FLIGHTORY LARK User manual
1
USER MANUAL
USER MANUAL
V.1
© 2023 Flightory by Szymon Wójcik All rights reserved.
General Aircraft Data
USER MANUAL 3
General data
Wingspan
1290mm
Wing
area 24 dm²
Lenght
865mm
Center of
Gravity 66mm from leading edge
AUW
1100-3000g
Optimal
Cruise Speed 50-60 km/h
Airfoil
Eppler 193
Root Chord
210mm
MAC
195mm
Aspect
Ratio 5.8
Wing
load 45 - 125 g / dm²
General Aircraft Data
USER MANUAL 4
The aircraft is a 3D-printed UAV in a classic configuration with a tail boom and
a pusher propeller. It is designed for optimal performance and compactness.
The geometry has been carefully examined using CFD and real flight tests.
The platform is designed with accessibility and modularity in mind. The nose of
the aircraft is fully detachable, allowing for adaptation to various cameras,
sensors, and other types of payloads. By default, it is configured for a standard
19x19 FPV camera and any VTX also located in the nose. All files are available in
STL format, and some of them are also provided in STEP to facilitate easy
editing and customization for individual needs, such as camera mounts,
antennas, and others. With the recommended motor system and a 21AH 4S6P
Li-Ion battery, low current consumption can be achieved during stable flight,
providing a flight time of over 4 hours. The power reserve is substantial, and
flight is possible at around 30% power, allowing for the use of 3S packs as well.
Depending on the user's requirements, they can customize the payload,
battery, and achieve an aircraft tailored to their needs.
CFD Analysis
USER MANUAL 5
The geometry was designed to provide the best possible aerodynamic characteristics. The Eppler E193
airfoil was selected. With the center of gravity correctly positioned 66mm from the leading edge, the
aircraft maintains a substantial margin of longitudinal stability with zero pitching moment at zero angle of
attack. Between 0 and 2 degrees of AoA, the aircraft achieves maximum efficiency at speeds ranging from
50 to 60 km/h. With the recommended motor and propeller and 4S battery, the aircraft flies steadily in
level flight at approximately 30% power, resulting in an average current draw of 4A and providing over
4 hours of flight time. The power reserve is significant, allowing for the use of a 3S battery with lower
voltage. There is considerable flexibility in the choice of motor and battery, depending on user
preferences. When properly configured, the aircraft does not require a flight controller and can be flown
in both manual and automatic modes.
Exploded view
USER MANUAL 6
Reccomended RC Equipment
USER MANUAL 7
Reccomended
electronics
Motor
T- Motor F90 1300KV
Propeller
7x4 / 7x5 / 7x6
Flight Controller
Speedybee F405 Wing or any other Mavlink FC
GPS
Matek M10Q or similar GPS with compass
Servos
3x Corona 929MG Metal Gear or similar
ESC
BlHeliS 40A
Battery
4S (max 4S6P 21Ah Li-Ion) or smaller pack / 3S battery also possible
Receiver
Matek R24-D ELRS or similar
VTX
Digital or analog VTX
Required accessories
USER MANUAL 8
ITEM
QUANTITY
10x50
0mm Carbon Tube (MAIN SPAR) 1
6x500mm Carbon
Tube 3
12x430mm Carbon
Tube (TAIL BOOM) 1
6x200mm Carbon
Tube (V STAB SPAR) 1
6x384mm
Carbon Tube (H STAB SPAR) 1
Thin
CA Glue 20g tube
CA
Activator 1 (optional but useful)
M3
Threaded Insert (Outer Ø5mm,
