Eiri KY PIK-20 E Service Manual
PIK-20 E Service manual
SERVICE MANUAL
for
SELF LAUNCHING SAILPLANE
PIK-20 E
V EIRI KY
J
Kisällinkatu 8
SF 15170 Lahti 17
PIK-20 E Service manual
SERVICE MANUAL
for
SELF LAUNCHING SAILPLANE
PIK-20 E
SERIAL NO:
REGISTRATION:
This sailplane must be serviced in compliance with this Manual.
Approved by National Board of Aviation, Finland
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EDITION 2
JANUARY 80
ENGLISH
PIK-20 E Service manual
A
LOG OF REVISIONS
Any revision of the present Manual must be recorded in the following
table. The new amended text in the revised page will be indicated by a
Dlack vertical line in the left hand margin and the Revision No. and date
will be shown on the bottom of the page.
Rev
No.
Revised
Pages
Description
of Revision
Date
Signed
Edition 2
All pages
New Edition
(Replaces previous
edition dated
Nov. 1978)
Rev 1
II 8, 11
-9
New fuel tank.
S/N:s 20215,
20221 and up
Jan 80
EIRI
Rev 2
II-7
Assembly of
starter emergency
relay
S/N:s 20213, 20214,
20217 and up
Jan 80
EIRI
Rev 3
11-10
Change in
water tank
volyme
S/N:s 20247
and
up
Jan 80
EIRI
Rev 4
11-31
Revised control
surfaces balancing
instructions. S/N:s
20257 and up.
Mar
80
EIRI
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II SERVICE MANUAL
Page
TABLE OF CONTENTS
1. ASSEMBLY AND DISASSEMBLY
11-1
1.1
Preparation
II- 1
1.2 Wing assembly
II- 3
1.3 Tailplane
assembly
II- 3
1.4
Disassembly
II- 4
2. SYSTEM DESCRIPTION
II- 5
2.1 Powerplant
II- 5
2.2
Electrical system
II- 6
2.3
Fuel system
II- 8
2.4
Water ballast
11-10
3. DAILY CHECK
11-11
4. CARE AND MAINTENANCE
IM2
4.1 General care
H-12
4.2 Powerplant maintenance
11-13
4.3 Sailplane maintenance
h-26
4.4
After gear-up landing and after rough landing
II-30
4.5 Balancing of control surfaces
H-30
5. WEIGHT AND BALANCE
II-32
5.1 General
H-32
5.2 Weighing procedure
H-32
5.3 Calculations for
actual empty weight and moment
II-35
5.4 Calculations for minimum and maximum pilot weight
II-35
5.5
Sample Problem: Actual empty weight
and moment of the sailplane
II-36
6. TRANSPORTATION OF THE SAILPLANE AND
HANDLING ON THE GROUND
II-38
6.1 Transportation
II-38
6.2
Handling on the ground
II-38
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PIK-20 E Service manual
7. EQUIPMENT
11-39
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PIK-20 E Service manual
1. ASSEMBLY AND DISASSEMBLY
1.1 Preparation
Three or even two persons can easily assemble and disassemble the
PIK-20 E. Before assembly prepare the wing assembly tool, clean clot
hes, grease of mineral or synthetic basis. Clean and grease all fitting sur
faces, bolts, pins and control system connections.
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PIK-20 E Service manual
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Fig 2
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PIK-20 E Service manual
'X
1.2. Wing assembly (Figure 2)
—
Insert the right-hand wing ensuring that the wing bevel pins (1) and
(2) are in the seats (4) and (5) in the fuselage.
—
Insert the left-hand wing in the same way and watch that the bevel
pins (6) and (7) go correctly into their seats. Draw the wings together
with the wing assembly tool and install the main wing pin and secure
it using a Fokker-pin. It is necessary to lift the wing tips when using
the assembly tool.
— Connect the flap and airbrake control rods with quick release locks
and secure them with Fokker pins.
— Connect the water ballast hoses to the fuselage.
—
Install the venturi tube.
1.3. Tailplane assembly (Fig 3)
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PIK-20 E Service manual
A
—
Insert the horizontal stabilizer by moving the trim and flap lever to the
foremost position and by lifting the leading edge up a little and by
pushing the ball bearings (1) and (2) on to the pins (3) and (4) on the
vertical stabilizer.
— Pull out the locking pin (5) with a tool (Fokker-pin of the wing bolt)
and push the leading edge into place. Remove the tool and push the
locking pin in. Ensure that the
front fitting is engaged and secure the
pin using a Fokker-pin.
— Deflect
the elevator upwards
and connect
the elevator
control rod (6)
and secure it using a Fokker-pin.
1.4.
Disassembly
— The wings and horizontal stabilizer are removed in the reverse
sequence
to
assembly.
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PIK-20 E Service manual
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2.
