EasyManua.ls Logo

Cessna 150J - Measuring Wing Twist

Cessna 150J
358 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
GRIND
--t--~
.1
(I
----
-
---
__
~--
~~
--'A
t-----==-1~r--
-
--
--
--
---
----+-
---
--- - - --;;;;"" T
iT
A
or
B
i['=D
~~====~r*~~==========~r~h~====~:~
___
~
I i I
MODLE
150
SERIES
A
2.00
2.00
1. 38
I
I
B
1. 00
1. 00
1. 00
C
29.50
29.50
24.00
!
I
WING
STATION
39.00
84.00
191.
00
ALL
WING TWIST OCCURS
BETWEEN
STA.
84.00
AND STA. 191. 00.
(Refer
to
paragraph
18-7
for
angle
of
incidence).
MEASURING WING TWIST
If
damage
has
occurred
to a
wing,
it
is
advisable
to
check
the
twist.
The
following
method
can
be
used
with
a
minimum
of
equipment,
which
includes
a
straightedge
(32"
minimum
length
of
angle,
or
equivalent),
three
modified
bolts
for
a
specific
wing,
and
a
protractor
head
with
level.
1.
Check
chart
for
applicable
dimension
for
bolt
length
(A
or
B).
2.
Grind
bolt
shanks
to
a
rounded
point
as
illustrated,
checking
length
periodically.
3.
Tape
two
bolts
to
straightedge
according
to
dimension
C.
4.
Locate
inboard
wing
station
to
be
checked
and
make
a
pencil
mark
approximately
one-half
inch
aft
of
the
lateral
row
of
rivets
in
the
wing
leading
edge
spar
flange.
5. Holding
straightedge
parallel
to
wing
station
(staying
as
clear
as
possible
from
"cans"),
place
longer
bolt
on
pencil
mark
and
set
protractor
head
against
lower
edge
of
straightedge.
6.
Set
bubble
in
level
to
center
and
lock
protractor
to
hold
this
reading.
7.
Omitting
step
6,
repeat
procedure
for
each
wing
station,
using
dimensions
specified
in
chart.
Check
to
see
that
protractor
bubble
is
still
centered.
8.
Proper
twist
is
present
in
wing
if
protractor
readings
are
the
same
(parallel).
Forward
or
aft
bolt
may
be
lowered
from
wing.
10
inch
maximum
to
attain
parallelism.
Figure
18-2.
Measuring
Wing
Twist
Change
3
18-7
I
I

Table of Contents

Related product manuals