Cessna T188C - Page 263

MODEL
188
& T188
SERIES
SERVICE
MANUAL
SECTION 13
PROPELLERS AND GOVERNOR
WARNING
When performing
any
inspection
or mainte-
nance
that requires
turning
on the master
switch, installing
a battery,
or pulling
the
propeller through by hand, treat the propel-
ler as if the
ignition switch
were ON.
Do
not stand,
nor allow
anyone else
to stand,
within
the arc
of the propeller,
since
a
loose
or broken
wire, or a component
mal-
function,
could
cause the propeller
to rotale.
Page No.
TABLE
OF CONTENTS
Aerofiche/Manual
PROPELLERS
........... . 27/13-1
Time Between Overhaul ......
2B18/13-12
Description
. ....
. 2B7/13-1
PROPELLER
GOVERNOR
......
.2B18/13-12
Repair . ....
..... ... 2B7/13-1
Description' ...........
218/13-12
Trouble
Shooting .
..... .
. 2B8/13-2
Trouble
Shooting
.. ......
.2B18/13-12
Fixed-Pitch .
. ........ 2B9/13-3
Removal .
.......... 2B18/13-12
Removal and Installation . . . 2B9/13-3 Installation ......... . 2B18/13-12
Constant-Speed ..........
2B9/13-3
High-RPM Stop Adjustment
.... 2B18/13-12
Removal
..........
2B9/13-3 Rigging
Governor Control .
. 2B19/13-13
Installation
... .. . 2B9/13-3
Time Between
Overhaul ...... 2B19/13-13
13-1.
PROPELLERS.
of the piston.
Spring
tension and centrifugal
twist-
ing moment will move the blades to a lower pitch
13-2.
DESCRIPTION.
Aircraft equipped
with the
to maintain
the selected
engine speed.
During the
230 HP
engine may have
an all-metal,
fixed pitch
1969 model
year, a new threadless
blade
propeller
propeller or an all-metal,
constant-speed, governor-
is installed on aircraft
equipped with the 230 HP
regulated
propeller installed.
Aircraft
equipped with
engine. With
this type blades,
the propeller
balance
the 300
HP engine have
an all-metal,
constant-speed,
weights
are moved to a
bracket on the
propeller cyl-
governor-regulated
propeller
installed.
The constant-
inder nearer
the center line
of the propeller.
During
speed is
single-acting,
in which
engine
oil pressure,
the 1976
model year,
a three-blade
constant-speed
boosted
and regulated
by the
governor,
is used
to ob-
propeller
is optional,
and some
constant-speed
AG
tain the
correct
blade
pitch for
the engine
load.
En-
Aircraft
propellers
have
oil filled
hubs.
Figures
gine
lubricating
oil
is supplied
to
the power
piston
In
13-1
and 13-2
illustrate
the
different
propellers
used
the propeller
hub
through
the crankshaft.
The
amount
on
the aircraft.
and
pressure of
the oil supplied
is controlled
by the
engine-driven
governor.
An
increase
or
decrease
in
throttle
setting
ora
change
in aircraft
attitude
will
affect the balance which maintains
a given RPM. 13-3.
REPAIR Metal propeller repair
first involves
If the throttle is opened further orif aircraft speed evaluating the damage and determining whether the
is increased,
engine RPM will try
to increase. The repair
will be a major or minor one.
Federal Avia-
governor senses this and directs
oil pressure to
tion Regulations, Part 43 (FAR
43), and Federal
the
forward side of the piston. The
blades will be Aviation
Agency, Advisory Circular No.
43.13 (FAA
moved to a higher pitch setting
and engine speed
AC No. 43. 13), define major and
minor repairs, al-
will remain
constant. Conversely,
if the throttle
terations and who
may accomplish
them. When
mak-
opening or the aircraft speed
is decreased, the eng-
ing repairs or alterations to
a propeller FAR 43,
ine RPM
will try
to decrease.
The governor
senses
FAA AC No.
43.13 and
the propeller
manufacturer's
this and
allows oil
to drain from
the forward
side
instructions
must be observed.
Revision 1 13-1