Fig.
65
th
axis
of
sy
Fig.
68
ch
lines…
he
middle
line
mmetry
heck
free
run
o
s
form
the
of
the
Fig. 66
fo
is
identic
Fig. 69
…
base
olding
of
the
s
cal
to
the
first
…all
the
way
do
second
side
one
own
to
the
Fig. 67
…
Fig. 70
a
top
of
th
…as
far
as
the
ll
the
lines
ha
he
sail
in
the
m
15
wing
tip
ve
to
be
on
middle