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Fundamentos de Engenharia Aeronáutica - Volume único

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235

S

Lo

=16,291m

Para W = 80N

O coeficiente de sustentação ideal para a decolagem foi obtido no Exemplo 4.10:

C LLO

π ⋅ e ⋅ ⋅ µ

= 0

AR

2 ⋅φ

⋅ 0,717 ⋅ 6,83 ⋅ 0,03

C = π

LLO

2 ⋅ 0,836

C

LLO

= 0,275

O correspondente coeficiente de arrasto é:

C

D

C

D

C D

2

D0 L

= C + ( φ ⋅ K ⋅ C

= 0,022 + (0,836 ⋅ 0,065 ⋅ 0,275

= 0,02614

)

2

)

A velocidade de estol é:

v

estol

= 2 ⋅ W

ρ ⋅ S ⋅ C

Lmáx

v

estol

=

2 ⋅ 80

1,0581 ⋅ 0,9 ⋅1,65

vestol

=10,090 m/s

A velocidade de decolagem é 20% maior que a velocidade de estol, portanto:

v

= 1 , 2 ⋅

lo

v estol

v

lo

vlo

=1,2

⋅10,090

=12,109 m/s

A força de sustentação para 0,7v lo é:

L =

1 ⋅ ρ ⋅ (0,7 ⋅ v

2

)

⋅ S ⋅

2

lo

C L

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