Piper SENECA III User Manual

SECTION
6
PIPER
AIRCRAFT CORPORATION
WEIGHT
AND BALANCE
PA-34-220T, SENECA III
The
basic
empty
weight and
C.G.
location
are
recorded
in
the
Weight
and
Balance
Data
Form (Figure
6-5)
and
the
Weight
and
Balance Record
(Figure
6-7).
The
current
values
should always
be
used.
Whenever
new
equipment
is
added
or
any
modification work
is
done,
the mechanic
responsible
for the
work
is
required
to
compute
a new
basic
empty
weight
and
C.G.
position
and
to
write
these
in
the
Aircraft
Log
Book
and the
Weight
and
Balance
Record.
The
owner
should
make
sure
that it is done.
A
weight
and
balance
calculation is
necessary
in
determining
how
much
fuel
or
baggage
can
be
boarded
so
as
to
keep
the
C
G.
within
allowable
limits.
Check
calculations prior
to
adding
fuel
to
insure
against improper
loading.
The following
pages
are
forms
used
in
weighing
an
airplane
in
production and
in
computing
basic
empty
weight,
C.G.
position,
and
useful
load.
Note
that
the
useful
load includes
usable
fuel,
baggage,
cargo
and
passengers.
Following
this
is
the method
for computing
takeoff weight
and
C.G.
6.3
AIRPLANE
WEIGHING
PROCEDURES
At
the
time of
licensing, Piper
Aircraft
Corporation provides
each air-
plane
with the
basic
empty
weight
and
center
of
gravity location.
This
data
is
supplied
by
Figure
6-5.
The
removal
or
addition
of equipment
or
airplane
modifications
can
affect
the
basic
empty
weight
and
center
of
gravity.
The following
is
a
weighing procedure
to
determine
this
basic
empty
weight
and
center
of
gravity
location:
(a)
Preparation
(1)
Be
certain
that
all
items
checked
in
the
airplane
equipment
list
are
installed in
the
proper
location in
the
airplane.
(2)-
Remove
excessive dirt,
grease,
moisture,
foreign
items
such
as
rags
and
tools
from
the
airplane
before
weighing.
(3)
Defuel
airplane. Then
open
all
fuel
drains
until
all
remaining
fuel is
drained. Operate
each
engine
until
all
undrainable
fuel
is
used
and
engine
stops.
Then
add
the
unusable
fuel
(5.0
gallons
total,
2.5 gallons
each
wing).
REPORT:
VB-1110
ISSUED:
JANUARY
8,
1981
6-2
REVISED:
AUGUST
9,
1982

Piper SENECA III Specifications

General

Manufacturer	Piper Aircraft
Model	Seneca III
Engine Type	Piston
Engine Model	Continental TSIO-360-KB
Seating Capacity	6
Cruise Speed	188 knots (216 mph, 348 km/h)
Length	28 ft 7 in (8.71 m)
Max Takeoff Weight	4, 750 lb (2, 155 kg)
Horsepower	220 hp each
Service Ceiling	25, 000 ft (7, 620 m)
Height	9 ft 11 in (3.02 m)
Propellers	2-bladed constant speed