Cessna 1978 Skyhawk 172N User manual

✓- PILOT'S OPERATING HANDBOOK
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· � ssna., 
Skyhawk
CESSNA MODEL 172N
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PERFORUANCE-
SPEcIFICATIONS CESSNA
MODEL 172N
PERFORMANCE
SPECIFICATIONS
SPEED:
llarrmum at SeaLcvel 125KNOTS
Cnrise, ?Stc Pwer at 8000 Ft . L22KNOTS
CRL-ISE: Recommendedl-ean Mixture with fuel allowance for
enginestart, taxi, takeoff, climb and45 minutes
reserve at 45ac
power.
?5]r Pover at 80O0Ft . Range 485 NM
{O Gallms Us$le F\el Time 4. 1 HRS
?Str Pcner at 8000 Ft . Range 630 NM
5O
Gallons Usablel\rel Time 5.3 HRS
llaximum Rangeat 10,000 Ft Range 575NM
{OGallms Usable F\rel Time 5.7 HRS
Ilarimum Range
at 10,000 Ft Range ?50NM
5O
Gallons Us$le F\el Time ?.4 HRS
RATE OF CLIMB AT SEA LEVEL ??OFPM
SERVTCE
CEXLII,TG 14,200 FT
TAKEOFF PERFORMANCE:
Grqrnd Roll 80bFT
Totd DistanceOver 50-Ft Obstacle 1440FT
IA:fDb|3 PENFORMANCE:
Grourd Roll 520 FT
Total DistanceOver 50-Ft Obstacle 1250FT
STALL SPEED
(CAS):
PleFs Up, Power Off 50 KNOTS
fhps Dwn, Power Off . 44 KNOTS
}IATTMUM WEXGHT 23OOLBS
STAh-DARD
EMPTY WEIGHT:
Sk3rha*k
. 1379
LBS
Sk-vhawkII . 1403LBS
}TAXIML'MI,'SEFULLOAD:
Skyhawk
. 921LBS
Skyhavk II . 897 LBS
BArcAGE ALLOWANCE 120LBS
tffIIG LOADING: Pounds/SqFt 13.2
PWER I,OADING: Pounds/HP 14.
4
Ft'EL CAPACITY: Total
StandardTanks 43 GAL.
L-orgRarge Tanks 54 GAL.
orl- CAPACTTY 6 QTS
E!{GII\-E:
Avco Lycoming O-320-H2AD
160
BHP at 2700
RPM
PROPELLER: Fixed Pitch. Diameter ?5IN.
or62-r
3

 
SKYHAWK
1977 MODEL 172N
 
 
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   

 
  

3., .c, r*;q1'1 xi* *&il *
I
:'
CONGRATUI,ATIONST *)
lt, CESSNA
MODEL 1?2N
CONCRATULATIONS..
..
Welcometo theranksof Cessna
owners!YourCessna
has
beendesigned
andconstructed
togiveyou themost
inperformance,
economy,
andcomfort. lt isourdesire
thatyou will find
flyingit,either
for
businessor
pleasure,
a
pleasant
and
profitable
experience.
This
Pilot's
Operating
Handbookhasbeen
prepared
as
a
guide
to help
you
get
themost
pleasure
andutility
from
your
airplane.lt contains
information
about
your
Cessna's
equip-
ment,
operating
procedures,
and
performance;
andsuggestions
for itsservicing
andcare.We
urge
youto read
it from coverto cover,andto referto it frequently.
Our
interest
inyour flying
pleasure
has
not
ceased
withyour
purchase
of aCessna.
World-
wide,
theCessna Dealer
Organization
backedby theCessna
Customer
Services
Department
stands
readyto serve
you. The
following
services
are
offered
by mostCessna
Dealers:
THECESSNA
WARRANTY,which
provides
coverage
for parts
andlabor,
isavailable
at Cessna Dealersworldwide.
Specificbenefits
and
provisions
of warranty,
plus
other
importantbenefits
for you,
arecontained
in yourCustomer
Care
Program
book,
sup-
plied
with yourairplane.Warranty service
isavailable
to youat authorizedGessna
Dealers
throughouttheworldupon
presentation
of yourCustomer
CareCard
which
establishes
your
eligibility
underthe
warranty.
FACTORYTRAINED
PERSONNELto provideyouwithcourteous
expertservice.
FACTORY
APPROVEDSERVICEEOUIPMENT
to provide
you
efficient
andaccurate
workmanship.
A STOCK OFGENUINE
CESSNASERVICE
PARTS
onhand
when
you
need
them.
. THELATEST AUTHORITATIVE
INFORMATION
FOR
SERVICING
CESSNA
AIRPLANES,sinceCessna
Dealers
haveallof the Service
Manuals
andParts
Catalogs,
keptcurrent
by ServiceLetters andService
News
Letters,
published
by
Cessna
AircraftCompany.
Weurge
allCessna
ownersto usetheCessnaDealer
Organization
to thefullest.
A currentCessnaDealer
Directory
accompanies
your new
airplane.
TheDirectory
is
revised
frequently,anda currentcopy can
beobtained
from yourCessna
Dealer.
Make
your
Directory
one
of your cross-country
flight
planning
aids;
awarmwelcome
awaits
you
atevery
Cessna
Dealer.
11

