Chakor 1300
The small, light member of the LayerWings family. It has a clean pod body with the LayerWings egg nose: a fixed DJI O3 camera set flush in the face, side cooling vents and antenna stubs, plus three top hatches: camera, battery and autopilot. The plug-in side wings slide onto 2 carbon joiners, and a folding pusher sits at the tail. There are no ribs inside: printed shells are glued together and 2 carbon tubes per wing give the strength, the same build as the Koonj 1650. All sizes are in millimetres.
- Wingspan
- 1300 mm
- Length
- 960 mm
- Wing area
- 26.4 dm²
- Flying weight
- ≈ 1140 g
- Printed parts
- 35
- Print time
- ≈ 44 h
Turn it around
Drag to rotate. Open the parts or look inside the skin.
Where everything goes
The camera, battery, autopilot, servos and every carbon tube, shown in place.
X-ray view · camera, battery, autopilot, servos, tubes and joiners
Fuselage bays · camera, battery, wing root, autopilot, servos + ESC
Dimensions and CG
Dashed orange lines show where the parts split for printing. The CG mark is your balance point.
Numbers and setup
| Airframe | Value |
|---|---|
| Wingspan | 1300 mm |
| Overall length | 960 mm |
| Height | 267 mm |
| Root / tip chord | 250 / 160 mm, rounded tips |
| Wing area | 26.4 dm² |
| Aspect ratio | 6.4 |
| Mean chord (MAC) | 208 mm |
| Airfoil | NACA 2412 (12% thick) |
| Wing mount | Side plug-in, shoulder height, 3 sections per side |
| Dihedral | 1.5° each side |
| Stab / fin | 5.0 dm² / 2.0 dm² |
| Tail volume (H / V) | 0.46 / 0.029 |
| Flying weight (est.) | ≈ 1140 g |
| Wing loading | 43 g/dm² |
| Stall speed (est.) | 7.4 m/s (27 km/h) |
| CG | 72 mm behind wing LE at the root |
| CG safe range | 64–78 mm behind LE |
| Max lift coefficient (est.) | 1.29 |
| Best lift/drag (est.) | 14.2 at 40 km/h |
| Static margin (est.) | 18% of mean chord |
| Electronics & setup | Value |
|---|---|
| FPV | DJI O3 air unit, camera fixed forward in the nose |
| Autopilot | Matek H743-WING or Pixhawk 6C mini + M10 GPS |
| Motor | 2216 950 KV outrunner (pusher) |
| Propeller | 9 × 6 in folding pusher |
| ESC | 40 A with 5 V BEC |
| Battery | 4S 2200 mAh LiPo under H2 (or 3S 3000) |
| Servos | 4 × 9 g metal gear (2 wing, 2 tail) |
| Receiver | ELRS or any 4+ channel |
| Launch / landing | Hand launch · belly landing on skid |
| Cruise speed (est.) | 55–70 km/h |
| Flight time (est.) | 15–20 min |
| Throws | Aileron ± 10 mm · elevator ± 8 mm · rudder ± 14 mm |
Connect it once, right
ArduPlane channel map, power path and data links, drawn on the real airframe.
Sample wiring · S1 aileron left, S2 elevator, S3 throttle, S4 rudder, S5 aileron right
How it flies, on paper
Computed for the real geometry: NeuralFoil airfoil data, lifting-line wing, tail and fuselage build-up. An estimate until our flight tests confirm it.
Lift curve · drag polar · pitch stability · lift-to-drag versus airspeed
Parts, filament and carbon
3 wing sections per side and the one-piece ailerons print standing up; wing sections are turned diagonally so the 250 mm root chord still fits a 220 × 220 mm bed (250 mm height). Weights are estimates.
