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7/21/2019 Matching Chart Equation by Nafari Cahyadi
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STALL SPEED
(W S )V s
= 12
ρ V s2 C Lmax
= 12
(1.1116 ) (82) (1.8 )= 64.03 Kg
m3
MAX SPEED
( W ρSL)V max
=η p
12
ρ V max2 C Do
1
(W S )
+ 2 K ρσ V max
(W S )
K = 1π×e×AR
= 1π × 0.85 × 8
= 0.0468
σ = ρ ρo
= 1.11161.225
= 0.907
( W ρSL)V max
= 0.7 × 9.8
0.5 × 1.225 × (15 )3 × 0.015 1
(W S )
+ 2 × 0.04681.1116 × 0.907 × 15 (W
S )
¿ 6.86
31.01 ( 1W S )+ 0.00618 (W
S ) Kg /W
TAKE-OFF MAX
(W ρ )S¿
=
1 − exp
(0.6 ρgC D G
S ¿
( 1W S )) μ− ( μ+
C DG
C L R)[0.6 ρgC D G
S¿( 1W S )]
η p
V ¿
μ= 0.05
7/21/2019 Matching Chart Equation by Nafari Cahyadi
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∆ CL Flap ¿= 0.6
C Do HLD= 0.005
V ¿ = 1.1 × V s= 1.1 × 8 = 8.8
C L¿
= C LC + ∆ CL Flap ¿
= 0.3 + 0.6 = 0.9
oHLD.C D ¿
= C D o
+ C D ¿¿ = 0.015 + 0.005 = 0.02
C DoTO= C D¿
+ K C L¿
2 = 0.02 + 0.037 (0.9 )2= 0.05
C L R
= C Lmax
(1.1 )2= 1.8
1.21= 1.488
C DG
= (C D ¿
− μ C L¿)= 0.05 − 0.05 (0.9 )= 0.005
(W
ρ )S
¿
=
1− exp(0.6 × 1.137 × 9.81 × 0.005 × 2( 1W S ))
0.05 − (0.05 + 0.0051.488 )[exp(0.6 × 1.137 × 9.81 × 0.005 × 2( 1
W S ))] (
0.7
8.8 )× 9.8
7/21/2019 Matching Chart Equation by Nafari Cahyadi
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¿
1− exp(0.06691W S )
0.05 − (0.0534 )
[exp(0.0669
1W S )]
(0.779 ) Kg
W
RATE OF CLIMB
(W ρ ) ROC
= 1
ROC η p
+
√ 2
ρ√3 C Do
K (W S )(
1.155
( L D)maxη p )
¿ 1 × 9.8
1
0.7+√ 2
1.37 √ 3 (0.015 )0.0468
(W
S )( (1.155 )20 × 0.7 )
¿ 1× 9.8
1.428 +(√1.794 (W S ))(0.0825 )
KgW
SERVICE CEILLING
ROC pada keadaan sea level = 0.5ms
( W ρSL)=
σ
ROC
η p
+√ 2
ρ √3 C Do
K
(W S )( 1.155
( L D)maxη p)
7/21/2019 Matching Chart Equation by Nafari Cahyadi
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¿ 0.898 × 9.8
0.5
0.7+√ 2
1.10076 √3 × 0.015
0.0468
(W
S )( 1.155
20 × 0.7 )
¿ 8.8
0.714 + √0.401 (W S )(0.0825 )
KgW
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