SYSTEM DESCRIPTION
2.1 Powerplant
Engine description:
Type: Rotax 501
Two-cylinders in line two-cycles Otto engine
Air cooled
Oil mixed to fuel lubrication
Single magneto ignition
Propeller driven with a toothed belt reduction 2:1
Electric starter
Alternator
Fuel pump with impulse drive
Engine technical data:
Bore
2
x 72
mm
Stroke
61 mm
Displacement
496.7 cm
3
Compression ratio
10.8 (10.3-11.3)
Ignition system
Bosch-Magneto-Generator, SCP2,
12 V, 140 Watt alternator
Contact breaker gap
0.35—0.45 mm
Ignition timing
2.07 mm ± 0.25, 19° BTC
Spark plugs
NGK B8ES, Champion N3
Spark plug gap
0.4—0.6 mm
Carburettors
Tillotson Membrane carburettor HR
Main nozzle Gr. 0.046
Direction of rotation
Counter clockwise facing the engine
drive
shaft
Starter
Geared starter
Fuel
Min 96 octane (RON) Super gasoline or
Aviation gasoline 100LL, twostroke mix
Lubrication
Oil mixed to fuel lubrication, mixing ratio
1:40 with Super twostroke oil
Weight
With muffler and electric starter 33,5 kg
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Engine operational data:
Takeoff power
Max continuous power
75 % max cont. power
75 % max cont. power
Max continuous rotational speed
Max rotational speed
31.7 kW/43
hp/6200 rpm/100 km/h
29.4
kW/40
hp/6000 rpm/100 km/h
22.1 kW/30
hp/5500 rpm/100 km/h
22.1 kW/30
hp/6000 rpm/135km/h
6000 rpm
6800 rpm
appr. 2000 rpm
Idling rotational speed
Cylinder
head temperature Thermoring under spark plug, max
250°C allowed
100 % power: appr. 22,4 l/h
75 % power: appr. 17,2 l/h
Fuel consumption
Propeller:
Propeller model
Propeller diameter
Propeller type
1. HO 11#
127B 87
2. EP P127/87
1270 mm
Two-blade, wooden, fixed pitch
2.2 Electrical system
The 12-volt electrical system includes a 12-volt battery for starting and
use during soaring. The engine has an alternator in connection with the
magneto. The current is rectified and regulated by a Tympanium-type
rectifier, attached to the propeller axle.
The electric starter has 0.4 hp and is geared type.
The electric fuel pump is a solid state type.
Electrical switches are located on the left side of the instrument
panel
and the fuses are below the switches. The main switch operates
the main contactor which is located near the battery in the engine com
partment or below the instrument panel.
The starter knob operates the starter contactor, which is situated be
side the main contactor.
The ground terminals
of the
electric fuel pump and the starter contac
tor are connected to the ground over a microswitch. The engine positi
on operates the microswitch and the switch is connected only when the
engine
is
fully extended.
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-PIK-20 E Service manual
FIG 2.1: ELECTRICAL SYSTEM
V.
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Revision 2.21.8.-79
PIK-20 E Service manual
The engine hourmeter and an optional barograph are operated directly
by the alternator. They cannot be switched off and are only operating
when the engine is running.
The ignition switch is a dual switch and beside of the function as an
ignition shut off, it operates the tachometer and the fuel quantity gau
ge.
The ignition line is also connected to the microswitch and the ignition
is shut off when the engine is not fully extended.
The condition of the battery and the function of the alternator can be
checked by the voltage meter. The line between the red and black area
corresponds to 12 volts.
2.3 Fuel system
| The fuel capacity is 29 litres, of which 28 litres are usable. The fuel tank
is situated behind the backrest. Filler opening is on the fuselage
between the canopy frame and the wing: The fuel valve is situated on
the tank.
The fuel quantity can be checked from the electrical quantity gauge.
The fuel tank vent, in the cap, should be inspected daily prior to first
flight that it is free from obstruction. To avoid accumulation of the wa
ter and sediment, the fuel in the tank should be examined daily prior to
first flight and after refueling, by using the sampler cup provided to
drain
fuel from the tank. The drain valve is situated on the left fuselage
side.
The fuel filter is an inline paper filter type with 16 #jm filtration (0.6
microin) and nominal capacity 60 l/h (e.g. Purolator 00610). The filter is
in the baggage compartment after the fuel cock. The filter should be
changed every 25 hours or yearly.
The auxiliary electric
fuel pump is a solid state type and situated down
in the engine compartment.
The primary pump is an engine driven impulse type.
The carburettors are provided with a return line to avoid airbubbles in
the fuel feed.
Inspect and clean the tank carefully every year.
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Revision 1.21.8-79
PIK-20 E Service manual
A
FIG 2.2: FUEL SYSTEM
Carburettors
Fuel return line
Engine fuel pump
Fuel pump
Fuel filter
Fuel cock
sps
Filler opening with vent cap
Fuel quantity gauge
Fuel feed line
Fuel tank
Electric fuel pump f
Finger strainer
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