zsmith3rd(at)earthlink.ne
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 Posted: Tue Aug 28, 2007 1:51 pm Post subject: float charger |
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do not archive
There are two types of float chargers.
One is used to charge floats.
The other is highly classified (only used aboard navel vessels).
In the first case, any time a float doesn't it may be in need of charging. Use this type.
In the latter case, if the ship sinks, it'll no longer be afloat.
All seriousness aside, there are two terms commonly applied to the maintenance of banks of cells as might be used in microwave sites, telephone central offices, etc. The bank of cells connected together makes up the "station battery". This is a nominal 48 volts in U.S. phone installations; Float may be set to 56 volts. This "equalizes" the cells.
The charger usually has two settings.....the Float setting at nominal station voltage to supply the DC used by the attached equipment, and, the Equalize setting at some higher voltage. The Equalize kicks in once a month or at some other predetermined time, and slightly "overcharges" the bank for some period.....maybe 24 hours.
Thus the terms "float" and "equalize".
Nothing much to worry about when building airplanes with one battery containing six cells.
The prop, on the other hand, does have a prime function: Keep the pilot cool.
This is proved by watching him sweat if the prop quits.
Regards,
Zed
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