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FLIGHTORY LARK User Manual

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USER MANUAL
V.1
© 2023 Flightory by Szymon Wójcik All rights
reserved.
1
USER MANUAL

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Summary of Contents for FLIGHTORY LARK

  • Page 1 USER MANUAL © 2023 Flightory by Szymon Wójcik All rights reserved. USER MANUAL...
  • Page 2 Socials Join Flightory Tech group on Facebook and create community with us. Share progress of your builds. Any suggestions or questions welcome. www.facebook.com/groups/flightory Follow Instagram where I share more footage on a regular basis www.instagram.com/flightory_ USER MANUAL...
  • Page 3 General Aircraft Data General data Wingspan 1290mm Wing area 24 dm² Lenght 865mm Center of Gravity 66mm from leading edge 1100-3000g Optimal Cruise Speed 50-60 km/h Airfoil Eppler 193 Root Chord 210mm 195mm Aspect Ratio Wing load 45 - 125 g / dm² USER MANUAL...
  • Page 4 General Aircraft Data 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.
  • Page 5 CFD Analysis 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.

  • Page 6: Exploded View

    Exploded view USER MANUAL...
  • Page 7 Reccomended RC Equipment Reccomended electronics Motor T- Motor F90 1300KV Propeller 7x4 / 7x5 / 7x6 Flight Controller Speedybee F405 Wing or any other Mavlink FC Matek M10Q or similar GPS with compass Servos Corona 929MG Metal Gear or similar BlHeliS 40A Battery 4S (max 4S6P 21Ah Li-Ion) or smaller pack / 3S battery also possible...

  • Page 8: Required Accessories

    Required accessories ITEM QUANTITY 10x500mm Carbon Tube (MAIN SPAR) 6x500mm Carbon Tube 12x430mm Carbon Tube (TAIL BOOM) 6x200mm Carbon Tube (V STAB SPAR) 6x384mm Carbon Tube (H STAB SPAR) Thin CA Glue 20g tube CA Activator 1 (optional but useful) M3 Threaded Insert (Outer Ø5mm, height 5mm) M3 screw...
  • Page 9 PARTS LIST - FUSELAGE 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...
  • Page 10 PARTS LIST - WINGS 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 USER MANUAL...
  • Page 11 PARTS LIST - TAIL 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 USER MANUAL...

  • Page 12: Print Settings

    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.
  • Page 13 Print Settings 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.
  • Page 14 Parts Orientation 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 USER MANUAL...
  • Page 15 Parts Orientation FUS 3 - 3% gyroid infill FUS 4 - 3% gyroid infill USER MANUAL...
  • Page 16 Parts Orientation FUS 5 - 6% gyroid infill NOSE - 4% gyroid infill + 2 walls USER MANUAL...
  • Page 17 Parts Orientation NOSE VTX COVER- 4% gyroid infill + 2 walls HATCH FRONT 1 - 3% gyroid infill USER MANUAL...
  • Page 18 Parts Orientation HATCH FRONT 2 - 3% gyroid infill HATCH SIDE 1 - 3% gyroid infill USER MANUAL...
  • Page 19 Parts Orientation HATCH SIDE 2 - 3% gyroid infill WING 1 - 3% cubic subdivision infill USER MANUAL...
  • Page 20 Parts Orientation WING 2 - 3% cubic subdivision infill WING 3 - 3% cubic subdivision infill USER MANUAL...
  • Page 21 Parts Orientation WINGLET- 3% cubic subdivision infill AIL- 4% cubic subdivision infill USER MANUAL...
  • Page 22 Parts Orientation TAIL 1 - 6% gyroid infill V-TAIL 2 - 3% gyroid infill USER MANUAL...
  • Page 23 Parts Orientation HORIZONTAL STAB - 3% gyroid infill ELEVATOR- 4% gyroid infill USER MANUAL...
  • Page 24 NOSE VARIANTS There are 2 variants of the nose. You can choose version with a VTX mounted inside and a 19x19mm FPV camera, or a clean version with just the FPV camera. The VTX mounts on a "shelf" and the available space is sufficient to accommodate any VTX.
  • Page 25 STEP files All files are available in STL format. In addition, some important elements are available in STEP format, which allows easier editing and customization. You can find these files in folders labeled STEP USER MANUAL...

  • Page 26: Fuselage Assembly

    Fuselage assembly Prepare all fuselage segments. Before gluing, you can gently sand the surface of all elements, especially the gluing surfaces. It’s best to use thick CA glue. USER MANUAL...
  • Page 27 Fuselage assembly Prepare parts printed from PET-G or other hard material. Take the BATTERY PAD and paste it in the designated place in the front of the fuselage. Take FUS ROOT and glue with CA to the fuselage in the corresponding places. It’s best to use thick CA glue.
  • Page 28 Fuselage assembly Take the TAIL BOOM MOUNT printed with PETG or another rigid material and paste it into the designated slot. This component It’s best to use thick CA glue. reinforces the section of the fuselage to which the tail boom will be attached USER MANUAL...
  • Page 29 Fuselage assembly Now take M3 threaded inserts with an outer diameter of 5mm. Glue them into the designated places in the front part of the fuselage. You can use a slightly heated soldering iron for this. Then glue NOSE REINFORCEMENT printed from PETG or other hard material.

