Piper CHEROKEE ARCHER II Pilot Operating Handbook page 70

PIPER
AIRCRAFT CORPORATION-
ia-zs-iar,
cIIERoKEE ARcHER
II
SECTION
5
PERTORMANCE
(d)
Descent
Thedescentdatawillbedeterminedpriortothecruisedatatoprovidethedescentdistance
for
establishing the
total
cruise distance'
Utilizingthecruisepre.suxaltitudeandoATwedeterminethebasictime,distanceand
fuelfordescent(Figure5.2g,.rn.'.ng"*'qusjbeadjustedforthefieldpresurealtitudeand
temperature
.t.u;;'e;iination
,i.port.
io
find the
nrok.ry
adjustmentvarues,
use
the existing
pressur€
alutude and temper.ture
ionoitionr at
trre aestination airport
as
variables
to find the
time,
distan.r;;f;.ir"iu.,
rro* tiir ernl
t1is,1ry
l:29t N;*,
iubtract the
values obtained
from the field
conditions from
th;
;;il;;i1i"Ja
rrom tire
cru#
conditions
to
find the true
time, distan..
-Jf*i
values needed
for the flight plan'
The
values obtained
by
proper utilization
of
the
graphs
for the
descent segment
of
our
.*"*pir
*
shown
below.
.
_-:-
\
8.5
min.*
|
"*
ill
;',f*:.tL'l1.1lf
6"-fl'lJiif
fill}"r
m,es)
20'5 nauticar m,es*
|
(3)
Fuel
to
Descend
(2'o
gal
;inus I
gal')
I
r""ve'
l'0
gal'
(e)
Cruise
Using the
total distance
to
be traveled during the
fligtrt'
sub'tract'
the previously calculated
distance
to
climb
urd distance
to J.r.rno to esLu:istr6e
total
cruise
distance. Refer
to
the
appropriate Avco
Lycoting Op.,.io';t Manuat
*tt*
seiecting
the
cruise power setting' The
establistred pressure
altitrrde
"rd
;;;Tt,re
values
and the ,etected cruise power strould now
be
utilized
to
determine the tnre
.ir;;a ir;
tne
appropriate speeo power graph (Fieure 5'19
0r
s-2
t).
Calculatethecruisefirelflowforthecruisepowersettingfromtheinformationprovidedby
the Avco Lycoming Operator's Manual'
The cruise time is found
by dividing
q"
qu's:.
distance
by
the
cruise speed and the cruise
fuel is
rowrd'6
;itiplyi"t
tne
truise fuJt flow by the cruise
time'
The cruise calculations
established
for the cruise
scgrrrnt of otrr flight planning
example
are
as
follows:
(l)
Total Distancc
(2)
Cruise
Dirtutcc
(eXl)
minili?XO
minus (dX2)' (314 minus
tl'5
minus 20'6)
(3)
Cruise Power
(4)
Cruise
SPeed
isi
Cruise Fuel ConnrmPtion
(6)
Cruise Time
(eX2)
dividcd by
(eX4),
(2E2
nautical milcs dividcd
bv
I
t0
KTS)
(7)
Cruise Fuel
te)tSl muitiplied bv
(eX5)' (?'6
GPH multiplied bv
2'56 hrs')
314 nautical miles
282
nautical miles
65Vonted Power
I lO KTS
TASI*
7.6 GPH
2.56 hrs.
19.5
gal.
XEPORT:
Vrz9O
5-5
rrefercnce Figure 5-29
rrrefercnce
Figge
5-21
ISSUED:
It
I{E
18, 1976
REYISED: MAY
23' l9E0