhead takes a 1/2" male pipe fitting directly. It might not be a true pipe taper, though. It leaked about 1 small drop per hour...

1/2" pipe has an O.D. of 0.84".

I'm holding the spigot in hand this moment. The silicone seal flange measures 0.87 something, but it's a soft material and difficult to mic. I recall the bore being a good fit for 1/2" IPS, good clearance but not sloppy. 0.92" would be too loose (sorry, Day Trip). I can't measure the bore for...

That isn't too horribly bad. With enough insulation, enough of the 6000 BTU/hr will go into the wort. 7 gals pre-boil should heat up in 15 to 20 minutes. That's almost workable if you can live with the slow boil-off rate, maybe 3 qts/hr at best.

P.S.: Induction "burners" heat through magnetic induction, hence the requirement for a magnetic vessel. Since it doesn't actually burn, it should be possible to insulate the kettle in blankets or even a sleeping bag. This can cut the heat loss to where a 3 gal boil is easily possible. However, I...

1800 W is equivalent to about 6000 BTU/hr, comparable to a small kitchen burner. There's little question that it can boil wort. The question is how long? 12 gal of wort is about 100 lbs of liquid. It will take 4400 BTU to raise 100 lbs of water 44 deg F, from mash out temp to boil. An...

I hate to revive a long dead thread, but I have questions about the DudaDiesel chiller. The wort chart at http://www.dudadiesel.com/files/beerwortchart.pdf has some impossible looking numbers. For example, the very bottom line on the last page says 19 gal of 68^F water will cool 10 gal of...

Boiling off 3 qts more would give 5 gallons of 1.048. Weight of 5.75 gal at 1.043 = 49.7 lbs. Weight of 0.75 gal at 1.000 = 6.2 lbs Weight of 5 gal post boil = (49.7 - 6.2) = 43.5 lbs Weight of 1 gal post boil = 43.5 lb / 5 gal = 8.7 lbs Specific gravity = 8.7 lb/gal / 8.3 lb/gal = 1.048...