Cheel 1200 VTOL
Any debit or credit card · no Payoneer account needed · Pakistan: bank, JazzCash, Easypaisa
The same sleek blended wing as the Cheel 1200, with a bolt-on 4 + 1 VTOL kit: two carbon booms and four lift motors. It takes off and lands vertically, then flies forward on the pusher. No runway, no hand launch.
- Wingspan
- 1200 mm
- Length
- 566 mm
- Wing area
- 31.9 dm²
- Take-off weight
- ≈ 2.60 kg
- Flight time
- ≈ 45 min*
- Cruise
- 68 km/h
- Take-off
- vertical (4 + 1)
- CG
- 315 mm from the nose
* Plan figure = 75 % of the calculated 60 min at 68 km/h cruise. Estimate until flight-tested.
Where everything goes
Carbon spars, battery, autopilot, servos, wing lock and the internal ribs, shown in place.
X-ray of the VTOL version · the pusher version is the same without booms and lift motors · click to enlarge
How the wing joins the body · click to enlarge
Inside the wing: spar webs and diagonal ribs · click to enlarge
Dimensions and CG
Top, side and front views from the CAD. The red dashed line is the balance point.
General arrangement · dashed lines are the printed section joints · click to enlarge
Numbers and setup
| Airframe | Value |
|---|---|
| Layout | Blended wing-body flying wing, winglets, pusher |
| Wingspan / length | 1200 mm / 566 mm |
| Wing area / MAC | 31.9 dm² / 307 mm |
| Sweep / washout | 30° leading edge / −6° at the tip |
| Airfoil | Reflexed (self-stable), 16 % body → 12 % wing root → 10 % tip |
| CG | 315 mm behind the nose tip · neutral point 340 mm · static margin 8 % |
| Elevon trim | ≈ 5° up at cruise (normal for a flying wing) |
| Take-off weight | ≈ 2.60 kg incl. 300 g payload |
| Wing loading | 81.4 g/dm² |
| Stall | ≈ 44 km/h |
| Electronics & setup | Value |
|---|---|
| Pusher | 2814 900 KV + 10 x 6 folding prop, 60 A ESC |
| Battery | 4S3P 21700 Li-ion, single-layer flat pack, slides in under the spars |
| Servos | 2 x 9 g metal gear (elevons) |
| FPV | DJI O3 air unit, camera in the nose |
| Autopilot | ArduPilot (Matek H743 / Pixhawk) in the rear hatch |
| Lift motors | 4 x 2807 1300 KV + 9" props, 1.17 kg thrust each needed |
| Lift ESC | 4-in-1 45 A |
| Hover power | ≈ 436 W |
| ArduPilot | Q_ENABLE 1 · Q_FRAME_CLASS 1 (quad) · Q_FRAME_TYPE 1 (X) |
Filament and print list
Every file comes rotated, flat and centred for Bambu Lab A1, P1S, P1P and X1C. Checked: fits the bed with 8 mm to spare, watertight, no supports on the wings, body, hatches or winglets. The A1 mini (180 mm) is too small.
| Filament | Amount | Used for |
|---|---|---|
| LW-PLA / Bambu PLA Aero | ≈ 550 g (one 1 kg spool is plenty) | Wings, body, hatches, elevons, winglets · 2 walls, 0 % infill |
| PETG or PETG-CF | ≈ 106 g | Boom pylons and motor mounts · 5 walls, 40–60 % gyroid |
| TPU 95A | ≈ 8 g | Landing feet |
| Part | On the bed (mm) | Filament | How it prints | Supports | ≈ g |
|---|---|---|---|---|---|
| BODY-1L | 94 x 115 x 188 | LW-PLA | 2 walls, 0 % infill, standing on the rear joint face, nose up | none | 14 g |
| BODY-1R | 94 x 115 x 188 | LW-PLA | 2 walls, 0 % infill, standing on the rear joint face, nose up | none | 14 g |
| BODY-2L | 187 x 188 x 155 | LW-PLA | 2 walls, 0 % infill, lying on the flat centre split face (tail block: 3 walls) | none | 41 g |
| BODY-2R | 188 x 187 x 155 | LW-PLA | 2 walls, 0 % infill, lying on the flat centre split face (tail block: 3 walls) | none | 41 g |
| BODY-3L | 167 x 168 x 152 | LW-PLA | 2 walls, 0 % infill, lying on the flat centre split face (tail block: 3 walls) | none | 26 g |
| BODY-3R | 168 x 167 x 152 | LW-PLA | 2 walls, 0 % infill, lying on the flat centre split face (tail block: 3 walls) | none | 26 g |
| ELEVON-L | 102 x 101 x 240 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 14 g |
| ELEVON-R | 101 x 102 x 240 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 14 g |
| FOOT-LF | 18 x 18 x 14 | TPU 95A | 3 walls, 30 % infill | none | 2 g |
| FOOT-LR | 18 x 18 x 14 | TPU 95A | 3 walls, 30 % infill | none | 2 g |
| FOOT-RF | 18 x 18 x 14 | TPU 95A | 3 walls, 30 % infill | none | 2 g |
| FOOT-RR | 18 x 18 x 14 | TPU 95A | 3 walls, 30 % infill | none | 2 g |
| HATCH-H1 | 88 x 88 x 135 | LW-PLA | 2 walls, 0 % infill, standing on its front edge | none | 8 g |
| HATCH-H2 | 83 x 83 x 110 | LW-PLA | 2 walls, 0 % infill, standing on its front edge | none | 6 g |
| MOTORMOUNT-LF | 36 x 32 x 42 | PETG | 5 walls, 60 % gyroid, motor face down | build plate only | 7 g |
