DOVA AIRCRAFT DV-1 SKYLARK Technical specifications

Flight Manual
for
DV-1 SKYLARK
Manufacturer:
DOVA AIRCRAFT, s.r.o.
Kirilovova 115
739 21 Paskov
Tel./fax: [phone] 139
This UL is not liabel to ÚCL ČR
and its using is on user risk!
Serial Number:
Registration Mark:
Date: October 2012
Classification: ULLa

SUMMARY
PART 1: GENERAL 3
PART 2: LIMITS 12
PART 3: EMERGENCY PROCEDURES 18
PART 4: STANDARD PROCEDURES 22
PART 5: PERFORMANCE 28
PART 6: MAINTENANCE 30
PART 7: DISASSEMBLING 31
OWNER – OPERATOR OF AIRCRAFT:
CHANGE OF OWNER:
Name:
Address:
Registration Mark:
Name:
Address:

Introduction
PART 1: General
Validity: This flight manual is
valid only for aircraft with the
registration mark mentioned
above on the first page.
Warning: The crew has to
know contents of this
manual before flight!

CAS calibrated airspeed. (CAS=TAS at sea level)
IAS indicated airspeed
TAS true airspeed
MSA international standard atmosphere
mac mean aerodynamic chord
SOP vertical tail surfaces
VOP horizontal tail surfaces
VA Maneuver Speed
VSO stall speed in landing configuration
Vs1 stall speed
VNE maximum speed
VFE maximum speed with flaps
VRA max. speed in turbulence
VPD runway
Note:
Indicated airspeed is used, unless otherwise noted .
ABREVIATIONS AND DEFINITIONS

THREE VIEW
2288 /90,08/
2863 /112,72/
5°
1092 /42,99/
1749 /68,87/
1486 /58,49/
776 /30,56/
8136 /320,32/
1756 /69,12/
6624,3 /260,80/
ø1 090 /42,92/
ø1 620 /63,78/
1367 /53,81/
4315 /161,89/
5

Aircraft DV-1 Skylark is a light sport, two-seater, all metal low-wing aircraft, with a tri-gear undercarriage
and stearable nose wheel.
Span 8,14 m 26 feet
Length 6,62 m 21.7 feet
Height 2,28 m 7.5 feet
2
Wing Area 9,44 m 102 feet
Mean aerodynamic chord 1,19 m 3.9 feet
Dihedral 5 °
Tires size 4,00" x 6
Wheel spacing 1,76 m 5.8 feet
Wheel base 1,36 m 4.5 feet
Tire Pressure for front wheel 160 ± 10 kPa
Tire Pressure for main wheels 180 ± 10 kPa
Ailerons: up 15° ± 1°
down 10° ± 1°
Flaps: Position -1 -10° ± 2°
Position 0 0
Position 1 +10° ± 2°
Position 2 +21° ± 2°
Position 3 +40° ± 2°
Elevator: up 30° ± 2°
down 20° ± 2°
Rudder: right 30° ± 2°
left 30° ± 2°
Empty weight from 285 kg
MTOW 600 kg
Baggage 20 kg
BASIC TECHNICAL DATA
DESCRIPTION
DIMENSIONS
CONTROL DEFLECTIONS
WEIGHTS

PROPULSION SYSTEM
ENGINE
PROPELLER
LIQUIDS
FUEL TANKS
Type Rotax R 912 S
RPM for take-off 5800 1/min (for 5min.)
Max. RPM 5500 1/min
Idling speed 1400 1/min
Type, manufacturer Kašpar KA 1/3, Kalmar, s.r.o.
Diameter 1620 mm
Turning to right
The recommendations of the engine manufacturer should be followed.
Fuel Premium unleaded 91 Octane
Max. vo lume of fuel 90 litres
Oil type Castrol GTX 5 10W-40
Max. volume of oil 2,5 litres
Cooling liquid ARAL Antifreeze
+distilled water 1:1 ratio
Max. volume of cooling liquid 2,7 l
Fuel tanks are placed in root of both wings.
Max. volume 2 × 45 litres
Unused volume 2 × 1,5 litres
Expansion volume 2 %
Warning:
The pilot of the aircraft is responsible for the
consequences of engine failure. It is recomended
that the aircraft be operated at a height and
speed to ensure the most safety in an emergency
landing in case of engine failure.
7

INNSTRUMENTS
Flight Instruments
Engine Instruments
Type
Type
Serial number
Serial number

