Great Planes Super Sportster (original) - Manual (Page 42)

INSTRUCTIONS
FO
R
BALANCING
YOUR SUPER
SPORTSTER
The
recommended
balanc
e point
for
th
e Super Sportsters
i
s
shown
on
th
e plan
, an
d
is
located
approximately
29%
back
fro
m
the
leading
edge.
However,
al
l Sportsters
hav
e been
thoroughl
y
test
flow
n
as
fa
r back as
36%,
an
d
foun
d
to
b
e completely stable
throughou
t th
e entir
e
range
fro
m
29%
to
36%
(These
number
s represent
a
percentage
of
the
total
win
g
chord, as shown
in
the
sketch)
.
Balance
Points
If
, when
balancing
your
Super Sportster,
you
fin
d
i
t necessary
to
add
several
ounces
of
nose
weigh
t to
balance
i
t a
t th
e location
shown on
the
plan,
i
t is
preferabl
e to
balance
farthe
r aft,
u
p
to
36%
(th
e af
t limit)
,
rathe
r tha
n
addin
g
a
lot
of
weigh
t As
you
balance
farthe
r aft
, however,
the
airplan
e wil
l become
more
responsive
to
elevato
r control;
therefore,
you
should
reduc
e the
maximu
m
elevato
r throw
i
n
accordance
wit
h
th
e
table
of
"Recommended
Maximu
m
Elevato
r Throws."
The
elevator
throw
is
measured
a
t the
widest
par
t o
f th
e elevator,
as
shown in
the
sketch.
The
best
way
to
balanc
e you
r Super
Sportster
is
to
mak
e a
Balancin
g
Stand
fro
m
a
squar
e of
1/4" plywood
an
d
tw
o
3/8"
dowels.
Mar
k
the
for
e an
d
af
t limit
s of the
balance
rang
e on
the
top of the
win
g
(on
both
sides
of
the
fuselage)
, an
d
place
the
airplan
e upsid
e down
on
th
e
balancin
g
stan
d
as
shown
i
n
th
e sketch (empty
fue
l tank)
. Move
th
e
airplan
e forwar
d
or
af
t on
th
e stand
unti
l i
t balances
wit
h
the
stab
level
.
If
i
t balances
outside
the
29%
to
36%
range,
you
mus
t eithe
r shif
t th
e
location
of
radi
o
components
or
add
weigh
t to
the
nose
or
tai
l unti
l i
t
balances
withi
n
the
range.
Take
note
of where the
airplan
e balances.
I
f i
t balances
near the
front
o
f the
recommended
range,
then
adjus
t the linkages to
your
elevator
to
provide
the
maximu
m
thro
w
listed
in
the
29%
-
30%
colum
n
in
the
table
below
I
f i
t balances
near
the
middle
of
th
e range,
set
you
r elevator
for
th
e
maximu
m
thro
w
listed
i
n
the
33
%
column
. I
f i
t balances near
the
af
t limi
t
of
the
range,
se
t you
r elevato
r for
the
maximu
m
thro
w
listed
i
n
th
e 36
%
column.
RECOMMENDE
D
MAXIMU
M
ELEVATO
R
THROWS
FOR
VARIOU
S
BALANC
E
POINTS
MODEL SPORTSTE
R
20
SPORTSTE
R
40
SPORTSTE
R
60
SPORTSTE
R
90
SPORTSTE
R
BIPE
(29-30%) L
E
t
o
CG
2-11/16"
3
"
3-5/16" 3-15/16" 1-1/2
"
MA
X
ELE
V
[5/16"
]
[3/8"
]
[7/16"
]
[3/
4
"
]
[3/8"
]
(337.
)
L
E
t
o
CG
2-15/16
"
3-3/8
"
3-3/4
-
4-3/8
"
1-7/
8
"
MA
X
ELE
V
[9/3
2"
"]
[11/32"
]
[13/32"
]
[11/16"] [11/32"
]
(367.)
LE
t
o
CG
3-3/16
"
3-5/8
"
4-1/16
"
4-13/16
"
2-1/16".
MA
X
ELE
V
[1/4"
]
[5/16"
]
[3/8"
]
[5/8"
]
[5/16"
]
•MEASURED
BACK
FROU
LE
O
f BOTTOM
WING
WARNING
! I
f you
balance
your
Super
Sportster
aft of
the
plan
location
but
fai
l to
reduce
the maximum
elevator
throw,
the
elevator
may
over
control
the
pitch
of
the
airplane,
an
d
may
result
in
unwanted
stalls
an
d
"sna
p
rolls"!
SSADDOl