Mecanica

β 0° 5° 10° 15° 20° 25° 30° 35° 40° 45°

ψr 1,00 1,20 1,28 1,33 1,35 1,36 1,36 1,36 1,36

1,36

Tabela 2 – Fator de Correção do Ângulo de Hélice para Resistência

Capítulo 9

(9.1)

Pr = Pt ⋅ tan α ⋅ cos δ

(9.2)

Pa = Pt ⋅ tan α ⋅ sen δ

(9.3)

zn =

z

cos δ

⋅ δ v 2 ±

Mt ⋅ cosδ

v i 2 ± 1 1

(9.4) b ⋅ dm 2

= 2 ⋅ f 2 ⋅ Mt

cos

⋅ 1 i

11 ⋅ 1

(9.5)

H = 2 ⋅ f 2 ⋅ ⋅ 1 1 ⋅

nec

2 1 i 2 1

2 1 2 1

(9.6)

msmin

3 2

min

R

⋅ (1 − sen δ )