Jeppesen E6-B - Fuel Consumption Calculations; Finding Flight Time with Fuel

the
ircraft
is
always
placed
on
the
“
“AY
3600
index
on
the
“B”
scale.
ways
fi
ind
on
the
“A”
scale
directly
over
econds
on
the
“B”
scale,
or
over
time
in
min-
‘the
“C”
scale.
FINDING
SHORT
TIME
|
‘Flying
at
120
mop-h.,
for
a
distance
of
1.5
miles,
how
much
time
will
it
take?
This
problem
is
soived
as
follows:
(See fig. 10.)
|
1.
Rotate
the
“B”
scale
until
the
“36”
is
directly
at
under
120
m.p.h.,
on
the
“A”
scale.
}
2.7
-
locate
the
number
“15”
on
the
“A”
scale.
his
problem,
this
number
is
actually
“1.5”
‘rather
than
“15”.
i
Figure 10
The
answers
to
the
following
practice
problems
are
‘Fuel
consumption
problems
are
solved
in
the
same
man-
PRACTICE
PROBLEMS
—
SHORT
TIME
given
in
the
Appendix
of
this
manual.
1.
Speed
—
140
m.p.h.;
time
—
3
minutes;
how
far
would
an
aircraft
fly?
2.
Distance
—
2.5
miles;
time
—
one
minute
and
30
seconds;
how
fast
is
the
aircraft
traveling?
FUEL
CONSUMPTION
ner
:
ime
and
distance
problems,
except
that
gallons
ier
hour
and
gallons
are
used
in
lieu
of
miles
per
hour
and
miles.
FINDING TIME
If
an
aircraft
burns
fuel at
the
rate
of
nine
gallons
per
hour
and
has
45
gallons
of
useable
fuel
on
board,
how
fong
can
the
aircraft
fly?
The
steps
involved
in
solving
the
problem
are
as
follows:
(See
fig.
11.)
1. Rotate the computer disc until the speed index
is directly under “90, which represents 9 gal-
lons per hour in this problem.
hen. move clockwise on the “A” scale and
cate “45, which represents the 45 gallons
of useable fuel. Directly under this on the “C”
scale is found 5:00. The answer to our prob-
lem is 5 hours.
Figure 11