Theory Design Air Cushion Craft 2009 Part 1 docx
Theory Design Air Cushion Craft 2009 Part 1 docx
... damage
Total
Damaged
41
31
19
5
18
21
5
14 0
Sinking
2
3
1
8
-
1
-
15
Total
43
34
20
13
18
22
5
15 5
16
Introduction
to
hovercraft
Fig.
1. 14
British sidewall hovercraft
HM- 218
in
operation
... period,
and
later
to
21m,
to
become
the
HM-2 21
(Fig.
1. 18).
Contents
Preface
xi
Acknowledgements
xiii
1.
Introduction
to
hovercraft
1
1 .1
Hoverc...
Theory Design Air Cushion Craft 2009 Part 3 pptx
... approxi-
mately
h
c
/2.5
then
h =
0.05
h
c
.
Thus
Air
cushion
wave-making
drag
91
2.0
1. 5
1. 0
0.5
.
a'/a=0.90
1
1
1
2a'
1
1
Fig.
3.6
Cushion wave-making drag ratio
as a
function
... drag
on
accelerating craft.
[ 21]
2.0
1:
c/g=0
2:
c/g=0.
3:cA?=0 .10
a:
cushion length
b:
cushion beam
c:
acceleration
d:
water depth
l/(2Fr)
Fig.
3 .10...
Theory Design Air Cushion Craft 2009 Part 4 doc
... interval
Craft
model
Skirt
drag
coefficient
June
19 68-June
19 69
Sept.
19 67-March
19 69
March
19 69-June
19 70
July
19 70-June
19 71
June
19 73-Feb
19 75
19 73 -19 76
N102
N300-02A
N102C
N102L
N300-02B
N500 ... water
11 9
X9.8N
16 000
14 000
12 000
10 000
8000
6000
4000
20 40 60 80 10 0 12 0 14 0
v(km/h)
2000
20 40 60 80
v(kn)
Fig.
3.33
The
drag
an...
Theory Design Air Cushion Craft 2009 Part 5 ppsx
... width
W
4
fi
c
lJB
e
PA
PC
Q
KG
Z
b,s
a
ft
5,
t
m
m
kgf/m
N/m
2
m
m
deg
deg
m
13 .7
13 .2
3.5
3.77
19 .93
2630
0.00757
1. 27
0 .15
60
89
0 .12
15 .95
15 .2
3.5
4.34
17 . 31
2630
0.00658
1. 27
0 .15
60
89
0 .12
18 .20
17 .3
3.5
4.94
15 .38
2660
0.00570
1. 27
0 .15
60
89
0 .12
correct,
... T
bl
Units
km/h
N/m
2
mVs
m
m
m
m
30.67
2690
23.65
0.402
0.0389
0 .15 35
0 .15 35
42.90...
Theory Design Air Cushion Craft 2009 Part 6 ppt
... Chinese
and
Western ACVs
Craft
identification
Nationality
Craft
type
711 -IID
China
ACV
7 210
China
ACV
716 -11
China
ACV
722 -1
China
ACV
SR.N6
UK
ACV
SR.N4
UK
ACV
AP .1- 88
UK
ACV
Rudder
installation
Vertical
Jetted
Vertical ... deformation
in SES air
cushion
19 7
Fig.
5.8
Wave
amplitude
due to an ACV on
shallow
water
in/off
air
cushion.
5.3
Water
surface
de...
Theory Design Air Cushion Craft 2009 Part 7 ppsx
... stabilizers
and air
propellers.
1:
yawing moment,
hull
only;
2:
yawing moment,
hul.
oroos.
fins.
-10 00
10 00
Y(m)
7(m)
-10 00
Time(s) Rudder angle
//
v,
0 _1
45° 1.
0.02
31. 3kn
> ;1
0° 2.
... .
2/3 + 1/ 3
r
b
/r
c
Three-dimensional
1
[
1
Two-dimensional
_
f
1/ 2 +1/ 2
r
E
/r
c
Three-dimensional
2
[1
Two-dimensional
_ [ 1/ 3 + 2/3
r
E
/r
c
Three-...
Theory Design Air Cushion Craft 2009 Part 8 ppsx
... 8 .16
shows
the
pitch response
y/^
to the
wave amplitude
as it
varies with
298
Motions
in
waves
1
1
*-„
~G
—
—
-Z
r
«_
l
"
—
r
]
—
*"
1
~c~
^p
V
_
1
X
(b)
Fig.
8 .11
... rectangle.
3.
Changes
of air
density
and
cushion pressure
in the
plenum chamber (air cushion)
are
considered
to be
adiabatic,
but the
outflow
of
cushion
air
into...
Theory Design Air Cushion Craft 2009 Part 9 potx
... waves
1. 0
riii
^
1. 5
2.5 3.5 4.5
5.5co
f
1. 5
2.5 3.5 4.5
5.5w
e
1. 3
/.D
:0
40
3.3(0
e
.—
i.J
^ J
J.J
t.J
^•^"'f
/TT
0.6 1. 0 1. 4 1. 8
2.2ca
e
-JlJg
0.6 1. 0 1. 4 1. 8
2.2w
f
V/
r
/s
-
... Stern
cushion
cushion
From
take-off
course
to
post-hump 15 00 15 00 14 00 14 00 Cushion pressure steady,
speed
of 40 kph
trim approx.
+5°
Running...
Theory Design Air Cushion Craft 2009 Part 10 potx
... cabin
Bridge/wheelhouse
Hydrofoil
Built
19 60
China
11 8
10 5 -10 7
11 0
Hydrofoil
Design
China
11 8
73
80
63
717 C
SES
China
83
80
89
719
SES
China
12 2
85
98
80
719 -11
SES
China
11 4
73
80
65
711 -IID
ACV
China
95
Griffon
ACV
UK
10 2
85
AP1.88
ACV
UK
88
88
78
W ... (%)
(%)
6408 (for
full-scale
craft)
15 33
(for models)
95
14
(for models
3970
12 700
10 900
1
7...
Theory Design Air Cushion Craft 2009 Part 11 ppt
... fan;
(b) air
duct;
(c) air
clear-
ance (under-skirt gap).
418
Lift
system
design
0 .10
0. 01
£
0.0 01
SRNlo
SRN5
H
e
0.05
SES -10 0B
10
10 0
10 00
Craft
weight (tonnes)
10 000
Fig.
12 .10
Relative
... weight
(t)
10 0
10 000
10 0
10 000
10 0
10 000
Opening
inlet,
integrated
fan
system
(on
craft
SR.N6,
SR.N4,
BH.7)
0. 016
0. 014
0. 012
0. 011
0...