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Comment Re:CFC-free foam caused it (Score 1) 94

It was said at the time that the white paint on the early shuttle tanks served to also keep the foam together and reduce drag on it.

They scrapped it to save money and increase payload by a tiny fraction. But mostly to save money.

Engineers: this is necessary.
NASA Bean Counters: nah.

Every freakin' time.

Comment Re:Spoiler alert (Score 1) 88

Interesting.

I'm building a solar battery from LTO cells and am now wondering about adding a simple square driver.

Gotta see if they're NMC or not. 20,000 cycle rating natively might go to 40,000?

Quote:
```
The length of relaxation period was
the same as current pulse, resulting in a Duty Ratio of 50% under PC charg-
ing. The average current for all three charging modes were kept the same
(1C, i.e., 2.2 A), thus the current during PC charging (2C, i.e., 4.4 A) was
twice as large as that during CC charging.
```

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