OWL Spacewalker
(Semi Scale Model)
~ LW-PLA/ePLA-LW/PolyLight 1.0 Series ~
OWL Spacewalker Videos and Pictures
OWL Spacewalker Flying PlayList
Specification
- Wing Loading : 47.1-51 gr/dm^2.
- AUW/Flying Weight : 1200 - 1300 gr w/ and w/o Landing Gear respectively.
- Wing Area : 25.5 dm^2.
- Wing Cube Loading (WCL) : 9.3-10.1
- Flight Performance Category : Sport Aerobatic.
- Radio Channels : Throttle, Aileron, Elevator and Rudder.
- Wing Span : 1233 mm.
- Length : 852 mm.
Filaments to Print with :
- Please open “OWL Spacewalker – 3D Printed Part Information” to get suggested filaments to print.
- Some parts are best printed with PLA instead.
Please note that G-code files generated from ideaMaker does not compatible to use with Prusa original 3D printers. Please use Cura or S3D instead if you would like to regenerate the G-code files for your Prusa printers.
Spar Requirement :
- Wing Spars, 8mm OD Fiber Carbon Tube with Length 500mm, 2x (left and right wings)
- Wing and Fuselage Spars, 8mm OD Fiber Carbon Tube with Length 198mm, 2x (front and back)
- Horizontal Stabilizer Spar, 3mm OD Fiber Carbon Tube with Length 298mm, 1x
- Landing Gear Spars, 5mm OD Fiber Carbon Tube with Length 128mm, 2x (left and right LGs)
Landing Gear Options :
3 Options are available to setup landing gear parts:
- Option #1 : with skirt landing gears.
- Option #2 : with no skirt landing gears.
- Option #3 : with hand launch setup.
Option #1 : with skirt landing gears.
- Landing Gear-Base-L # GR4
- Landing Gear-Base-R # GR4
- Landing Gear-Top-L # GR3
- Landing Gear-Top-R # GR3
- Landing Gear-Bottom-A-L # GR4
- Landing Gear-Bottom-A-R # GR4
- Landing Gear-Bottom-B wSkirt-Front-L # GR3
- Landing Gear-Bottom-B wSkirt-Front-R # GR3
- Landing Gear-Bottom-B wSkirt-Back-L # GR3
- Landing Gear-Bottom-B wSkirt-Back-R # GR3
Option #2 : with no skirt landing gears.
- Landing Gear-Base-L # GR4
- Landing Gear-Base-R # GR4
- Landing Gear-Top-L # GR3
- Landing Gear-Top-R # GR3
- Landing Gear-Bottom-A-L # GR4
- Landing Gear-Bottom-A-R # GR4
- Landing Gear-Bottom-B-L # GR3
- Landing Gear-Bottom-B-R # GR3
Option #3 : with hand launch.
- Hand Launch Base-L # GR3
- Hand Launch Base-R # GR3
Tail Landing Gear Options :
2 options are available to setup tail landing gear:
- Option #1 : Utilizing rod with 2m OD (left side).
- Option #2 : All 3D printed (right side).
Option #1 – Assembly for 2mm rod tail gear.
- Create metal part tail landing gear with 3D printed template.
- See right side picture for what parts that need to be prepared.
Option #2 – Assembly with all 3D printed parts.
- See right side picture for what parts that need to be prepared.
Servo Bridge and 4mm Wing-FL Screw Installation :
- 4mm nut holder and “FUSELAGE-3 # P3_H15”, best gluing this before doing fuselage assembly (see the assembly video).
- Use hot glue after attaching with CA to secure but use your preferred method to attach anyway.
- Suggest to use hot glue for quick servo bridge installation.
Dummy Pilot and Pilot Chair Assembly :
- Use hot glue as depicted right side picture for pilot chair.
- Use velcro to attach dummy pilot.
Engine and No Engine Options :
- Use “FUSELAGE-1 # P3_H15” when using engines installed.
- Use “FUSELAGE-1 no Engines # P3_H15” when engines are not installed.
Easy Outrunner Motor Access Front Fuselage or Clean Front Fuselage :
- Use left side STL file “FUSELAGE-0-A # N0” so that it is easier to replace and install outrunner motor.
