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Fundamentos de Engenharia Aeronáutica - Volume único

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253

v

estol

=

2 ⋅ 60

1,225 ⋅ 0,9 ⋅1,65

vestol

= 8,12 m/s

A força de sustentação durante o pouso para 0,7v estol é:

L = ⋅

2

⋅ (0,7 ⋅ v

)

⋅ S ⋅

2

estol

C L

1 ρ 276

1 2

L = ⋅1,225

⋅ (0,7 ⋅ 8,12)

2

⋅ 0,9 ⋅ 0,

L = 4,918 N

A correspondente força de arrasto é:

1 2

L

2

D = ⋅ ρ ⋅ (0,7 ⋅ vestol

) ⋅ S ⋅ ( C

D0

+ φ ⋅ K ⋅ C

2

)

1 2

2

D = ⋅1,225

⋅(0,7

⋅8,12)

2

D = 0,466 N

⋅0,9

⋅(0,022

+ 0,836 ⋅0,065⋅

0,276

Portanto, aplicando-se a Equação (4.110c) para a determinação do comprimento de

pista para o pouso da aeronave tem-se que:

)

S

L

=

g ⋅ ρ ⋅ S ⋅ C

Lmáx

2

W

⋅[ D + µ ⋅ ( W − L)]

0,7estol

S L

2

60

=

9,81⋅1,225

⋅ 0,9 ⋅1,65

⋅[0,466

+ 0,1 ⋅ (60 − 4,918)]

0,7estol

S

L

= 33,77 m

Para W = 70N

A velocidade de estol é:

v

estol

= 2 ⋅ W

ρ ⋅ S ⋅ C

Lmáx

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