height
5mm)
13
M3
screw 17
M3 nut
4
LW
-PLA 1 roll
PETG
Small amount
Polyester
hinge 20x25mm 11
Pen spring
1
Velcro
strap 2
Servo
extension cable 3
PARTS LIST - FUSELAGE
USER MANUAL 9
PART MATERIAL
FUS 1
LW-PLA
FUS 2
LW-PLA
FUS 3
LW-PLA
FUS 4
LW-PLA
FUS 5
LW-PLA
HATCH SIDE 1
LW-PLA
HATCH SIDE 2
LW-PLA
HATCH FRONT 1
LW-PLA
HATCH FRONT 2
LW-PLA
NOSE
LW-PLA
NOSE TOP 2 ANTENNAS
LW-PLA
NOSE TOP 1 ANTENNA
LW-PLA
NOSE CLEAN
LW-PLA
FRONT REINFORCEMENT
PETG
BATTERY PAD
PETG
BOOM MOUNT
PETG
MOTOR MOUNT
PETG
LOCK 1
PETG
LOCK 2
PETG
FUS ROOT L/R
PETG
PARTS LIST - WINGS
USER MANUAL 10
PART MATERIAL
WING 1 L /R
LW-PLA
WING 2 L /R
LW-PLA
WING 3 L /R
LW-PLA
WINGLET L /R
LW-PLA
AIL L / R
LW-PLA
SERVO COVER (
print 2) PETG
WING ROOT L /R
PETG
PARTS LIST - TAIL
USER MANUAL 11
PART MATERIAL
TAIL 0
PETG
TAIL 1
LW-PLA
TAIL 2
LW-PLA
ELEVATOR L/R
LW-PLA
HORIZONTAL STABILIZER L/R
LW-PLA
HORIZONTAL STABILIZER TIP (print2)
LW-PLA
VERTICAL STABILIZER TIP
LW-PLA
Print Settings
USER MANUAL 12
Slicer software you need to use is Ultimater Cura. All elements from LW-PLA
are best printed with ready-made settings prepared in a profile that you can
download. Settings are prepared a standard 0.4mm nozzle. Download link is
available on Flightory Blog. Infill in this profile is set to 6%. For this project I
recommend changing it to 3% for most parts. This is sufficient infill
Main features of slicer LW-PLA profile
•layer height: 0,25 mm
•single wall 0,4mm thickness
•3% Gyroid infill.
•Temperature: 235 degrees,
•flow 60%
•fan speed: 0%
The rest of the detailed settings are
saved in the profile.
To print hard PLA or PET-G parts, use
a default profile in CURA called
Draft. Layer height is 0.2 mm, infill
is 20% Grid pattern. Set the
temperature around 220 degrees.
You can fine-tune these parameters
to suit your needs and your printer.
Print Settings
USER MANUAL 13
All parts are suitable for printing on any standard printer with a small
working area. I printed all parts on a 200 x 200mm area. The settings
are just a base that you can change and adjust as needed. The
following pages will list my recommended infill settings for each part.
All elements can be printed without supports, but your printer
may have a problem with some horizontal surfaces in some
places. Depending on the effects, you may then consider turning
on supports for these elements and cleaning the printed
elements afterwards.
Parts Orientation
USER MANUAL 14
Important thing is the correct orientation of the printed parts
to avoid overhangs, and not have to use supports.
Below is the recommended orientation of parts and infill settings.
FUS 1 - 3% gyroid infill
FUS 2 - 3% gyroid infill
Parts Orientation
USER MANUAL 15
FUS 3 - 3% gyroid infill
FUS 4 - 3% gyroid infill
Parts Orientation
USER MANUAL 16
FUS 5 - 6% gyroid infill
NOSE - 4% gyroid infill + 2 walls
Parts Orientation
USER MANUAL 17
NOSE VTX COVER- 4% gyroid infill + 2 walls
HATCH FRONT 1 - 3% gyroid infill
Parts Orientation
USER MANUAL 18
HATCH FRONT 2 - 3% gyroid infill
HATCH SIDE 1 - 3% gyroid infill
Parts Orientation
USER MANUAL 19
HATCH SIDE 2 - 3% gyroid infill
WING 1 - 3% cubic subdivision infill
Parts Orientation
USER MANUAL 20
WING 2 - 3% cubic subdivision infill
WING 3 - 3% cubic subdivision infill
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