| Code | Part | Qty | Size (mm) | Filament | Each |
|---|---|---|---|---|---|
| Fuselage (printed upright) | |||||
| F1 | Egg nose + flush camera port + side vents | 1 | 160 × 104 × 106 | LW-PLA | 24 g |
| F2 | Battery bay | 1 | 180 × 104 × 112 | LW-PLA | 40 g |
| F3 | Wing root stubs (airfoil) + joiner sleeves | 1 | 180 × 160 × 110 | LW-PLA | 56 g |
| F4 | Rear pod + tail servos | 1 | 200 × 100 × 100 | LW-PLA | 34 g |
| F5 | Tail boom + motor mount seat | 1 | 200 × 46 × 50 | LW-PLA | 20 g |
| H1 | Camera hatch (nose) | 1 | 110 × 80 × 20 | LW-PLA | 4 g |
| H2 | Battery hatch | 1 | 122 × 82 × 18 | LW-PLA | 6 g |
| H3 | Autopilot hatch | 1 | 110 × 80 × 18 | LW-PLA | 5 g |
| Wing (side plug-in halves, printed standing, diagonal) | |||||
| W1 | Root section + root rib (L/R) | 2 | 180 span · 245 chord | LW-PLA | 46 g |
| W2 | Mid section (L/R) | 2 | 200 span · 220 chord | LW-PLA | 40 g |
| W3 | Tip section, rounded (L/R) | 2 | 190 span · 190 chord | LW-PLA | 30 g |
| A1 | Aileron, one piece (L/R) | 2 | 245 × 58 × 10 (standing) | LW-PLA | 9 g |
| Tail | |||||
| S1 | Stabiliser half (L/R) | 2 | 220 × 88 × 11 | LW-PLA | 12 g |
| E1 | Elevator half (L/R) | 2 | 212 × 42 × 8 | LW-PLA | 5 g |
| V1 | Fin | 1 | 170 × 100 × 13 | LW-PLA | 12 g |
| R1 | Rudder | 1 | 166 × 52 × 8 | LW-PLA | 5 g |
| Strong parts | |||||
| M1 | Pusher motor mount | 1 | 60 × 50 × 30 | PLA | 14 g |
| J1 | Joiner sleeve + wing nut plates | 1 | 110 × 70 × 30 | PLA | 14 g |
| C1 | DJI O3 camera bracket (20 mm) | 1 | 34 × 30 × 22 | PLA | 4 g |
| T1 | Autopilot + GPS tray | 1 | 80 × 60 × 40 | PLA | 8 g |
| SV | Servo frames | 4 | 40 × 30 × 15 | PLA | 3 g |
| HN | Control horns | 4 | 25 × 20 × 3 | PLA | 2 g |
| K1 | Belly skid (replaceable) | 1 | 180 × 30 × 10 | PLA | 10 g |
| 35 printed parts | LW-PLA 490 g · PLA 70 g | ||||
| Hardware | Size | Qty | Where |
|---|---|---|---|
| Front wing tube | Carbon tube 10 × 8 mm × 560 mm | 2 | At 25% chord, through all 3 sections of each wing |
| Rear wing tube | Carbon tube 6 × 4 mm × 530 mm | 2 | At 58% chord, through all 3 sections of each wing |
| Front joiner | Carbon rod 8 mm × 400 mm | 1 | Through the body, 150 mm into each front tube |
| Rear joiner | Carbon rod 4 mm × 340 mm | 1 | Through the body, 120 mm into each rear tube |
| Wing lock | M4 × 25 mm nylon bolt + nut plate | 2 | Through each root rib from underneath |
| Tail boom tube | Carbon tube 12 × 10 mm × 300 mm | 1 | Through F4 and F5, keeps the tail stiff |
| Stab rods | Carbon rod 4 mm × 410 mm | 2 | Front + rear, through the boom into both stab halves |
| Fin rod | Carbon rod 3 mm × 190 mm | 1 | From the boom up through the fin |
| Elevator / rudder pushrod | Steel wire 1.5 mm × 320 mm in 3 mm tube | 2 | F4 servos to the tail horns |
| Aileron pushrod | Steel wire 1.5 mm × 70 mm | 2 | Wing servo to aileron horn |
| Hinges | CA hinges 15 × 25 mm | 16 | 4 per aileron, 3 per elevator, 2 rudder |
| Hatch magnets | Neodymium 6 × 3 mm | 12 | 4 per hatch |
| Prop | 9 × 6 in folding pusher + 30 mm hub | 1 | Folds back for belly landings |
| Motor screws | M3 × 8 mm | 4 | Motor to M1 |
| Part | Wall | How it prints |
|---|---|---|
| Wing skin (no ribs inside) | 0.6 mm | LW-PLA shell, 1 perimeter at 0.6 mm line width, 0% infill. The curved shell carries the load |
| Tube channels (front + rear) | 0.8 mm | Printed sleeve from top skin to bottom skin, works as the shear web. 0.2 mm clearance on the tube |
| Root rib (wing side) | 1.2 mm | 3 perimeters, carries the joiners and the M4 bolt |
| Section end faces | 0.6 mm | Thin glue face with alignment keys, no inner ribs |
| Fuselage skin | 0.6 mm | LW-PLA, 1 perimeter |
| Fuselage ring frames | 0.8 mm | At each section joint only |
| Hatches | 0.8 mm | LW-PLA with PLA magnet seats glued in |
| Control surfaces | 0.45 mm | Single wall shell, 2 mm carbon rod in the hinge nose |
| Strong PLA parts | 1.6–2.4 mm | 4–6 perimeters, 30–40% gyroid infill |
How the parts join
Inside the wing
No ribs and no inner grid. Each of the 3 sections is a printed shell with 2 tube channels. Glue the sections together, then slide in the 10 × 8 front tube and the 6 × 4 rear tube.
Wing to body
Two joiners pass through the body: an 8 mm front rod and a 4 mm rear rod. Each wing half slides onto both, so it can't twist, and one M4 nylon bolt locks each root rib.
Hatches
Three magnetic top hatches: H1 nose camera hatch for the DJI O3, H2 battery hatch, H3 autopilot + GPS hatch. Each hatch is held by 4 magnets.
Tail
A 12 × 10 carbon tube stiffens the boom. Each stab half slides onto 2 × 4 mm rods through the boom, and a 3 mm rod runs up the fin. Straight hinge lines keep 30 mm clear of the folding prop.
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