| MOTORMOUNT-LR | 36 x 32 x 42 | PETG | 5 walls, 60 % gyroid, motor face down | build plate only | 7 g |
| MOTORMOUNT-RF | 36 x 32 x 42 | PETG | 5 walls, 60 % gyroid, motor face down | build plate only | 7 g |
| MOTORMOUNT-RR | 36 x 32 x 42 | PETG | 5 walls, 60 % gyroid, motor face down | build plate only | 7 g |
| PYLON-L | 122 x 122 x 30 | PETG | 5 walls, 40 % gyroid, flat bottom down | none | 39 g |
| PYLON-R | 122 x 122 x 30 | PETG | 5 walls, 40 % gyroid, flat bottom down | none | 39 g |
| WING-L1 | 228 x 228 x 150 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 70 g |
| WING-L2 | 175 x 174 x 150 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 48 g |
| WING-L3 | 176 x 175 x 150 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 36 g |
| WING-R1 | 228 x 228 x 150 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 70 g |
| WING-R2 | 174 x 175 x 150 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 48 g |
| WING-R3 | 175 x 176 x 150 | LW-PLA | 2 walls, 0 % infill, 0.6 mm skin, standing on the inboard face | none | 36 g |
| WINGLET-L | 125 x 125 x 144 | LW-PLA | 2 walls, 0 % infill, standing on the base | none | 19 g |
| WINGLET-R | 125 x 125 x 144 | LW-PLA | 2 walls, 0 % infill, standing on the base | none | 19 g |
Carbon and hardware
| Qty | Part | Length | Where |
|---|---|---|---|
| 2 | Tube 10 x 8 | ≈ 700 mm | Main spars (cross inside the body) |
| 2 | Tube 6 x 4 | ≈ 400 mm | Rear spars |
| 2 | Rod 5 mm | ≈ 115 mm | Rear pins |
| 4 | Rod 3 mm | 25 mm | Winglet pins |
| 2 | M4 nylon bolt + insert | 25 mm | Wing lock |
| 22 | 1.75 mm filament | 20 mm | Body alignment pins |
| 8 | Magnets 6 x 3 | Hatches | |
| 2 | Tube 16 x 14 | 706 mm | Lift booms |
| 4 | Rod 8 mm | 16 mm | Legs (TPU feet) |
| 4 | M3 bolt + insert | Pylons through the wing |
How it flies, on paper
Computed on the real CAD geometry: a swept vortex-lattice model of the blended wing, NeuralFoil airfoil data (trained on XFOIL) and a part-by-part drag build-up. An engineering estimate, not 3D CFD, until our flight tests confirm it.
Lift curve, drag polar, pitch stability, L/D versus speed · click to enlarge
Lift along the span and stall map on the planform · click to enlarge
Pressure on the body and wing airfoil sections · click to enlarge
Drag build-up and flight time versus speed · click to enlarge
Stable flying wing
Neutral point 340 mm, CG 315 mm from the nose = 8 % static margin. The reflexed airfoil and −6° washout trim it with about 5° of up-elevon.
Gentle stall
The inner wing stalls first, so the elevons keep working. Span efficiency ≈ 0.91.
Efficiency
Best L/D ≈ 11.7 (pusher) and 7.6 (VTOL). The VTOL kit makes about 44 % of the VTOL's drag.
Flight time
At 68 km/h cruise: ≈ 60 min calculated, plan on ≈ 45 min in real flights.
How it holds together
Swept spars into the body
Each wing's 10 x 8 carbon main spar runs straight into the body; the two spars cross one above the other in a printed spar box, so the load goes carbon to carbon.
Printed webs + ribs
Thin slots inside each wing section print as a shear web along both spars and diagonal (Warren truss) ribs between them: the skin, the ribs and the carbon work as one box.
Plug-in wings
Slide each wing on along its spar, push the 5 mm rear pin home, lock with one M4 nylon bolt from below. Wings off for transport in a minute.
Flat battery under the spars
A single-layer Li-ion pack slides in from the front hatch and sits under the spar crossing; autopilot and ESC live under the rear hatch.
Bolt-on VTOL kit
Two 16 mm carbon booms clamp into printed pylons under the wing (2 M3 bolts each). Remove them and the same wing flies as the pusher Cheel.
What you get
Sent by email after purchase. Files are for personal use; you may print and fly as many as you like.
- 28 print-ready STL files, pre-oriented for Bambu Lab A1 / P1S / P1P / X1C (256 mm bed)
- Print guide with settings, supports and grams per part
- STEP files of the wing sections, elevons, winglets and VTOL kit + body outer surface
- Whole-plane assembly (.3mf / .glb), pusher and VTOL
- General arrangement drawing, x-ray, wiring and CG guide
- Free updates by email
Both versions: Cheel 1200 + VTOL
One airframe, two planes: fly it as a fast pusher wing, bolt on the VTOL kit when you need vertical take-off.
Any debit or credit card · no Payoneer account needed · Pakistan: bank, JazzCash, Easypaisa