Others
9

INSTRUMENT PANEL
1 2
3
4
5
6
13 914
10
11
18
19
28
15
26
27
23
21 25 24
22
20
29
15
12
7
Standard version
Description:
1. Airspeed
2. Altimeter
3. Variometer
4. Compass
5. Sideslip Ball 1
6. Trim control
7. Trim indicator
8. Manifold pressure
9. Fuel pressure
10. Oil pressure
11. CHT
12. Oil Temperature
13. Tachometer
14. Engine-clock
15. Fuel Gauge
18. Radio
19. Transponder
20. Fuel valve
21. Master Switch
22. Switches
23. Fuses
24. Starter
25. Magnetos
26. Choke
27. Throttle
28. Cabin Heat
29. Propeller

Aircraft DV-1 Skylark passed Ul-2 requirements for construction, material, and performance.
AIRSPEED CALIBRATION
PART 2: Limits

AIRSPEED LIMITATION
COLOURED MARKINGS ON THE AIRSPEED INDICATOR
Described speeds are for MTOW and Sea Level conditions. All speeds are Indicated Airspeeds (IAS).
Calibrated Airspeeds can be found from the above calibration.
Speed
Sign [IAS km/h] Importance
Maximum speed - Can only be exceeded in smooth air
and with -10 degree flap deflection.
white stripe 64÷120 -flaps
-normal
-smooth air and -10° flaps
-minimal speed
-maximal speed
80÷210
210 – 280
72
280
green
yellow
first red
second red
Max. cruise speed
- Can only be exceeded in smooth air and with -10 degree
flap deflection
Max. Maneuvering speed
Max. speed with flaps
Max. speed in turbulence
Stall speed
Stall speed with landing configuration
Abbreviation IAS /Km/h)
250
158
210
120
180
80
64
VNO
VNE
VA
VFO
VRA
VSO
Vs1
13

ENGINE OPERATING LIMITATIONS
WIND LIMITATIONS
FUEL VOLUME
WEIGHT
The recommendations in the Rotax engine manual are to be followed.
Oil pressure max. 7 bar, min. 0,8 bar
normal 2-5bar
Oil temperature min. 50°C, max. 130°C
normal 90-110°C
CHT max. 135°C
Exhaust gas temperature max. 880°C –start
max. 850°C – flight
normal 800°C
Fuel pressure max. 0,4 bar
normal 0,15-0,4 bar
RPM idling 1650 rpm
Maximum Continuous 5500 rpm
Maximum for 5 minutes 5800 rpm
Note:
- take-off is prohibited if values indicated on the engine instruments are not within the allowed range or
the engine is not working properly.
Maximum value of wind in the direction:
- of the runway (against or with ) 12m/s
- 90° to the runway 5m/s
Maximum volume of one tank 45 litres
Volume of both tanks 90 litres
Minimum volume for take-off 10 litres
(in one tank)
Empty 285 kg
MTOW 600 kg
Baggage 20 kg
Min. pilot weight 60 kg
Max. Pilot weight 120kg
Center of gravity position:
Front 24% SAT
Rear 36% SAT

Weighing Procedure:
Aircraft is placed on three scales in a horizontal position (upper edge of front fuselage to be level).Note
the values and the dimensions X and Y. Count as follows.
1000
1190
T
119
M2/M3
M1
Y
Csat
Center of gravity position:
T = ( X * ( M2+M3)/(M1+M2+M3) – Y – 119 ) / 11,9 (% mac)
Examples of C.G. position for Aircraft with BRS
1. Empty
Fuel (l) = 0
Left pilot (kg) = 0
Right pilot (kg) = 0
C.G. position (%mac) = 13.5 %
Weight (kg) = 297
2.With pilot 86 kg
Fuel (l) = 0
Left pilot (kg) = 86
Right pilot (kg) = 0
C.G. position (%mac) = 25 %
Weight (kg) = 383
3. With pilot 60 kg
Fuel (l) = 0
Left pilot (kg) = 60
Right pilot (kg) = 0
C.G. position (%mac) = 22 %
Weight (kg) = 357
4. With 2 pilots 86 + 47kg + 20kg baggage
Fuel (l) = 0
Left pilot (kg) = 86
Right pilot (kg) = 47
baggage = 20
C.G. position (%mac) = 35 %
Weight (kg) = 450
5. With 2 pilots of 86kg
Fuel (l) = 0
Left pilot (kg) = 86
Right pilot (kg) = 86
C.G. position (%mac) = 32 %
Weight (kg) = 469
With following MTOW lies center of gravity from 21 to 36% of mac.
15

