FLIGHT REFERENCE CARDS

Yakovlev YAK-52

NORMAL DRILLS

©Aerobuild Ltd
Prepared by Freestone Aviation
Gamlingay, Cambridgeshire

NOTES TO USERS

These Flight Reference Cards are complimentary to the Yakovlev Yak-52 Flight
Manual (AB/FA/52 Issue 2). Throughout this publication the following
conventions apply:-
a) Words in capital letters indicate the actual markings on the controls
concerned.
b) Unless otherwise stated, all airspeeds quoted are indicated.
c) Heights given are imperial with metric  conversions in  brackets to cater
for either  altimeter type fitted.

WARNING
Whilst every effort has been made to ensure accuracy of transcription and
content, no responsibility can be accepted for any errors howsoever caused,
nor for any subsequent loss or injury arising from such errors.  Reliance
placed upon the contents of these cards is at the user’s own risk.

EXTERNAL CHECKS

General position   Clear of other aircraft
     Wheels chocked (if required)
     Room to taxy

AT THE COCKPIT

Magnetos    OFF
Flying controls   Locks removed
Air pressure   50kgf/cm² min both
NOTE:  If normal system air pressure is low ie 20 kgf/cm² or more, a start
may be attempted and the pressure built up on the compressor before taxy.
Otherwise, the system must be charged via the external connector, as must
the emergency system.

PORT MAINPLANE

Upper surface   Condition
Flap     Condition
Aileron Condition, lock removed freedom of movement hinges and push rod
secure, drain holes clear
Leading edge & under surface Condition

Pressure head   Cover removed, security and cleanliness
Stall warner (if fitted) Freedom of movement
Fuel tank cap and Security, Visual Contents check cover plate
Access panels   Security

PORT UNDERCARRIAGE

General    Condition and security
     Oleo extension 205mm
Wheel     Tyre for cuts and creep
     Tyre pressure 3-3.5 bar (40-45 psi in USA)

FRONT FUSELAGE AND ENGINE

Air system water trap  Drain, ensure shut
Cowlings    Condition and security
Gills     Condition and security
Propeller Condition and security, check prop alignment marks, no leaks, hub
split pin in place.
NOTE: If the engine is cold or for the first run of the day turn the engine
by hand through at least nine blades to check for hydraulic locking.  If a
quantity of oil drains from the exhaust, pull through 36 blades before
attempting to start the engine.
Exhaust pipes   Condition and security
Carb air inlet   Condition and security
Oil tank    Visual contents check, cap and dipstick        secure. Litres:- 8
min;10 aeros;16 max

NOSE UNDERCARRIAGE
General    Condition and security
     Oleo extension 131mm
Wheel     Tyre for cuts & creep
     Tyre pressure 3 - 3.5 bar(40-45psi in USA)

STARBOARD UNDERCARRIAGE
General    Condition and security
     Oleo extension 205mm
Wheel     Tyre for cuts and creep
     Tyre pressure 3 - 3.5 bar(40-45psi in USA)

STARBOARD MAINPLANE
Upper surface   Condition
Flap     Condition
Aileron Condition, lock removed freedom of movement hinges and push rod
secure, drain holes clear.
Leading edge and  Condition of under surface
Oil cooler    Condition, matrix clean.  Winter baffle        plate secure
Fuel tank cap and Security, visual contents check cover plate
Access panels   Security

EXTERNAL CHECKS (cont’d)
STARBOARD FUSELAGE
General    Condition
Aerial    Condition and security

TAIL UNIT
General   Condition
Rudder   Freedom of movement hinges and cables secure
Elevators   Freedom of movement hinges and cables secure
Trim tab   Condition and security

PORT FUSELAGE
General    Condition
Gnd Pwr socket cover  Secure if not used
Pneu charge cover Security

COCKPIT
Glazing    Condition, ensure clean

INTERNAL CHECKS
REAR COCKPIT
Ensure no loose articles
Flap selector   Neutral
Magnetos    1 + 2 (ON) see note
U/C selector   Neutral, safety gate in
Ignition control switch Cabin 1 (UP)
Starter button   Shielded
Fault simulation switches OFF
Harness    Secure if solo
Canopy    Close and lock if solo

NOTE:  The rear magneto switch should remain OFF until priming has been
completed but must placed to 1+2 (ON) before attempting to start.  On
British registered aircraft the flap and undercarriage selectors in the rear
cockpit are locked in Neutral.


