OWL BAE Hawk T1 - 70mm EDF
( Semi Scale Model )
~ LW-PLA/ePLA-LW/PolyLight 1.0 Series ~
OWL BAE Hawk T1 - 70mm EDF
Videos and Pictures
This 70mm EDF OWL BAE Hawk T1 has been tested with 4s and also 6s battery. It is recommended to use about 400gr or more battery such as 3300mAh 4s battery. If you would like to use 2200mAh 4s battery, you may want to use 3D printed battery protector to get the correct CoG by adding some weight at the front side if necessary (we also tested with 2200mAh 4s with the protector and it works great also).
Since OWLplane has released our 3D printed catapult launcher, suggested to use the catapult to launch. It is easier and safe when launching the plane. Reducing human error during throwing the model but if you prefer to throw, you still can do. We did hand launch the model with no issue. Please print and use grip protectors for hand launch since you can grip the model stronger and feel confidence to throw the model as hard as you can.
In general, this model must be printed with LW-PLA/ePLA-LW/PolyLight 1.0 filament only (you still may want to experiment printing some parts with PLA * for example printing wings with PLA for having extreme maneuver *) and no landing gear (hand launch or catapult launcher type of model).
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.
OWL BAE Hawk T1 70mm Flying PlayList
Specification
- Wing Loading : 82.5 gr/dm^2.
- AUW/Flying Weight : 1650 gr (with battery 3300mAh 4s or 2200mAh 6s).
- Wing Area : 20 dm^2.
- Wing Cube Loading (WCL) : 18.4.
- Flight Performance Category : Racer.
- Radio Channels : Throttle, Aileron and Elevator.
- Length : 1,093 mm.
- Wing Span : 994 mm.
Spar Requirement :
- 2 x 8mm OD and with 364 mm long fiber carbon tube as primary and secondary fuselage and wing spars.
- 2 x 6mm OD for left and right wing spars and with 375 mm long.
- 2 x 6mm OD and with 216 mm long for stabilizer spars.
Locking Belt for Attaching Wings to Fuselage :
Aileron/Wing Control Surfaces Rods:
Elevator/Horizontal Stabilizer Control Surfaces Rods:
Electronic Position :
Feel free to position the electronics to get the correct CoG.
EDF Installation w/ Fixed Leading Edge Lip and Removed Leading Edge Lip
Left picture is EDF installation with leading edge lip (you need screws to install) and right picture is EDF with no leading edge lip (you do not need screws to install but need to remove leading edge lip). You still can use your EDF with its leading edge lip still attached with generic provided bracket.
If you have 70mm EDF and would like to test if the bracket fits with your brand of EDF, feel free to download the bracket by clicking the button below:
No need to use screw if you pick the bracket installed with removed leading edge lip EDF as seen on the left and right sides of EDF in the picture above. In the middle is more generic bracket where you do not need to remove leading edge lip or if you have fixed leading edge lip EDF such as FMS Pro EDF version.
Canopy Trim :
Center of Gravity (CoG) :
- CoG is 98mm from Wing Root Leading Edge (see strip mark in the picture below).
How to Launch OWL BAE Hawk T1 70mm EDF Model :
Two methods are suggested to launch the model. The first one is to use OWLplane Catapult Launcher. Please visit OWLplane Catapult Launcher product page under “PRODUCTS” tab after clicking “ALL PRODUCTS”. You may want to download and print the 3D printed parts. The second one is by hand launching.
It is recommended to launch the model by utilizing your own launcher or OWLplane Catapult Launcher since it is human error free.
#1 – By Utilizing OWLplane Catapult Launcher.
If you plan to launch the model with your own catapult launcher, you may still want to download the model hook profile adapter from OWLplane Catapult Launcher repository/product and its free.
#2 – By Throwing.
Follow the following tips to launch :
– Lean your body backward.
– Use 3 finger grip to launch.
– Start throwing by also moving your body forward.
Note : Above pictures are illustration only, using 50mm BAE Hawk T1 – 50mm EDF instead.
Please Use 3-Point-Grip Protectors as Follow (Optional but Recommended to Use) :
If you choose to launch by throwing, please print the hand grip covers. Using the covers, it allows to grip the model harder comparing to only with naked hand grip holes.
Just ignore rough surface, it is not sanded yet.
Sand The Surfaces To Get Smooth Ones :
Comparing surfaces before and after sending it.
Some Note for Slicing STL Files :
Default Value are :
– Retraction: disabled.
– Heatbed: 55C degree C.
– Hotend: 245 degree C (you may want to change it between 235 – 260 degree C).
– Extrusion Multiplier : 0.55% (feel free to update this value).
– Extrusion Width: 0.40mm (feel free to find your preference value, but it will be around that value).
– Extrusion Height: 0.25mm (greater is faster but less stronger bonding).
– Printing Speed: 40mm/sec.
– Retraction Speed : 50mm/sec.
Special Note : disable “retraction” is default value.
Weight and Time Estimation :
Following tables show the weight of printed parts, number of required filament rolls and time required to print. 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.
Here are the summary tables:
Table of Contents
Update History
None.
Recommended Setup
- Motor Options : 70mm EDF 4s or 6s shown above but not limited to (it can accept 70mm EDF with fixed leading edge intake).
- Servo Options : 2 x 12gr servos for aileron (left and right) and 2x 12gr servos for elevator (left and right), total 4x 12gr servos.
- ESC Options : ESC may be enough with 80A, please consult to your EDF manual.
- Battery Size : LiPo 4s 3200mAh./ 6s 2200mAh with weight around about 400gr.
Battery Protector and/or Weight Balancer Holder for 2200mAh 3s/4s and 3300mAh 4s Battery :
One of challenges in 3D printed plane is where it has a wide range of possible total weight result. For example, the plane printed with 0.40mm comparing to 0.32mm extrusion width may end up the CoG moved about 2cm – 3cm backward with using the same battery. You may need to move the battery forward or add more weight at the nose to get back the CoG to its previous location. To solve this issue at the same time protecting your battery, the following STL files are created for your 2200mAh 3s/4s and 3300mAh 4s. Feel free to download and use the files (G-code files are also provided for Bowden or Direct Drive setup including STEP files).
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.
Hardware Needed
For Fuselage and Canopy:
- Self tapping screw M3x25mm or M2.5x25mm with their washers (optional) for mounting left and right wings including fuselage lid - 6x (4x wings and 2x fuselage lid).
- Ballpoint pen springs for Canopy - 1x.
For Aileron and Elevator Servos:
- 1.5 - 2.0mm rod for aileron and elevator hinges (ER308L - TIG Stainless Steel Rod but preferred TIG Aluminum Rod instead).
- 1.5 - 2.0mm rod for aileron and elevator pushrod (ER308L - TIG Stainless Steel Rod).
- 2.0 - 2.5mm rod for aileron and horizontal stabilizer support (ER308L - TIG Stainless Steel Rod).
- Landing gear wheel stop set collar 9x2.1mm for aileron and elevator - 4x.
- Linkage stopper D2.1mm for for flap, aileron, rudder and elevator - 4x.
*) Illustration only
Assembly Figures
BAE Hawk T1 70mm Fuselage Assembly
BAE Hawk T1 70mm Wing Assembly
BAE Hawk T1 70mm Horizontal Stabilizer Assembly
BAE Hawk T1 70mm Vertical Stabilizer Assembly
BAE Hawk T1 70mm EDF Canopy Assembly
