S
BD
BPFI
=
⋅
N
⋅
1
+
PD
2
S
PD
BSP
=
⋅
⋅
1
−
2
BD
Fórmulas de cálculo aproximado (± 20%)
FTF
= 0.4 x S (a) o 0.6 x S (b)
BPFO
= 0.4 x N x S (a) o (b)
BPFI
= 0.6 x N x S (a) o (b)
BSP
= 0.23 x N x S (N < 10) (a) o (b)
= 0.18 x N x S (N ≥ 10) (a) o (b)
48
⋅
cos
Θ
2
BD
⋅
cos
Θ
PD
N300 - V
. 1.5 04/2016
er