PRE-START
Air     On, 50kgf/cm² min both
Brakes    On, parking catch engaged
Primer    As required (see note)
Battery Master (or External  ON, check 24V
power of required)
Generator switch   ON, check gen fail light on
Ignition switch   ON
U/C indication   ON, check 3 greens
Engine instruments switch ON
Lamp test    Operate, check lights
Fuel gauge    Check readings, test lights
Radio     As required
Intercom    As required
Throttle    Set 2 open
Starter    Operate (3-5 secs)
Magnetos    1+2 (on) after 3-5 blades
NOTE: Priming;  Cold = 8 pumps set to CYL with the propeller         pulled
through one blade per pump.
              2 pumps set to CARB
    Hot = Up to 4 pumps on CYL.
A warm engine must not be pulled through
All pulling through must be in the direction of rotation.
POST START
Throttle    38-41%
Oil pressure   1 kgf/cm² within 20 secs
Primer    Secure in neutral
Throttle    41-44% until oil temp rise
     41-48% for warm up.
The engine is considered sufficiently warm when the oil temperature = 40ºC
and CHT = 120ºC.
External power (if used) Disconnect, master sw ON
Radio     ON, tune, vol/sq adjusted
Intercom    ON
LH switch bank   All ON
DI     Light out, compare to S’by compass
Instruments    Check
Controls    Full and free movement
Radio call     As reqd; set QFE/QNH


INTERNAL CHECKS (cont’d)

FRONT COCKPIT
Ensure no loose articles


Rudder pedals   Adjusted, feet in stirrups
Parachute (if worn)  Adjusted and secure
Harness    Adjusted and secure
Canopy    As required
LH switch bank   All OFF
Flap selector   UP (Neutral if air press. low)
Trim     Neutral
Throttle friction   As required
Throttle    Full and free operation, set closed.
Propeller control   Set max rpm (fwd)
Fire cock/Fuel cock  Full and free operation, set open (fwd)
Magnetos    OFF
U/C selector   DOWN, safety gate in
Instruments Condition, readings, art. AI. start knob pressed
Emergency air valve  Ensure closed
Carb heat    Full and free operation set cold (fwd)
RH friction lever   As required
Oil cooler control  Full and free operation, set CLOSED (rear)
Cowling gills control  Full and free operation, set CLOSED (rear)
Inst. panel switch bank  All OFF
Cabin heater control  COLD
Headset/helmet   Plug in, loose cable secure
Accelerometer   Reset

TAXYING
Ensure all clear around aircraft
Chocks    Removed
Brakes    Test
Instruments    Test whilst taxying
POWER CHECKS
Clear area selected
Parking brake   ON
Ts and Ps    Check
Cowl flaps    Open fully
Oil cooler shutter  As required
Throttle     58%
Generator    Test, voltage check 27-29V,
     warning light out
Propeller    Fully fine
Throttle    70%, Brakes holding
Magnetos    Test, max drop 3%
Carb heat    Test
Propeller    Coarse, rpm drop to 53%
     Fine, rpm recovery
     Repeat 3 times
Throttle    Idle - 28-32% (max 5 mins)42-47%
PRE TAKE OFF
T-Trim    Neutral
T-Throttle    Adjust friction
    Propeller   Fully fine
    Oil cooler   As required
M-Magnetos    ON
M-Master switch   ON
P-Pitot heat   As required
P-Primer    Neutral
F-Fuel    On, sufficient for flight
F-Flaps    UP
G-Gauges    Checked and set, gyros,
     altimeter, Ts and Ps
G-Gills    Open
H-Hatches    Closed and locked
H-Harness    Secure
C-Carb heat    Cold
C-Controls    Full and free movement

TAKE OFF
Throttle    Fully OPEN
     Check manifold pressure,
     Ts and Ps, airspeed rising
Rotate    90km/h (49kt)
Lift off    110km/h (60kt)
Climb     160 km/h (86kt)

AFTER TAKE OFF
Undercarriage   Retract by 200km/h (108 kt)
Engine    Set climb power ‘Nominal 1’
     Ts and Ps
Radio     Set, clearances as required
Altimeter    QFE or QNH as required

IN-FLIGHT CHECKS
Pre Stalling, Spinning, Aerobatic checks (HASELL)
H- Height    Sufficient to recover by
     3000ft (900M) AGL
A-Airframe    Flaps and landing gear UP
S-Security    Hatches closed and locked,
     Harnesses secure, no loose articles
E-Engine Ts and Ps, fuel, carb heat, throttle and pitch as required
L-Location Clear of controlled airspace cloud and built-up areas
L-Lookout    Clearing turn

EN ROUTE/RE-JOIN CHECKS (FREDA)
F-Fuel ON and sufficient, diversion airfield selected
R-Radio ON, frequency and volume set, call as required
E-Engine    Ts and Ps, carb heat
D-DI Check, instrument service-ability, sync. light out
A-Altimeter    QFE/QNH as required


