More grist for the battle of the battery

Bill Daniels wrote:

What would be the advantage of this battery over the 12 volt, 7 to 9
amphour SLA for your application? Neither size nor weight seem important
in a battery of only 8 amphours, whether SLA or Li-ion. That's a Nimbus
you fly, right?


It's about a 6 pound weight savings. (1 Lb vs 7 Lbs) for 7-8 AH. That
allows the battery to be behind the panel with short wires instead of behind
the seat with long wires. Total weight savings are not that important but
the battery's effect on balance and weight of the 'non-flying' parts is.
I've been running W&B's and 6 pounds is important.

This is an interesting idea. It might be an easy way to power a
transponder with a separate battery, without the hassle and expense of
mounting a 6 pound battery somewhere it won't become a projectile.

The Becker and Microair transponders have max input voltages of 30
volts, so no problem with 16.2 full charge voltage that's an issue for
you. Encoders, like the ACK 30 I use, have similar values. It would mean
using two different chargers, one for the Li-ion, one for the SLA, but
that seems like a minor inconvenience.

snip

As for safety, the motorglider guys are flying around with GASOLINE, right?
That burns too.

Surprisingly, fire fed by the gasoline is a rare event in motorgliders
(wire fires seem more common, along with burns from the canopy focusing
the sun), and we continue to hurt ourselves in the usual ways glider
pilots do.


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Eric Greenwell
Washington State
USA