CESSNA
MODEL 1?2N TABLE OF CONTEI.ITS
TABLE
OFCONTENTS
SECTION
CENERAL . 1
LIMITATIONS . 2
EMERCENCYPROCEDURES. . . . . . . . . . 3
NORMALPROCEDURES..
.. .... 4
PERFORMANCE.. .. 5
wErcHT& BALANCE/
EQUTPMENT
LIST.
. . . . . 6
AIRPLANE
& SYSTEMS
DESCRIPTIONS. .....7
AIRPLANEHANDLINC,
SERVICE&MAINTENANCE. .. B
SUPPLEMENTS
(Optional
Systems
Description
&OperatingProcedures) . . . 9
This handbookwill be kept current by ServiceLetters
published
by CessnaAircraft
Company. These
aredistributed to CessnaDealers
and to thosewho subscribe
through
the Owner Follow-Up
System. lf you arenot receiving subscription
service,
you will want to keepin touch with your CessnaDealer
for information concerning
the changestatus
of the handbook. Subsequent
changeswill be madein the form
of stickers. Theseshouldbeexamined
andattachedto the appropriate
page
in the
handbookimmediatelyafter receipt;the handbookshouldnot be usedfor opera-
tional purposes until it hasbeenupdated to a current status.
iiil(iv blank)

CESSNA
MODEL 172N SECTION 1
GENERAL
SECT
oN1
CEN
ERAL
TABTEOF CONIENTS
Three View
Introduction
Descriptive Data
Engine
Propeller
Fuel
oil
Murimum Certificated Weights
Standard
Airplane Weights
Cabin andEntrv Dimensions .
Baggage
Space
and Entry Dimensions . 1-5
SpecificLoadings. 1-5
Symbols, Abbreviations andTerminology 1-6
General Airspeed Terminology and Symbols. 1-6
MeteorologicalTerminology . 1-6
Engine Power Terminology L-7
Airplane Performance andFlight Planning Terminology l-7
Weight and BalanceTerminology . l-7
Page
l-2
1-3
1-3
1-3
1-3
1-3
l-4
1-5
1-5
1-5
1-1

SECTION 1
GENERAL CESSNA
MODEL 172N
rflAX.
'1. Wingspanshown
wtth strobe
lights
Installed.
2. Maxrmumherghtshown
wrth nose
gear
depressed,
all trresand nose
strut properly
Inflated,
andflashrng
beacon
Installed.
3. Wheel
baselength
ts
65"
4. Propeller
ground
clearance
s 11 3/4"
5. Wing
area
ts
174square
feet.
6. Minrmumturntng
radius
(*ptvot polnt
to outboard
wtngttp) rs27' 5lz"
*
PIVOT
POINT
l-.- ,,
Figure 1-1.
1-2
Three View