ALLOWED TURNS (VIZ UL-1)
LOADS
FLIGHT ENVELOPE
Allowed rolling up to 60° and climbing or descending till 30° from horizontal. Acrobatic turns
and intended spins are prohibited.
Max. speed v IAS (km/h)
Turn
160
100
Roll 60°
Slip
Acrobatic turns
and intended spins are prohibited!
Max. load + 4
Max. negativ load - 2
Max. load with flaps 2
For MTOW 600 kg A

LIMITATION
TEMPERATURE LIMITATION
OTHERS
VFR day-flight only without
freezing condition!
max. temperature on ground 40° C
min. temperature on ground -5° C
- Do not push or pull on any laminate covers, control surfaces, or the ends of the propellers
blades
- In case of leaving aircraft fix its position by ropes to the ground
- Locking of canopy and fuel tanks is recommended when leaving the aircraft
- No smoking in the aircraft!
17

FAILURE DURING START ON THE GROUND
FAILURE DURING START IN AIR
FAILURE DURING FLIGHT
1. throttle set to idle
2. Braking
3. Magnetos OFF
4. Stop fuel
5. master OFF
1.Speed 90- 95 km/h
2. Landing on runway or on place ahead with possibility of turning
3. Magnetos OFF
4. Stop fuel
5. Master OFF
6. Tightening of safety belts
7. flaps if needed
Insufficient height for turning engine On:
1. Speed 90-95km/h
2. Choose place for landing (direction, surface, wind, angle)
3. Magnetos OFF
4. Stop fuel
5. Master OFF
6. Tightening of safety belts
7. Flaps if needed
Enough height for turning engine ON:
1. Speed 90-95km/h
2. Choose place for landing (direction, surface, wind, angle)
3. Check:- magnetos ON
- fuel open, enough volume
- turning on fuel pump
- Master ON
4. throttle open, choke if needed
5. Start – if engine start it running check proper function near to a chosen place
6. If engine works properly and instruments shows allowed values continue to the
nearest airfield, land and check the engine
7. If engine do not want to start or instrument shows border values continue with
emergency landing on chosen place
8. Magnetos OFF
9. Stop fuel
10. Master OFF
11. Tightening of safety belts
12. Flaps if needed
PART 3 Emergency procedures

EMERGENCY LANDING
INTERUPTED LANDING
FIRE ON GROUND, ENGINE OFF
FIRE IN AIR
1. Speed 90-95km/h
2. Choose place for landing (direction, surface, wind, angle)
3. Magnetos OFF
4. Fuel stop
5. Master OFF
6. Tightening of safety belts
7. Flaps if needed
1. If aircraft is equipment by adjustable propeller set the smallest angle of attack
2. Trim if needed
3. After reaching of 90 km/h start climbing
4. After reaching height 30 m set flaps to start position
5. hide flaps after reaching safety height
6. repeat landing
1. Fuel Off
2. Heating Off
3. Evacuate aircraft and quench the fire (if possible)
1. Fuel OFF
2. Throttle to maximum power
3. Heating OFF
4. Master OFF
5. Magnetos Off after burning the fuel in the carburetor and stopping the engine
6. Speed 90-95 km/h
7. Carry out an emergency landing
After quenching the fire do not try to start the engine!
Note:
Time needed to burn the rest of the fuel in the carburetor is about 30s.
19

CARBURETOR ICING
VIBRATION OF ENGINE OR PROPELLER
USING BALLISTIC RESCUE SYSTEM
Loss of power and rising temperature ( The engine may stop).
1. Speed 110-120km/h
2. Throttle to idle or to minimum depending on flight conditions
3. Leave the area of icing conditions(change altitude)
4. After 1 or 2 min slowly increase power to the cruise setting
5. If the engine is not working properly (lower power) land at the nearest airfield or a safe
place
If some vibration occurs, then it is necessary to:
1. Set the rpm of the engine to value with minimum vibrations.
2. Carry out an emergency landing on nearest airfield
3. If vibrations are increasing – carry out an emergency landing at the nearest safe place
1. Fuel OFF
2. Magnetos OFF, Master OFF
3. Tighten safety belts
4. Activate rescue system by pulling the trigger
Note:
In emergency, go at once to point 4.
The Trigger must be unlocked before flight! Use of the ballistic rescue system can
result in damage to the aircraft and injury to the crew.