CraycleCub V2: Lightweight, Durable, and High-Performance 3D Printed FPV RC Airplane

CraycleCub V2 offers a fantastic option for hobbyists with its renewed design. It is suitable for both beginners and experienced pilots. With its improved aerodynamic structure, lightweight fuselage, and optimized components, V2 combines performance and stability.

Technical Specifications

• Length: 510 mm (20 inches)
• Wingspan: 800 mm (31.5 inches)
• Print Weight: 253 g (8.9 oz.)
• Flying Weight: 440 g (18.3 oz.)
• Wing Area: 9.16 dm2
• Wing Loading: 48 g/dm2
• Airfoil: USA 35B
• Minimum 3D Printer Size: 180x180x180 mm
• Filament Compatibility: PLA, TPU, PETG

Recommended Electronics

• Motor: 2204/5/6 1500-2500 KV
• Propeller: 5-7 inches (2-4 blades)
• ESC: 15-30A
• Servo: 4 x 9g servo
• Battery: 2S-4S 850-2200 mAh LiPo
• Radio System: Minimum 4 channels

Required and Optional Equipment

• Medium CA glue
• Y cable for aileron servos
• 2 mm self-tapping screws
• 1 mm steel rods (Pushrods)
• Adjustable pushrod connectors
• Servo tester
• Spray paint
• Model stand
• FPV camera and VTX

CG (Center of Gravity) and Control Surface Settings

CG points are marked under the wing. Pushrods should be made from 1 mm steel wire.

Servo connection points are as follows:

Aileron: 4th hole

Elevator: 3rd hole

Rudder: 3rd hole

Flap movements:

Rudder: 10mm

Aileron: 12mm

Elevator: 10mm

Radio Settings:

• Expos: 35%
• Rates: 75%

Step-by-Step Assembly Guide

Step 1: Fuselage Assembly

• Glue the “lipo_mount” part to “fs2.”
• Attach “fs1-nose-fs2-fs3” parts together using CA glue.
• Insert the “craycle_pim” parts into their slots to facilitate assembly.
• Avoid excessive glue usage.

Step 2: Elevator and Rudder Assembly

• Glue “fs4,” “elevator_r,” and “elevator_l” together at a 90-degree angle.
• Secure “elevatorbar” into the slot to distribute force evenly.
• Ensure minimal gap between elevator parts.

Step 3: Elevator Hinge Installation

• Carefully separate the elevator flaps from the elevator.
• Reattach flaps using TPU or CA hinges.
• Avoid applying the accelerator directly to the hinge slots.

Step 4: Rudder Assembly

• Attach “rudder1” and “rudder2” using “cub_pim.”
• Insert hinges before gluing the rudder onto the tail.

Step 5: Tail Landing Gear Installation

• Glue “rudder gear” to the slots.
• Assemble “wheel20_rim” and “wheel20_ring.”
• Attach the rear wheel using a 2 mm steel rod.
• Apply light lubrication for smooth rotation.

Step 6: Wing Assembly

• Install servos onto “wing1” before gluing “wing1-wing2-wing3.”
• Carefully separate ailerons and reattach using hinges.

Step 7: Attaching Wings to Fuselage

• Use a 5mm CF Rod for wing attachment.
• Insert servo cables before finalizing assembly.
• Attach “fs_support” to prevent fuselage stretching.

Step 8: Securing the Wing Structure

• Ensure wings are aligned straight before securing with 2mm screws.
• Flip the model to confirm the correct wing positioning.

Step 9: Servo and Pushrod Setup

• Install servos and prepare 1.2mm pushrods (~210mm length).
• Use Z-bends or detachable connectors on both ends.

Step 10: Landing Gear Setup

• Bend 2mm steel wire to create quick-release landing gear.
• Assemble “wheel35_ring” and “wheel35_rim.”
• Drill holes with a 2mm drill bit.

Step 11: FPV and Final Adjustments

• Install “lock_body” and “lock_catch” for hatch security.
• Mount FPV camera and VTX with screws or double-sided tape.

3D Printing Guide

CraycleCub V2 is optimized for 3D printing. The pre-configured Cura profile can be downloaded from Craycle’s website. Follow these slicer settings:

• Nozzle Temperature: 210-220°C
• Bed Temperature: 60°C
• Wall Thickness: 0.4 mm
• Retraction: 5 mm / 45 mm/s
• Infill: 20-25%
• Support: Not required (except for specific parts)

For best results, orient parts at a 45-degree angle to the print bed to optimize layer adhesion and minimize warping.

Final Words

CraycleCub V2 is a lightweight, aerodynamically optimized, and highly customizable model, making it an excellent choice for RC aviation enthusiasts. Whether flying traditionally or experiencing FPV, this model offers an exceptional experience. For more details and updates, visit craycle.com.

Enjoy your flight!

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PDF User Guide