Piper SENECA III - Page 30

SECTION
1
PIPER
AIRCRAFT
CORPORATION
GENERAL
PA-34-220T,
SENECA
III
Route
Segment
A
part
of
a
route
Each
end of that
part
is
identified by:
(1)
a
geographical
location:
or
(2)
a
point
at
which
a
definite
radio
fix
can
he
established.
(f)
Weight
and
Bahmcc
Terminology
Reference Datum
An
imaginary
vertical
plane from
which all
horizontal
distances
are
measured
for
balance
purposes.
Station
A
location along
the
airplane
fuselage
usually
given
in
terms
of
distance in inches
from
the
reference
datum.
Arm
The
horizontal distance from
the
reference
datum
to
the
center
of
gravity
(C.G.)
of
an
item.
Moment
The product
of
the
weight
ofan
item
multi-
plied by
its
arm-
(Moment
divided
by
a
constant
is
used
to
simplify
balance calcu-
lations
bv
reducing
the number
of
digits
)
Center
of
Gravity
The
point
at
which
an
airplane
wou!d
(C
G.)
balance
if
suspended.
Its
distance from
the
reference
datum
is found
by dividing
the
total
moment
by the total
weight
of
the
airplane.
C.G.
Arm
The
arm
obtained
by
adding the
airplane's
individual
moments
and
dividing
the
sum
by
the
total
weight.
C G.
1,imits
The
extreme
center
of
gravity
locations
within
which
the
airplane
must
be
operated
at
a
given
weight,
t
able
Fuel
Fuel available
for flight
planning
REPORT: VB-ll10
ISSUED:
JANUARY
8, 1981
1-10
REVISED:
SEPTEMBER
23,
1983