- For clean assembly, please use “FUSELAGE-0-A use glue # N0” instead.
Warning Regarding Motor Installation :
- This is seriously critical when installing motor mount ! The Motor Mount wall is already designed to prevent any unwanted move such as sudden pitch down or up when increasing the motor power. The thrust line is designed for certain up or down and also 2 degree right horizontally. The gap will introduce incorrect thrust line causing problem when flying.
- If your motor can not move freely, try to enlarge the shaft hole on the motor mount and remount the motor right after.
- If not happy with the default thrust line, feel free to modify it. The motor mount STEP file is provided for you under “SUPPORT\MM” directory.
Motor Mount Installation :
- Make sure that Motor Mount facing front side shows “Front” text.
- “MM Wall for Propdrive & Surpass # MM/MM Wall for SK3 # MM” , “FUSELAGE-0-A # N0/ FUSELAGE-0-A use glue # N0” and “FUSELAGE-0-B # N0” should be printed with PLA/PLA+.
Dummy Pilot :
- WW2/Classic Era Pilot (H64 x W66 x D35mm).
- To get the dummy, just click me.
Special Note for Rod Hinges :
- Please use 1.5mm OD rod for creating all control surface hinges if possible 2mm OD rod.
- Just prepare both 1.5mm OD or 2mm OD rod to create the hinges and pick whichever best fit.
Center of Gravity (CoG) :
- CoG is 56.7mm from Wing Root Leading Edge.
- Start with more solid flying and adjust gradually during the next flight.
Weight and Time Estimation (Under Construction):
Following tables show the weight of printed parts, number of required filament rolls and time required to print. The numbers are taken from S3D slicer calculation. From experience, actual numbers show about between -5% to -10% than depicted in the table. But the number may vary from printer to printer due to:
– Stepper Jerk value.
– Stepper Acceleration value.
– Steps per unit (either calibrated or uncalibrated)
– Extruder quality/condition.
– Nozzle quality/condition.
– Filament quality/condition.
– Etc.
For sure the relative number are useful when deciding to accept the total strengths or weights when printing. Picking higher strength to some parts are necessary to avoid breaking during high impact landing or sharp maneuver for example.
Here are the summary tables:
Klipper Firmware Does Not Accept “#” / Hash Character
Unfortunately the Klipper firmware does not accept the “#” / hash character when naming the file. More and more 3D printers nowadays and upcoming most likely will use the Klipper firmware where when using previous firmware such as Marlin, Prusa, etc. do not prevent it from processing.
Since our naming convention for our g-code files utilize the “#” character and already since we started the OWLplane, we still keep them until our new release models dated after July 2024 (after BD OWLjet 70mm 6s EDF).
No worry, to use our g-code files, just need to remove the “#” character, that is it !
Fore example :
“FUSELAGE-1 # P3_H15″ replace the file name with “FUSELAGE-1 P3_H15”
Note : no “#” character is used in the new file name.
How To Extract Our Zip Files
Somehow when the folder path is too long, files and directories can not be extracted directly to a destination directory. There is a workaround for this, just follow the guide below. What you need to follow is to double click zip file until you find the directory. From there, double right click to invoke a “copy” command. After that, just paste the directory into your destination directory. That is it !
Table of Contents
Update History
No Update for this model yet
Recommended Setup
- Motor Options : 3536 size outrunner motor with around 1000Kv motor with 3s LiPo battery. Lower than 1000Kv may accept higher battery such as 4s but please consult with outrunner motor product specification.
- Servo Options : 4 x 12gr servos as follow 2 x 12gr servos for ailerons, 1 x 12gr servo for elevator and 1 x 12gr for rudder (see some options above but not limited to).
- ESC Options : ESC with 40A, just pick your favorite ESC but make sure that rated at least 40A or follow the motor specification.
- Propeller Size for 3536 outrunner motor : depending on your motor Kv. For around 1000Kv, tried with 11x6, it works great with 3s LiPo battery (suggestion : choose lower Kv to get lower temperature for the same propellers especially when you print the motor mount with PLA and use low quality spinner).
- Battery Size : 3s 1800-2200mAh LiPo battery.
Tools and Materials
- Printer, in general 200mm x 200mm x 200mm (W x L x H) for all OWLplane Models.
