Multiplex FunJet 2 – Vector Thrust Conversion

If you want to upgrade your FunJet 2 with vector thrust, this setup is an easy and effective way to do it. The FunJet becomes incredibly fun to fly — capable of extremely fast flat spins, stable hovering, and smooth high-alpha flight with ease.

Printing Recommendations

• Material: ABS
• Walls: 5–6 top and bottom
• Infill: 100% recommended
• Supports: Required (build plate only)

BOM (Bill of Materials)

• 4× Half-pad M2 ball links (for vector control)
• 4× M3×10 button head screws
• 2× M3×8 button head screws
• 4× M2×10 button head screws
• M2 threaded rod (for linkages)
• 2× 4 mm carbon tube (for linkage rods)

Design Notes

This vector thrust system is designed around the Hobbywing FPV XRotor 2807 1700KV motor and includes a dedicated cable channel for clean and simple installation.
The motor mount uses a 19 mm bolt circle, so other motors with the same pattern may fit (untested).

The servo tray is glued inside the airframe and can be positioned slightly forward or backward to fine-tune the CG. The tray fits standard 9 g servos.

My Setup

• Multiplex FunJet 2
• Hobbywing XRotor 2807 1700KV
• 6×4.3 three-blade propeller
• FMS 40A ESC
• KST DS113MG servos
• FrSky SR10+ receiver
• CNHL 4S 2200 mAh battery

Vector throw: ~23° in all directions
Hover mode gyro gain: ~75%
Normal flight: Lower gyro gain on the vector system is recommended
CG: The balance point that has worked best for me is approx. 10 mm behind the factory CG marks

Feedback

Feedback is always welcome — feel free to share your results, improvements, or suggestions for future updates.