Cessna 402B 1973 - Page 40

OXYGEN
CONSUMPTION
RATE CHART
OXYGEN
DU
RAT ION C,AICU
LATION
:
TotolOxygen
Du-rotion
(Hours)
=
oxygen
Pressure
indicotor
reoding
-.i-
[oxyge
n
con
s
timption
FSI/
HRI
x
numbe
r
of
po
s se
ngers
4 pilot
consumption
rote]
Eru!!!(114.9
cu.ft.copociry)
(l
800
psi,oxygen
Pressure
indicotor
reodingI
l.
Plonned Flight -
Pilot
ond 6
possengers
ot20,000
feet'
i.
Frorn Cfiort -
At20,OOO feei oltitude
,
Possenger
flow
rote is
83
PSI/HR.
ond
the
pilot flow rote
isl30
PSI/HR'
3.
OxygenDurotion=l8OO+-
{6
x
83
+
130)
=
2'88
hours
ExlMpte,
(44.0
cu.
ft. copocity|
fl
800
psi,
oxyg6n
Pressure
ind icotor'
:
rood ing)
l- Plonned
Flight-Pilolond
3
possengersof 20,000
feet.
..
2.
FromChort-Ar20,000
feetoltilude,
posscngerflow
rofe is
217
PSI/HR.ond
fhe
pilotflow
rote
is
338PSl/HR'
3. OxygenDutolion=l8OO+
(3
x
217
+
338)
=
t
'82
hours
CYTINDER
CAPACIIY
CUBIC
FEEI
1r4.9
44.0
ATIIIU
DE
RANCE
FEEI
10,000
22,OOO
22,OOO
30,000
10,000
22,OOO
22,OOO
30,000
HOSE
AssE'IIBLY
coroR
ORANGE
RED ORANGE
RED
CONSU
'IlPTIO
N
PSlr/ H
R.
83
r30
217
338
2-32
Figure 2-10