CESSNA
MODEL 172N SECTION 1
GENERAL
INTRODUCTION
This handbookcontains9 sections, and includes the material required
to be furnished to the pilot by CAR Part 3. It also contains supplemental
data suppliedby Cessna
Aircraft Company.
Section1 provides basic data and information of general interest. It
also contains definitions or explanations
of symbols, abbreviations, and
terminology commonly
used.
DESCRIPTIVE
DATA
ENGINE
Number of Engines: 1.
Engine Manufacturer: Avco Lycoming.
Engine Model Number: O-320-HZAD.
Engine Type: Normally-aspirated, direct-drive, air-cooled,
horizontally- opposed,carburetor equipped, four-cylinder engine
with 320cu. in. displacement.
Horsepower Rating and Engine Speed: 160 rated BHP at 27O0
RPM.
PROPETLER
Propeller Manufacturer: McCauley Accessory Division.
Propeller Model Number: 1C160/DTM7557.
Number of Blades: 2.
Propeller Diameter, Maximum: 75 inches.
Minimum: 74 inches.
Propeller Type: Fixed pitch.
FUEL
Approved FueI Grades (and Colors):
100LL Grade Aviation Fuel (Blue).
100 (Formerly 100/ 130) Grade Aviation Fuel (Green).
1-3

SECTION 1
GENERAL
FueI Capacity:
Standard Tanks:
Total Capacity: 43 gallons.
Total Capacity Each Tank: 21.5
gallons.
Total Usable: 40gallons.
Long Range Tanks:
Total Capacity: 54 gallons.
Total Capacity Each Tank: 27 gallons.
Total Usable: 50gallons.
CESSNA
MODEL 172N
NOTE
To ensure maximum fuel capacitywhen refueling, place
the fuel selector valve in either LEFT or RIGHT posi-
tion to prevent cross-feeding.
ort
Oil Grade (Specification)
:
MIL-L-6082 Aviation Grade Straight Mineral Oil: Use to replenish
supply furing first 25 hours andat the first 25-hour oil change.
Continueto use until a total of 50hours has accumulated
or oil
consumption
hasstabilized.
NOTE
The airplane was delivered from the factory with a corro-
sion preventive aircraft engineoil. This oil shouldbe
drained after thefirst 25 hours of operation.
MIL-L-22851 AshlessDispersantOil: This oil must beused after
first 50hours or oil consumption
has stabifZ6.-
Recommended Viscosity For Temperature Range:
MIL-L-6082 Aviation Grade Straight Mineral OiI:
SAE 50 above 16oC
(60oF)
SAE 40between -1oC(30'F) and 32oC(90"F).
SAE 30between-18oC
(0"F) and 21oC (70oF).
SAE 20below -LzoC
(10"F).
MIL-L-22851
Ashless Dispersant Oil:
SAE 40or SAE 50above 16oC
(60'F).
SAE 40between -1oC
(30'F) and 32oC
(90"F).
SAE 30or SAE 40between -18oC
(0"F) and 21oC
(70"F).
SAE 30below -12oC
(10"F).
Oil Capacity:
Sump: 6 Quarts.
Total: 7 Quarts (if oil filter installed).
L-4

CESSNA
MODEL 172N
Maximum Useful
Skyhawk:
Skyhawk II:
SECTION 1
GENERAL
fiT
AXIftI UfrTCERTIFICATED
WEIGHIS
Takeoff, Normal Category: 2300lbs.
Utility Category: 2000
lbs.
Landing, Normal Category: 2300 lbs.
Utility Category: 2000
lbs.
Weight in Baggage Compartment, Normal Category:
BaggageArea 1 (or passenger
on childrs seat)-station 82 to 108:
120 lbs. See
notebelow.
BaggageArea 2 -Station 108to 142: 50 lbs. See note below.
NOTE
The murimum combined
weight capacity for baggage
areas
1 and
2 is 120 lbs.
Weight in Baggage
Compartment, Utility Category: In this category,
baggagecompartment and rear seat must not be occupied.
STANDAR,D AIRPTANE WEIGHTS
Standard Empty Weight, Skyhawk:
Skyhawk II:
897
lbs.
1379
lbs.
1403
lbs.
@621lbs.
597lbs.
CABIN AND ENTRY DIfrlENSIONS
Detailed dimensionsof the cabin interior andentry door openings
are
illustrated in Section6.
BAGGAGE SPACE AND ENIRY DIftlENSIONS
Dimensions of thebaggagearea and baggagedoor openingare illus-
trated in detail in Section
6.
SPECIFICLOADINGS
Wing Loading: 13.2
lbs./sq. ft.
Power Loading: 14.4
lbs./hp.
Load:
Normal. Categor
1-5