  • Page 30: Tail Assembly

    Tail assembly Now, get the tail parts ready and glue them together. It’s best to use thick CA glue. USER MANUAL...
  • Page 31 Tail assembly Prepare the tail boom. Cut a carbon tube with a diameter of 12mm to a length of 430mm. Before gluing the tail, you can make sure that the tail boom has "fully entered" the designated slots. Correctly, the marked distance between the fuselage and the tail should be 173mm.
  • Page 32 Tail assembly At this stage, it is necessary to attach the elevator servo and the tail boom. Inside the tail, there is a designed channel for the servo cable. While installing the servo, guide the cable through that channel and into the tail boom.
  • Page 33 Tail assembly Take the HORIZONTAL STABILIZER parts and the STABILIZER TIPS. Insert 6mm carbon tubes cut to the respective lengths of 384mm for the horizontal stabilizer and 200mm for the vertical stabilizer into the designated locations. You don't need to glue the tubes simply insert them.
  • Page 34 Tail assembly It’s best to use 5 min epoxy glue. Now, glue the tail boom to the fuselage. Start by routing the elevator servo cable into the fuselage and precisely fit it in place without glue. It is crucial to to align the tail, ensuring that the horizontal stabilizer is perfectly parallel to the wings.
  • Page 35 Tail assembly Now you can mount the elevator. Glue it together from two halves, and then use three polyester hinges with dimensions of 20x30mm and glue them into the designed slots. You can use ready-made hinges or cut them from flexible material, or even 3D print them from a material like TPU.
  • Page 36 Hatches Take the hatches parts and assemble them. For the FRONT HATCH, also insert LOCK 1 LOCK 2. Assemble it, adding a small spring, and glue it in the designated place. Use a small amount of CA glue, but be careful not to spill the glue and block the lock. For the side hatch, paste a 6x3mm magnet into the designed slot.
  • Page 37 Hatches Check if the hatches fit well the fuselage. Also, glue the second 6x3mm magnet into the fuselage in the place where the side hatch is inserted. USER MANUAL...

  • Page 38: Motor Mount

    Motor Mount You can now install the motor. Prepare the motor mount printed from PETG. It is designed for the recommended T-Motor F90 motor or another with the same screw spacing. The motor is attached to the fuselage from the outside using M3 screw.
  • Page 39 Nose mount Now you can mount the nose with short M3 screws. If you are using version with VTX, you can put your VTX on the "shelf" and cover it with NOSE VTX COVER and secure the antenna. USER MANUAL...

  • Page 40: Wings Assembly

    Wings assembly Glue the wing segments together. Insert a 6mm carbon tube cut to a length of 500mm. There is no need to glue the tube, just insert it into the designed slot USER MANUAL...
  • Page 41 Wings assembly Insert the aileron using 20x30mm polyester hinges or ones made from another material, similar to the elevator. Then, using a slightly heated soldering iron, attach M3 threaded inserts designed for servo cover mounting. Set the servo so that the control horn protrudes through the opening in the servo cover, glue it in place using hot glue, and cover it.
  • Page 42 Wings assembly Finally, install the WING ROOT printed from PETG or another rigid material. In the lower part, there are designed slots for regular M3 nuts, which will be responsible for attaching the wings to the fuselage. Insert them there and secure using a few drops of CA glue. Then, glue the root to the wing.
  • Page 43 Wings assembly Now, insert carbon tubes with diameters of 10 and 6mm, cut to a length of 500mm. These are the main wing spars. Slide the wings in and push them against the fuselage. Thread the servo cables through the designed channels and lead them into the fuselage. USER MANUAL...
  • Page 44 Wings assembly M3 screws The wing assembly is simple and quick. After pushing the wings against the fuselage, screw in two M3 screws into the designated places. The screws are anchored in PETG-printed material, making the system durable and resistant to repeated wing disassembly USER MANUAL...
  • Page 45 Finishing build Finally, arrange the rest of the equipment. The battery pad can accommodate a large pack, even a 4S6P Li-Ion battery. In this configuration, the flight time can be maximized. Of course, you can use a smaller pack or Li-Po batteries as well. Additionally, the applied motor configuration is efficient enough that stable flight can be achieved at around 30% throttle or even less.

  • Page 46: Before Flight

    Before flight The model is ready to fly. Before flying, take care of the correct balance, which is 66mm from the leading edge. Check the correct operation of the ailerons and rudders and the direction of propeller rotation. The takeoff is done by hand throw. Grab the fuselage under the wings and throw it in a confident motion at a slight angle of attack.
  • Page 47 USER MANUAL...