Design it.
Balance it.
Fly far.
Free calculators for every RC plane, drone and VTOL: foam, balsa, fabric-covered, fiberglass, carbon or 3D-printed. CG for any layout, wing loading, flight time and battery packs. Plus our own long-range planes you can print at home.
7 birds. Each with one clear job.
Every plane is named after a bird of Pakistan. Pick by what you want to do: fly far, learn, soar or play.
Cheel 1200
Sleek blended wing-body with a pusher. About 1.5 hours on Li-ion (estimate).
Cheel 1200 VTOL
Hudhud VTOL
Koonj 1650
Chakor 1300
Shikra 1200
Hans 2000
From file to first flight
Get the STL files and slicer profiles in your account email. Every part is checked for a 256 × 256 mm Bambu Lab bed; wings print standing up in LW-PLA, with the ribs printed inside.
Build
Glue the sections together, slide in two carbon tubes per wing, plug the wings onto two joiners. No rib kits to cut, no jigs.
Fly
Set the CG from the drawing, load the ArduPilot channel map from the wiring diagram, hand-launch and fly.
Built simple. Documented fully.
Shells + two tubes
No rib structure to fight with. Each wing section is a printed shell with two tube channels; the carbon tubes carry the load.
Plug-in side wings
Airfoil root stubs on the body, two carbon joiners and one M4 bolt per side. The wings come off for transport in seconds.
Camera-first nose
A fixed DJI O3 sits flush in the egg-shaped nose, with cooling vents and three magnetic hatches for camera, battery and autopilot.
Everything shown
X-ray and bay views, wiring diagram, CG drawings, wall thicknesses, carbon tube list and aerodynamic charts for every plane.
Design and check your plane
Used by builders of foam, balsa, composite and printed planes. Every result is free, no sign-up.
Design Lab
Type in your own plane and get a scored analysis report: CG and neutral point, tail size, stall, L/D, flight time and wing strength, in 3D, with a PDF.
Open tool →Wing STL generator
Type in your wing and download print-ready STL sections with carbon tube channels, printed ribs, ailerons and a servo pocket.
Open tool →CG calculator
Balance point, neutral point and static margin for any RC plane, with a 3-view drawing and a battery-position helper.
Open tool →Flight time calculator
Endurance and range from weight, props and battery, with hover and cruise power.
Open tool →Wing loading calculator
Wing loading, stall and landing speed, and whether your weight is normal for your build.
Open tool →Battery pack calculator
Voltage, capacity, energy, weight and safe current for any S and P pack.
Open tool →Be first to fly it
Get one email when a new plane is ready to download, plus new designs and tool updates. No spam.