Blog · Siemens NX · 3 November 2026

Two-seat electric drone built in Siemens NX by a 17-year-old student

A 17-year-old student with no NX training built 13 equation-driven parts, a 25-component drone assembly and three sizes in Siemens NX with SphereHarness.

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A 17-year-old student with no NX training built a two-seat electric passenger drone in Siemens NX from scratch: 13 parts, a 25-component assembly, and three sizes generated from one value. The work was driven through SphereHarness, an AI agent that works inside the CAD system, and the finished video runs 4 min 18 s.

The passenger version measures 5.06 m across the blades and 2,688 kg, according to the card shown in the video. The student did not need to know NX's commands or menus for any of it.

What was built

The narration lists 13 parts, all driven by equations, so one value (called S) sets the size of the whole aircraft.

Fuselage: a spline profile revolved into a teardrop, squeezed to 90 percent width and cut flat underneath. A slightly smaller inner shape is subtracted to leave a 60 mm composite wall. Windows and door are cut from the same shell, and the glass is polycarbonate.
Seats: two seats, each 550 mm wide with a 450 mm seat height, in polyurethane foam. The right seat is a copy of the left with the offset flipped.
Pilot controls: an aluminium steering wheel on a column and a floor pedestal.
Flying hardware: four aluminium tube arms, 2.6 m from the centre to each rotor, each with a motor and an 1,800 mm glass-filled blade. Four titanium legs, and a camera with an acrylic lens under the nose.
Power system: an octagonal lithium-ion pack under the cabin with an aluminium case, cooling fins, module seams, a red safety disconnect and a charge window. Below it, a titanium guard tray with vent slots and four bolted straps.
Wiring: red and black cables with 12 mm copper cores in PVC insulation run from the battery through a cable gland to a finned speed controller. Three phase wires climb into the motor. One harness part is placed four times.

NX view of the drone cabin glass: windshield, side window and door panel as separate surface bodies — The windows and door are cut from the same shell as the fuselage, so they fit it.

What the agent did

The video shows the NX part navigator filling with sketches, revolves, extrudes and a Scale Body feature while the chat does the work. Each shell part ends in a scale feature tied to S, and seat sizes and positions are named expressions of S.

NX model of the pilot's steering wheel on a column, isometric view — The pilot's aluminium steering wheel on its column, one of the 13 parts.

NX model of the octagonal battery pack with a red safety disconnect, isometric view — The octagonal lithium-ion pack with its red safety disconnect; the narration gives its weight as about 240 kg.

NX model of one power harness with red and black cables running to a finned speed controller — One power harness: red and black cables to a finned speed controller. The same part is used four times.

All 25 components go into the assembly at the origin, with arms, rotors and harnesses placed on the diagonals.

NX side view of the finished two-seat drone assembly with cabin, four rotor arms, landing legs and battery pack — The finished assembly of 25 components; the clash check over 300 pairs found no overlap.

What we measured

Clash check: all 300 component pairs, zero overlap.
Mass of the finished passenger drone: about 2,690 kg in the narration, 2,688 kg on the summary card.
Three sizes, each saved in its own folder and verified by its measured volume: E1 passenger at Scale 1.00 (5.06 m, 2,688 kg), E2 middle at 0.50 (2.53 m, 336 kg), E3 toy at 0.06 (30 cm, 0.58 kg).

Three drones side by side at true relative size: passenger, middle and toy — The passenger, middle and toy drones generated from one Scale value, labelled E1, E2 and E3.

The skill

Every successful step of the build was saved as a 506-step macro and wrapped in a skill called "Build the Two-Seat Electric Drone". To test it, the skill rebuilt the whole drone into a new folder in under two minutes. The narration says the result matched the original to the cubic millimetre, with zero clashes.

What the video does not show

The chat prompts are not on screen, so we cannot quote them here. The recording is sped up and only the NX window is captured. The battery mass and the 2,688 kg total come from the narration and the summary card; the video shows no mass-properties dialog for them.

Try it yourself

SphereHarness for Siemens NX is described at sphereharness.io/nx, and the setup steps are in the getting-started guide. The video is on the SphereHarness YouTube channel.