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So the complaint is that it did not run 8 hrs (it only ran 5 1/2 hrs). So what are we going to be able to tell in the additonal 1 1/2 hrs that we were not able to tell by running it 5 1/2 hrs. I dont understand the logic here. Is 8 hrs some kind of break point that would eliminate a certain technology? If so, what?

For the small ecat eight hours is needed to show that it's self sustaining. Three or more days is needed to show that the source isn't a chemical reaction. The eight hour figure probably comes from the three or more hours that the ecat needs to be hooked up to a power source for it to warm up.

So the complaint is that it did not run 8 hrs (it only ran 5 1/2 hrs). So what are we going to be able to tell in the additonal 1 1/2 hrs that we were not able to tell by running it 5 1/2 hrs. I dont understand the logic here. Is 8 hrs some kind of break point that would eliminate a certain technology? If so, what?

They can calculate, based on the size of the device and how much heat is added to the device (Rossi spends hours heating up the device at the beginning of each test, supposedly to make the nuclear reactions work) how long it can produce heat once the heat is removed. None of Rossi's public tests have conclusively excluded the possibility of error or fraud. Rossi has a habit of promising more than his tests actually deliver.

Rossi claims that he's heated his factory for 6 months using his E-Cat, but he has show no evidence of doing so (not even his utility bills). The fact that his claims are so much more impressive than what he has actually shown anyone makes many people suspicious.

The whole process could be a chemical reaction (think your gas-stove burner) between the hydrogen gas (think natural gas) and the oxygen in the zirconia (think oxygen in the air). The whole thing has to be heated (think match or pilot-light) to get it started.

As we know, the reaction between natural gas and oxygen in the air is a very effective way to generate heat, to cook our food or heat our homes. The question is how long does it take to deplete the hydrogen in the fat-catE? The NASA guy apparently believes it is longer than the time used by Rossi.

So the complaint is that it ...

Calorimetry (measurement or heat or energy production) is NOT that hard to do in this day and age and easy to perform at the energy levels Rossi has been working at; the naysayers on the board would have trouble calculating the energy required to boil a pot of water to make coffee IMNSHO ...

"Basic Science" is beyond most people's capability today, and that is sad.