- Filament: LW-PLA from ColorFabb, ePLA-LW from eSUN and PolyLight 1.0 from 3DLabPrint.
- CA glue with accelerator. Use thick glue to join surface to surface. Use thin CA glue for coating the joint surface areas.
- Velcro sticker/polyester hook and loop peel-n-stick self-adhesive for locking the battery.
- Fine sandpaper.
- Sharp knife.
- Screwdriver and/or allen wrench for chosen screws/bolts.
- Pliers, needle-nose pliers, nippers.
- Steel bolt cutter.
- Dremel/rotary tool for cutting carbon fiber tubes and rod with more than 2.5mm.
- Electric drill, its drill-bit size from 1.5mm - 5mm and step cone drill.
- Propeller shaft reamer or hole puncher reamer.
OWLplane Printers (for your ref.)
See figures below some printers used, created, developed and modified by OWLplane. Two group printers are set, the first one is utilized only for printing PLA/PLA+ and the other one is utilized to print with ABS, ASA and HIPS filaments (the one with enclosures). Just hover onto the figures to find more information about them.
Modified all Bowden setup printers into Direct Drive but leave Tevo Tornado and Anycubic Mega as is (still in bowden setup).
Hardware Needed
For Fuselage and Hatch:
- M3 x 0.5mm thread x 12mm screws with their washers for mounting outrunner motor to motor mount wall - 4x.
- Self tapping screw M3x20mm or M2.5x20mm for mounting motor wall and its "FUSELAGE-0-A # N0" to the fuselage (FUSELAGE-0-B # N0) - 4x.
- 3/4mm OD and 54mm steel long shaft for main wheel axles - 2x (printed main gears optional).
- Landing gear wheel stop set collar 8x3.1mm/9x4.1mm for main wheel axles - 4x. (printed main gears optional).
- 1.5/2.0mm OD and 25mm steel long shaft for tail wheel axle or follow the template for rod style landing gear - 1x.
- Landing gear wheel stop set collar 9x2.1mm for tail wheel axles - 1x.
- Ballpoint pen spring for Motor Hatch - 1x.
For Wings (except the control surfaces):
- M4x30mm screw and washer for attaching Wings to the Fuselage - 1x.
For Aileron, Elevator and Rudder Servos:
- 1.5mm - 2mm rod for creating aileron, elevator and rudder hinges (ER308L - TIG Stainless Steel Rod).
- 1.5mm - 2mm rod for creating aileron, elevator and rudder pushrod (ER308L - TIG Stainless Steel Rod).
- Landing gear wheel stop set collar 9x2.1mm for aileron, rudder and elevator - 4x (optional).
- Linkage stopper D2.1mm for for flap, aileron, rudder, flap and elevator - 4x.
- 2.0mm-2.5mm OD shaft for creating pins connecting two parts for aileron and stabilizer.
*) Illustration only
3D Printed Motor Mount, Propeller Spinner and Collet
Motor Mount Requirement
Motor mount wall should be 3D printed with more heat resistance filaments such as ABS, ASA or HIPS. If your 3D printer does not have enclosure you may want to try with PETG filament (more heat resistance than PLA/PLA+). In case you still would like to use PLA, please do annealing process (not sure can do for standard PLA), some successful with HT-PLA/Hight Temp-PLA. Click here for you to read about annealing article.
Propeller Spinner and Collet Requirement
OWLplane does not provide STL file for printed propeller spinner due to our concern about strength, shape and uniform weight when spinning at high speed. Not all 3D Printer has really free of skew issues for all their axes. The skew issue generates uneven shape that will lead to problem when spinning. Good spinner should be available in your local hobby store or online store, even that spinner, you still need to balance it before using it.
Spinner and Collet Requirement :
1. 38mm diameter size spinner.
2. 5mm or 4mm shaft propeller collet (check your purchased motor shaft to pick the right size propeller collet).
Please watch the following Videos to balance your Propeller and Spinner:
Assembly Figures
Spacewalker Fuselage Assembly
Spacewalker Wings Assembly
Spacewalker HStab Assembly
Spacewalker VStab Assembly
Spacewalker Hatch Assembly
Spacewalker LG Assembly
