---
jupyter:
description: 'Machine and vehicle examples with planex2d in Python: a toy plane and a model rocket in 3D, a
Formula Student rear wing, double-wishbone suspension, an excavator arm, spur and planetary gears, a Wankel
engine and a scroll compressor.'
---
# Machine and vehicle examples
- [Toy plane](toy-plane.md)
- [Model rocket](rocket.md)
- [Rear wing with DRS](rear-wing.md)
- [Suspension kinematics](suspension-kinematics.md)
- [Excavator arm](excavator-arm.md)
- [Spur gears under load](spur-gears.md)
- [Planetary gearbox](planetary-gearbox.md)
- [Wankel engine](wankel-engine.md)
- [Scroll compressor](scroll-compressor.md)
These examples are machines and vehicles, from a toy plane and a model rocket to gears, engines and a compressor.
Each starts from 2D sketches. The plane, the rocket and the rear wing become solids with OpenCASCADE, the spur gears
are meshed by netgen and loaded in NGSolve, and the excavator arm moves as one constraint sketch. The Wankel engine
and the scroll compressor run through their cycle, with the areas of their chambers and gas pockets measured along
the way.
In this section
Toy planeFuselage frames, NACA wings and engines, lofted and revolved.
Model rocketA von Kármán nose cone as a spline, revolved, with swept fins.
Rear wing with DRSA three-element Formula Student wing, in 3D and meshed in 2D.
Suspension kinematicsDouble wishbones in bump and rebound, with their instant and roll centers.
Excavator armA 20 t arm as one constraint sketch, with its working range and a trench.
Spur gears under loadInvolute flanks as splines, meshed and loaded, with the von Mises stress.
Planetary gearboxSun, three planets and ring gear, 15 mm wide, with backlash.
Wankel engineEpitrochoid housing, a rotor that fits in every position, three chambers.
Scroll compressorTwo involute wraps and the gas pockets between them, shrinking evenly as the scroll orbits.
See [Examples](index.md) for the other collections.