PRE LANDING CHECKS (DOWNWIND)
B-Brakes   OFF
U-U/C (below 200km/h)  DOWN - 3 greens and      mechanical indication
F-Fuel    ON, sufficient for go-around
F-Flaps (below 170km/h)  As required
P-Pitch    Fine
I-Instruments   Ts and Ps, altimeter set
C-Carb heat    Checked, then COLD
H-Hatches    As required
H-Harness    Secure

FINALS
P-Pitch    Fine
U-U/C     DOWN, 3 greens and mechanical indication
F-Flaps    DOWN (Vfe 170km/h/92kt)
A-Altimeter    Setting

GO-AROUND
Throttle    OPEN fully
P-Pitch    Fine
U-U/C     UP
F-Flaps    Retract by 170m/h (92kt)
A-Altimeter    Setting

POST LANDING
Vacate active runway and stop
Carb heat    COLD
Flaps     UP
Trim     NEUTRAL
Friction    As required
Electrics    Non essential OFF


SHUT DOWN

Position    As req. nosewheel straight
Parking brake   ON
Radio     OFF
Electrics    Non essential OFF
Cowl flaps    OPEN
Oil shutter    As required
Throttle     28-34% until
     CHT = 140-150ºC
     65-68% for 20-30 sec
     28-34% for 15 sec
Magnetos    OFF
All switches   OFF
Air     Off (clockwise)
Cowl flaps    CLOSED
Oil shutter    CLOSED

Vacate aircraft, fitting control locks as appropriate.  Drain the air system
water trap after each flight.  If a/c is to be left overnight, consider
fitting covers.

LIMITATIONS

MAXIMUM HEIGHT

As no oxygen system is fitted, the aircraft is limited to a maximum height
of 10,000ft.

MAXIMUM SPEED
Vne     420km/h (226kt)
Manoeuvring    360km/h (194kt)
Level flight   300km/h (162kt)
Canopy open    250km/h (135kt)
Landing gear extended  200km/h (108kt)
Flaps extended   170km/h (91kt)

STALLING SPEEDS
Normal    105km/h (57kt)
Inverted    140km/h (76kt)
Flaps extended   100km/h (54kt)

MAXIMUM WEIGHT
Maximum weight for all flight regimes 1315kg (2899 lb)

AEROBATICS
All aerobatic manoeuvres are permitted.  Aerobatics are not to be attempted
with landing gear or flaps extended.  Both canopies must be closed and
locked.

LOAD FACTORS
Max positive   +7.0g
Max negative   -5.0g

INVERTED FLIGHT
2 minutes maximum with 3 minutes erect before next period of inverted
flight.

CROSSWIND
Maximum crosswind component 6m/sec (12kt)

ENGINE LIMITATIONS
Take-off power is limited to a maximum of 5 minutes
Maximum RPM is limited to a maximum of 1 minute

OIL TEMPERATURE
Minimum    40ºC
Normal    50-65ºC
Maximum    75ºC max continuous
     85ºC full power
OIL PRESSURE
Minimum    1.0kgf/cm²
Normal    4.6kgf/cm²

FUEL PRESSURE
Minimum    0.15kgf/cm²
Normal    0.2-0.5kgf/cm²

CYLINDER HEAD TEMPERATURE
Minimum    120ºC
Normal    140-190ºC
Maximum    240ºC

CARBURETTOR INTAKE TEMPERATURE
Ideal range    10-45ºC

MAXIMUM ENDURANCE

Maximum flight range at a height of 1640ft (500m) and an airspeed of
210-215km/h (113-116kt) at 1315kg AUW (119 litres fuel) with 10% unusable
fuel supply in ‘Cruise 2’ engine running condition is 510km (275nm).  In
this case the flight duration is approximately 2 hours 45 minutes

YAKOLEV YAK-52

EMERGENCIES

CARD 8 (REAR)
ENGINE FIRE IN THE AIR
ENGINE FIRE ON THE GROUND
COCKPIT/ELECTRICAL FIRE
AIRFRAME FIRE

CARD 9 (FRONT)
ENGINE FAILURE ON TAKE OFF
ENGINE FAILURE IN FLIGHT
ABANDONING

CARD 9 (REAR)
DITCHING
RADIO FAILURE
ELECTRICAL OVERLOAD
PROPELLER OVERSPEED
HIGH OIL PRESSURE
LOW FUEL PRESSURE

CARD 10 (FRONT)
ROUGH RUNNING
AIRBORNE RE-START
UNDERCARRIAGE FAILURE
FLAP FAILURE
BORINGS IN OIL


ENGINE FIRE
Note: No engine fire extinguisher is fitted
Throttle    CLOSED
Fuel cock     OFF
Airspeed/r.p.m   Reduce by raising nose
Magnetos    OFF when engine cuts
Sideslip to try to keep flames away from the cockpit.

