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|  MIL-E-7016F
Phase Unbalance Percent = 400 x 100 = 4.0 percent
10000
6.3.2 Battery charging currents. The charging current for any air-
craft battery shall be based on the total elapsed time from the beginning of charge,
and shall be calculated in accordance with the following formula:
I = Ax C
Where: I = Average charging current in amperes.
A = Ampere-hour capacity of the battery, based on
the l-hour discharge rate.
c = Battery charging factor taken from Figure 20.
Exception: If a battery charger or charge current control
device is used, the actual load drawn shall be
entered.
6.3.2.1
Sample battery charging current calculations.
a.
The capacity of the battery =
Given:
31.0 Ampere-hour
b. Operating
--inimum
M
--
Condition
time (t)
G-1
Not charging
Ground Maintenance
Not charging
Calibration
G2
Not charging
G-3
Loading & Preparation
5 minutes
G-4
Start & Warmup
10 minutes
Taxi
C-5
10 minutes
Takeoff & Climb
G-6
15 minutes
Cruise
G-7
20 minutes
G-8
Cruise-Combat
10 minutes
G-9
Landing
Not charging
Emergency
G-10
At the beginning of the Start and Warmup condition, G-4 is the start of
(1)
the battery charging. Since previous charging has not taken place, the
charging factor C is read directly from Figure 20 for the times indicated
in the chart below.
Charging Factor (C)
Time (Minutes)
3.37
0.08
2.77
1.00
2.10
5.00
21
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