At the onset of WWII, Australia realized that getting airplanes to defend itself from its aggressive neighbor was more and more difficult therefore they started a program to design and build homegrown warbirds.
The Boomerang was the first fighter designed and manufactured in Australia, done so by the Commonwealth Aircraft Corporation between 1942 and 1945. The Boomerang was mainly dispatched to equip home-based squadrons and rarely engaged in aerial combat.
In later service, the Boomerang would commonly be used for ground support duties, cooperating with Allied army units, in addition to secondary roles such as aerial reconnaissance and air sea rescue.
The engine used gave low power at altitude, but had excellent handling at lower altitudes, gaining the affection of most pilots.
Check here to get a test file that will allow you to validate your ability to print and build this 600mm rendition of the CAC Boomerang.
More information on the Boomerang here:
Check out the RCGroup discussion for more information or to ask questions:
This 600mm wingspan rendition is powered by a BR2205 with 2300Kv and is designed to be printed in LW-PLA, with a few key parts in PLA+, like the motor mount, spinner, servo and battery tray, propeller spinner. The design has carefully planned internal structures for LW-PLA slicing resulting in clean parts with minimal oozing. Major slicer support is provided to quickly print clean parts.
Included in this release:
• Factory files for Simplify3D v4
• Cura 4.13.1 3MF files
• Valid STL files for all components
• Assembly manual and user guide
• Sample markings
Print time: 85hrs
Print weight: 85g LW-PLA, 10g PLA
RTF AUW: 251g with 3x3.7g servos, 2205 2300Kv, 3S 550mAh.
X1 2205/QM2804 2300Kv Motor
X1 20A ESC
X1 500mAh 3S Lipo (or 900mAh 2S)
X3 3.7G Micro Servo (X4 if installing working rudder)
X1 4ch+ Micro Receiver
X1 3mm carbon rod (1x 300mm wing joiners)
X1 2mm carbon rod/round toothpicks (stab joiners)
X4 1.5mm carbon rod (fuselage stiffeners)
X1 1mm Music Wire (pushrods and elevator torque rods)
X4 6x2mm Magnets (cylinder shape)
X4 M3x10mm screws (fix the motor mount to firewall)
CA Hinge Sheet
Velcro (sticky back)
Some extra 1.75mm PLA filament (locating pins and possibly the fuselage stiffeners)
- Parts are provided to install a functional rudder.
2023-04-26: Updated Factory files. Added Porcupine Exhaust and slanted Motor Mount.
2023-03-12: I flew the prototype 4 times, last Sunday. No video, but proof of flight from 3 landing pictures. It flew marvelously. Lots of power from the 2205 2300Kv motor on 4.7x4 from 3S 550mAh. Got 3 deg right/down trust and only 251g! Lefty-Under-Hand-Launch at no more than 50% throttle.
Tom's first flights: https://www.youtube.com/watch?v=EOyozZsnG3Y&t=1s
3D PRINTING SETTINGS
• Print head = 250 deg c
• Print bed = 60 deg c
• Retraction distance to 0, you may need Extra Restart and Coasting.
• Fan set to 0
• Print head = 220 deg c
• Print bed = 60 deg c