ENGINE FIRE ON THE GROUND
Throttle    CLOSED
Magnetos    OFF
Fuel cock    OFF
Parking brake Release to enable the aircraft to Be pushed away from burning
fuel the ground.

COCKPIT/ELECTRICAL FIRE
If fire/smoke has occurred shortly after an electrical switch has been
moved:  Reselect the particular switch to former position.
If fire/smoke persists:       All non essential electrics OFF.
If visible signs of fire: Land as soon as possible or, if parachutes are
worn, abandon the aircraft.

AIRFRAME FIRE
Dive the aircraft and sideslip to keep the flames away from the cockpit.
Put the Master switch to OFF.

If the fire goes out land as soon as possible at the nearest airfield; be
prepared for a higher stalling speed if the aircraft skin is damaged.

If the fire persists, land as soon as possible or, if parachutes are worn,
abandon the aircraft.

ENGINE FAILURE ON TAKE-OFF
Fuel cock   Check ON and quantity
Carburettor air   Hot
Magnetos    Both ON
Engine    Check indications
If possible maintain a speed of not less than 160km/h and lower the flaps as
required.  If time permits before landing, turn off the fuel and switch off
the ignition.  Tighten the harness and open the canopy.

ENGINE FAILURE IN FLIGHT
Proceed as for engine failure on take-off.
The best gliding speed is 160km/h with the flaps up.
Fuel     OFF
Magnetos    OFF
Harness    Tight
Make the initial approach at 160km/h with flaps up; open the canopy at 50m.
Lower the flaps only when certain of getting into the selected landing area,
and aim to cross the boundary at 160km/h with full flap or with flaps up.
At low speeds the rate of descent is very high.

ABANDONING
Throttle    SHUT
Fuel cock    OFF
Magnetos    OFF
Airspeed    110-120km/h
Flaps     UP
Canopy     Open
Mic/Tel leads   Disconnect
Seat Harness Release. Ensure parachute harness not released.
The pilot should bale out first, the rear seat occupant following once the
pilot is clear of the aircraft.  When baling out, endeavour to dive
downwards and away from the aircraft to try to avoid hitting the tailplane.
The aeroplane may be abandoned to either side or inverted.

DITCHING
No ditching experience has been obtained for this aircraft, but the
following is a general guide.
Harness    Tight
Canopy    Shut
Undercarriage   UP
Approach    Normal
Touch down Tail first at as low an air speed as possible.

RADIO FAILURE
Frequency    Correct frequency selected
Volume    Maximum
Squelch    Set
Mic/Tec plug   Securely inserted

ELECTRICAL OVERLOAD
Master switch   OFF
Reselect ON briefly to permit use of the radio and electrical circuits for
limited period.
Land as soon as possible.

PROPELLER OVERSPEED
Pitch     Coarse
Manifold Pressure   Reduce
Land as soon as possible

HIGH OIL PRESSURE
Oil Temperature   Monitor
Land as soon as possible

LOW FUEL PRESSURE
Primer    CARB, operate to maintain fuel pressure.
Land as soon as possible.

ROUGH RUNNING
Throttle Idle, advance slowly, if rough running remains set 72% to clear
plugs.
Land as soon as possible

AIRBORNE RESTART
Airspeed    160-220km/h
Throttle    2 Open
Primer    CARB, operate
If engine starts
Throttle    Max power for 1-2 secs
    Reset

UNDERCARRIAGE FAILURE
Emergency air pressure  Check, 40-50kgf/cm²
U/C selector   NEUTRAL
U/C emergency tap   Operate
U/C position   Verify DOWN, three greens and mech. indication.
If the undercarriage fails to lower on the emergency system or insufficient
air pressure is available the a/c must be landed wheels UP.  Do NOT retract
the U/C after lowering on the emergency system.  Do not close the emerg. air
tap until after the engine shut down on landing.

FLAP FAILURE
A flapless approach and landing must be carried out.  The approach speed
being 160-170 km/h.  The flare and the landing roll will be correspondingly
longer.

BORINGS IN OIL
If the “Borings in Oil” light illuminates in flight consideration must be
given to landing as soon as possible, as this could mean the engine oil is
contaminated with metallic particles and a potential engine failure.