️ Preparations First

Required Tools

• Foam-safe CA glue + accelerator (DO NOT use regular CA directly on EPO foam)
• Small hex screwdriver set, needle nose pliers
• Heat shrink tubing, servo tape, cable ties
• Marker, tape for alignment marks

Spec Reference

• Power: 90mm 12-blade EDF / 3748-1450KV motor / 100A UBEC ESC
• Battery: 6S 22.2V 5000~6000mAh LiPo (35C minimum)
• Servos: 9g digital servos ×12 (canards, ailerons, gear doors, vector)
• Material: EPO foam

Step 1: Fuselage Assembly (Only for KIT split fuselage)

1. Test-fit left & right fuselage halves completely first, mark alignment positions.
2. Apply thin, even foam-safe CA along mating seams; avoid excess glue squeezing out.
3. Clamp fuselage gently with rubber bands + cardboard spacers (prevent foam denting).
4. Let cure minimum 3–4 hours before continuing internal installation.

PNP version: Fuselage is pre-glued; skip this step.

Step 2: Install EDF Power Unit (Critical Step)

1. Assemble motor into 90mm EDF shroud, secure impeller collet do not over-tighten.
2. Mount rear fan cowl to EDF housing with supplied M3 screws.
3. Route motor/ESC cables forward through fuselage duct tunnel.
4. Slide full EDF assembly into rear fuselage duct; secure onto internal wooden bulkhead with 6× PWA3×12 screws.
   ✅ Check: Fan spins freely, no rubbing against shroud.
   ✅ Seal small gaps around duct with thin foam tape to prevent thrust leakage.

Step 3: Retractable Landing Gear & Gear Doors

1. Install nose landing gear first into front fuselage mount; fasten lock nuts (finger tight + 1/4 turn).
2. Fit main rear landing gear in lower fuselage slots.
3. Mount all gear door servos and install pushrods:
   • Nose gear door pushrod: ~41mm
   • Main gear follow-up door pushrod: ~22mm
4. Power gear system on bench before closing fuselage, adjust clevises:
   • Closed doors gap <1mm
   • No binding when gear extends/retracts

Use included plastic shims to fine-tune door alignment.

Step 4: Canard (Foreplane) Installation

1. Install canard servos into front fuselage servo trays, route wires backward.
2. Attach control horns to canard surfaces; connect canard pushrods (40mm length).
3. Mount both canards onto fuselage pivot pins, lock retaining screws.
4. Power receiver, center servos, set canard neutral position matching fuselage reference line mark.

Important: For elevator function – trailing edges of canards move UP with UP elevator input.

Step 5: Main Wing Assembly & Mounting

1. Cut reserved foam openings inside wing servo bays.
2. Secure aileron servos into each wing; run cables into wire troughs.
3. Fit aileron control horns, attach 63mm aileron pushrods.
4. Pass carbon main spar tube through fuselage into both wing roots.
5. Connect wing servo extension wiring (plug-and-play harness).
6. Mate wings to fuselage, fasten mounting screws (6 screws total).
   ✅ Ensure wiring is not pinched between wing & fuselage joint.

Step 6: Vertical Stabilizer (Rudder)

1. Connect rudder servo extension cable to fuselage harness.
2. Slide vertical fin onto fuselage rear locating pins.
3. Secure with KA3×10mm screws.
4. Install rudder pushrod, center rudder surface.

Step 7: Wiring & Receiver Installation

1. Layout all servo wires neatly inside fuselage, bundle with cable ties; avoid contact with hot ESC.
2. Mount receiver in front fuselage (away from ESC/motor interference). Use double-sided servo tape + foam padding.
3. Servo Channel Layout Reference (Standard)
   • CH1 Aileron
   • CH2 Elevator (Canards)
   • CH3 Throttle (EDF)
   • CH4 Rudder
   • CH5 Landing Gear UP/DOWN
   • Aux channels: Gear doors, thrust vector servo
4. ESC power wire runs directly to main 6S LiPo battery tray.

Step 8: Battery Tray & Center of Gravity (CG – DO NOT SKIP!)

1. Battery loads into forward fuselage bay under canopy.
2. Official CG position: Marked on lower main wing surface.
   • Balance plane upside down at the CG mark; nose slightly heavy is safer for maiden flight.
   • Shift LiPo forward/back to tune balance.

Never fly with rear CG – causes unstable pitch & tip stalls.

Step 9: Thrust Vector Servo Setup (V2 Feature)

1. Mount vector servo at rear near EDF nozzle.
2. Install linkage to movable exhaust nozzle.
3. Program transmitter mixer for vector (freewing manual mixer diagram).
4. Calibrate servo limits so nozzle does not jam at full travel.

Step 10: Final Assembly & Pre-Flight Test

1. Fit nose cone, cockpit canopy, magnetic missile ordnance.
2. Double-check all screws are tight, no loose wires.

Ground Check Sequence (Mandatory!)

1. Turn ON transmitter FIRST, throttle stick to LOW.
2. Connect aircraft LiPo battery.
3. Confirm all servos center correctly.
4. Verify control directions:
   • Aileron: Stick right → right aileron up
   • Elevator (Canards): Stick up → canard trailing edges up
   • Rudder: Stick right → rudder right
   • Gear switch: Gear retracts/extends smoothly, doors sync
5. Slowly ramp throttle to test EDF – no abnormal noise, no vibration.

Critical Build Tips & Common Mistakes

1. ❌ Never over-glue EPO foam – excess glue melts foam and creates warps.
2. ❌ Do not route wires near ESC heat sink; heat melts insulation.
3. ❌ Avoid over-tightening EDF impeller nut – cracks fan shroud.
4. ✅ Always test landing gear operation before fully closing fuselage (hard to fix later).
5. ✅ Secure LiPo with heavy-duty Velcro strap – high throttle can shift battery and shift CG mid-flight.
6. ✅ Use dual rates on transmitter for maiden flight: 60–70% travel to prevent over-control.