TM 9-4940-549-14&P
KW FORMULA FOR HIGH ALTITUDES
(Standard rating is 12KW at altitudes from 1,000 to 5,000 feet)
6%
Actual Altitude - 5,000 feet
x
x 12Kw = KW Derating Factor.
1,000 feet
EXAMPLE :
6%
11,000 feet - 5,000 feet
x
1.
x 12KW = KW Derating Factor.
1,000 feet
6%
6,000 feet
x
2.
X 12KW.
1,00 0 feet
3.
.06 x 6 feet x 12 KW.
4.
.36 x 12KW = 4.32 KW Derating Factor.
5.
12KW Standard Rating - 4.32 KW Derating Factor = 7.68 KW.
6.
So, 7.68 KW (or 7.7 KW) is the actual rating at 11,000 feet altitude.
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